#CSpect v3.0.2.1 ZXSpectrum emulator by Mike Dailly
(c)Copyright 1998-2025 All rights reserved

Be aware...emulator is far from well tested, and might crash for any reason - sometimes just out of pure spite!

NOTE: DISTRIBUTION WITH TITLES IS NOT PERMITTED WITHOUT WRITTEN CONSENT.


Whats new
======================================================================================
v3.0.2.1
---------
Fixed a fullscreen/screen flicker on startup issue

v3.0.2.0
---------
Added more complete startup logging
Fixed a crash in 60hz 48k spectrum mode
Mouse movement scaled a little to make it less sensitive
Capped Mouse deltas to help slow mouse down
New custom CSpect command "SETBRK"/"CLRBRK", and debugger commands "SET"/"CLR" change to bitfield types so you can set multiple brk types at once
    Type Execute=1, Read=2, Write=4, OutPort=8, InPort=16


v3.0.1.5b
---------
Added binary to debugger command processor evaluation (so "g %00010000" will goto address $0010/16)
Added new custom CSpect command "SETBRK Type,StartAddress,EndAddress" to set breakpoints. $ED,$01,TYPE,STARTLO,STARTHI,ENDLO,ENDHI
    Type Execute=0, Read=1, Write=2, OutPort=3, InPort=4
Added new custom CSpect command "CLRBRK Type,StartAddress,EndAddress" to clear breakpoints. $ED,$02,TYPE,STARTLO,STARTHI,ENDLO,ENDHI
    Type Execute=0, Read=1, Write=2, OutPort=3, InPort=4
New Debugger commands added Set/Clr to block set breakpoints 
    Set <Type>,<StartAddress>,<EndAddress>, where addresses are 16bits
    Clr <Type>,<StartAddress>,<EndAddress>, where addresses are 16bits
    Where Type is Execute=0, Read=1, Write=2, OutPort=3, InPort=4
Timers are now recorded properly in the rewind system, and can now be back traced.
Timers added to the debugger view
HALT instruction (finally) fixed. Will now suspect exectution until an IRQ. In the debugger it'll step over it.


v3.0.1.4b
---------
Updating the CSpect z80 WAIT command, so that interrupts re-enable the CPU and the waits are "stacked" and unstacked on RETIs


v3.0.1.3b
---------
+More internal changes
 | Added quick bank registers
 | RamBank/RamBankAddress moved to non-managed memory
 | VSync check mirror added, as OpenTK access is very slow
 | Compile time option for fast memory support
 | -cspect to enable special CSpect CPU instruction "WAIT" , ​to wait for HL raster line ($ED 00). Not on HARDWARE. This is to aid in porting.
 | Removing more debugger/profiling stuff on a compile time option
 

v3.0.1.2b
---------
Fixed DEBUG OUT plugin


v3.0.1.1b
---------
Fix for gamepads and extended buttons
Temp fix for a hard crash when blending

v3.0.1.0
---------
First V3 public release

v3.0.0.6b
---------
Fixed ULA top/bottom rendering
Crash on exit fixed - I think. Please let me know
Fixed a small memory leak

v3.0.0.5b
---------
Fixed a crash when ULA/Layer2 blending was enabled before Layer2 was.
Fixed a crash in 16 colour tilmaps
Fixed Layer2 palettes
Fixed Windows Right mouse button
Fixed Sprite Window plugin not re-opening.
Mac mouse still not working
Crash on exit

v3.0.0.4b
---------
Fixed a Layer2 clipping crash.
Fixed Layer 2 window clipping
Copper Plugin updated to have register names (CTRL+ALT+C)
ESCAPE now works in non BASIC key mode (when -esc used on the command line)  (presses and releases SHIFT+1 together)
SNX files now enable ZXNEXT mode
SNX files now setup next registers the same as a .NEX file
NextReg $6E now reads correctly
NextReg $6F now reads correctly
NextReg $34 now reads correctly
NextReg $28 now reads correctly
Fixed 640x256 clipping
Copper Disassembler updated with register names and new fixed font and colours.

v3.0.0.3b
---------
Added "-threaded" command line option to enable the threaded renderer - may speed up, may slow down...
Fixed sprites disappearing

v3.0.0.2b
---------
Added missing archive file "OpenTK.dll.config" which stopped it wotking on MacOS and Linux

v3.0.0.1b
---------
Fixed debugger memory access lookup for +IX) and +IY) opcodes
Fixed timex rendering
New bundling/packaging tool being used
Fixed Layer2 320x256 right clip window
Fixed Sprites over the border
Fixed Tilemap rendering
Fixed ULA windowing when XScroll=0
Fixed Timex border

v3.0.0.0b
---------
Major internal restructuring to allow for API porting
Fixed a crash when the debugger "command" was just spaces
Major internal restructuring of mouse code to allow for custom Mac dynamiclib
Major cross the board rendering optimisations, which will result in emulation breaking in some (many?) cases
Major Z80 emulation optimisations which may also result in emulation failures.

v2.19.9.2
---------
Fixed a bug in -COM2 command line reading

v2.19.9.1
---------
Fixed BREAK opcode being swapped to $FD00 - coz I'm an idiot
Added new BREAK opcode to the debugger

v2.19.9.0
---------
BREAK opcode swapped to $FD00 - should map to a NOP on real hardware
Fixed a hard crash in sprites over the top border in modes 3,4 and 5

v2.19.8.1
---------
Fixed debug keys - F1,F10 etc. Sorry - my configs got nuked and that disabled them. Now working again.
Icon should also be fixed

v2.19.8.0
---------
Added a new extension DebugOut, allowing you to have your Z80 write text to the console (see readme.txt)
Changed to a "console app" so that console writing works the same on each platform.
Beast demo updated to demo "DebugOut" using "D" and "R" keys

v2.19.7.3
---------
Fixed command line option -mmc which was being over written by the drive to make the command line simpler

v2.19.7.2
---------
Fixed a bug where gamepads could be ignored if there were dummy controllers being enabled. Now controllers need at least 1 button
Fixed a bug where a program uses the NEX file to load from, and queries the "position" and it was wrong.

v2.19.7.1
---------
DMA timing a little closer
I now emulate the DMA "bug" where everything is out by 1 byte if running at 3.5 or 7 Mhz.
DMA Sample now uses keys 1,2,3,4 to swap CPU speeds - and demo the DMA bug
New non-GPL2 AY Emulation built in directly.
With the removal of the old AY Audio, Plugin License changed to MIT

v2.19.7.0
---------
High Freq monitor support. When started with -fullscreen and -vsync, CSpect will now try to set the monitor frequency to match the target FPS
Fixed up bugs in Layer2 demo - was pretty old, and broken. Now working as you'd expect.
Fixed up lowres build batchfile, and swapped to a .NEX image
Fixed up DMA dmo so it builds again - NOTE: you don't use ZXNEXT & Z80 together. Just use ZXNEXT
Old LDIRScale command removed - was never implemented.
Fixed CTC cascading.
Fixed streaming length of open file

v2.19.6.2
---------
Added mouse wheel support via port 0x0ADF
-emu now DISABLES emulation machine ID (0x08). This is now default, and -emu will set a REAL ZX Next (ID of 0x0a)
Try to detect wrong use of -nextrom so it doesn't all just die a horrible death.
Added Zip2SD tool, allowing you to build an SD card image from a ZIP file.

v2.19.6.1
---------
Fixed a bug in updated esxDOS where FSTAT with an open file wasn't working

v2.19.6.0
---------
Alt+F4 should work again
The latest OS (V2.07l) now works

v2.19.5.4
---------
Window ICON is only set on Windows, as MacOS appears to have a MONO bug that crashes (not tried Linux yet so disabled)

v2.19.5.3
---------
Fixed a crash where you startup in 48k mode then press F2 - due to esxDOS not being initialised properly
esxDOS now always "on" if no command line set

v2.19.5.2
---------
On HARD reset, spritres are now cleared
On HARD reset memory is cleared/roms reloaded
ULA line is now always cleared if enabled
Cleaned up debugger DIVMMC/NextRef layout
F8 now toggles VSync
Added new IFileIO interface to Plugin system
New [Function] attribute to allow cross plugin calling
Added cross plugin calling via a new "Execute()" command.
Internal refactor of esxDOS plugin to allow filesystem replacements
NEX file handle passing to z80 changed to use new inter-plugin calling system
Icon added to CSpect Window Title Bar

v2.19.5.1
---------
Fixed a NEX loading issue when limited numbers of banks are contained
Fixed "seeking" to the end of a file when limited numbers of banks contained
Added F_GETPOS to RST08 plugin
Version check removed (please subscribe to itch.io page)
Old analytics disabled

v2.19.5.0
---------
Fixed Layer 2, 320x256 right clipping
Fixed a sprite clip bug that was causing a hard crash
Optimised sprite rendering a little
Adding better streaming support through esxDOS.
Adding in better config mode support
Copper can now generate IRQs properly
Fixed stackless NMIs
Fixed some DIVMMC RAM/ROM stuff
Fixed some DIVMMC address paging
Fixed a debugger memory window crash
First pass at a sprite viewer
Fixed "EQUs" being used as debugger address symbols
Added NextReg $B2 for extended MD Pad buttons
Fixed DMA continuous mode when also in Prescaler mode - though, please don't do this! :D Note: This is a total fudge, it may break.
Fixed DMA status register. DMA End flag, and 1 byte transferred flag now works.

v2.19.4.4
----------
OUT ($ff),$40 will not disable ULA Vblanks, while OUT ($ff),$00 will now enable them (see NextReg $22)
New debugger command "NEXTBRK" will stop in the debugger after a Next instruction has been executed

v2.19.4.3
----------
Reverted the ZIP file detection to fix SDCard access.

v2.19.4.2
----------
I now try and detect if you've accidentally provided a ZIP file instead of an SD card image.
Fixed a CSpect crash when a streaming file wasn't there. (esxDOS emulation)

v2.19.4.1
----------
AY will now be reset with nextreg 6 (bits 0-1)

v2.19.4.0
----------
Added "-nodelay" startup option to the docs. Totally forgot about it, my bad.
Fixed up DACs, incorrect channels were sometimes being set, and some ports were wrong.

v2.19.3.0
----------
Extended the debugger's "Display" view to show the whole screenhttps://www.javalemmings.com/public/zxnext/CSpect2_19_4_1.zip
You will now be prompted to install OpenAL if it can't be found (on windows)
Fixed Layer 2 pixels in the border area
Fixed the esxDOS emulation streaming, allowing Pogie to run with audio from the command line again
Added "INPORT <16bitport>" and "OUTPORT <16bitport>" breakpoints in the debugger, allowing a break on a read/write to a port.
Added a new "TONE" command to the debugger. This switches on a single tone to the audio buffer to test if there are system playback issues.

v2.19.2.1
----------
Fixed the debugger screen so it's no longer transparent
.NEX file start delay added to loading of NEX files
-nodelay added to skip a .NEX file start delay
-rot90 Rotate the display 90 degrees
-rot180 Rotate the display 180 degrees
-rot270 Rotate the display 270 degrees
Command line processing cleaned up a bit
cspec_win.dat file format changed. Now includes a version [0], and screen rotation [1]

v2.19.2.0
----------
Added new debugger command "LOAD <filename>,<address>[,length]" where address can also be ""<bank>:<offset>""
Copper writes fixed up, wasn't executing all CPU TStates, so going slower than it should have been.
Updated screen drawing to be later in the line, to account for left border better.
Added a little Time base correction when audio/video buffers overflow instead of just throwing the spare frames away.
AY chips now respect the ABC,ACB and mono selection for each chip.
Added 2 new iCSpect.GetGlobal() calls; ""eGlobal.low_rom"" and ""eGlobal.high_rom"" to return the ROM/RAM at the low/high position
Added LoadFile() to iCSpect to load a file from SD card or relative file mmc path.

v2.19.1.0
----------
Rewrote command line processor
Added debugger macros to the command line '+def[0-9]"g $8000". use ";" for multiple commands: '+def[0-9]"g $8000;m$4000".  ALT+[0-9] to play macro.
Fixed a crash when L2 left clip was > L2 right clip
L2 no longer renders with top clip was > L2 bottom clip
Fixed a bug in the ULA rendering where the border colour was being set to the fallback colour, and not the border colour (which matches global transparancy).
Updated TileTest screen mode test app
OpenTK upgraded to v3.3.3

v2.19.0.3
----------
Fixed Timex Hires non-ULANext ink/paper orders
Fixed Timex Hires ULANext ink/paper orders
Added wildcard support in F_OPENDIR ($a3)
Added better exception reporting to the LOG for loading plugins
Fixed DeZog plugin building - DLL has been properly updated with new Plugin interface

v2.19.0.2
----------
Fixed up keyboard cross threading issues
Fixed up File open cross threading issue
Added a new OSTick() call to plugins to allow UI/OS function calls - please note the changes in plugins to avoid crashes
Fixed Timex hires with ULA Next ink/paper shift mode
Added a "Standard Plugin Keys" section to the readme.txt file

v2.19.0.1
----------
Fixed 2 profiler crashes, when clicking on the profile window in different states
Fixed ULA last line drawing
Fixed sprite in border bugs with new screen rendering
Fixed L2 640x256 and 320x256 clipping
Fixed Timex border colour issues
New Audio/Video syncing system
Fixed 320x256 window

v2.19.0.0
----------
Fixed a crash in Mode 6 and 7 when the tile window was larger than the screen
Fixed blending of tiles to border when in Mode 6 and 7
Fixed border when in Mode 6 and 7 when ULA is being used in blending
Fixed an esxDOS emulator issue, when a game requests too many bytes than is left in the file, and it fills the extra space with 0s resulting in game crashes
Timing fixed. 50hz and 60hz were both running slowly/weirdly both with and without sound. Should now be correct. 
-60 and -VSYNC should now be perfectly smooth again
-fps added to show FPS on title bar
-freerun disable all timers and run as fast as we can (must use -sound as well)
ULA Y scrcolling fixed to use Yscroll value MOD 192 (instead of anything over 192 being 0)
ULA+TILE Stencil mode added. Stencil will use any ULA mode (normal, timex, lowres)
Mode6/7 blending can now be used with stencil mode (where ever the hardware allowed it)

v2.18.0
--------
Mode 6 and 7 added in all it's ULA/Tile ordering weirdness. "(U|T) S (T|U) L" ordering
Mode 6 blending added (B+L)
Mode 7 blending added (B+L-5)
multiface is now paged out on RETN
Added the Mode 6 and 7 blend mode (and fiddling) test/demo + source

v2.17.1
--------
Fixed a crash in the profiler
Added a new extension to assosiate .NEX and .SNX files with the emulator

v2.17.0
--------
Fixed auto-mapping when RAM paged in over the ROM
IM1 now has IRQs disabled on triggering
Added Timex Hires and Timex Hi colour, smooth scrolling
Fixed Timex Hires border colour (I think)
Added DMA ports $0B and $6B
Contended memory no longer affects 7,14 and 28Mhz modes
Fixed a bug where all NEXT register stores (for reading back) were being zero'd on direct load of a NEX/SNA/SNX file
CTC timers should now always run at 28Mhz regardless of CPU speed.
SD card detection no longer crashes when it can't read partitions from a NEX/SNA/SNX file...
Fixed using F3 on older card images (2.06 and below)
New NextRegister Viewer window, activated by pressing <CTRL+ALT+R>
New Plugin command added "DissasembleMemory()" - see iPlugin.cs for details
Instruction TStates added to debugger view
New Profiler added, activated by pressing <CTRL+ALT+P>
Fixed up some TStates for Next instruction in the debugger

v2.16.6
--------
Regs $6e and $6f set to newer defaults, reading should also be fixed.
F_SEEK in esxDOS emulation now takes IXL (instead of L) for the offset type.
Hires tile maps now scroll properly - and at the right speed
640 L2 mode now clips in the lower screen properly.
Command line will now try and detect what your doing, so passing in 
  an SD card image will setup the proper options, same for NEX files etc.
  "CSPect.exe card.img"  or   "CSpect.exe game.nex" is now valid
Plugin "CSpect.Debugger(eDebugCommand.Enter)" now triggers on the next instruction, not a frame later.
NextRegister 2 - hard reset, should now work.
F3 now does a full hard reset, so should be far more dependable.

v2.16.5
--------
Now detects older Next ROM image files and will auto-disable the divMMC auto mapping so they still work.

v2.16.4
--------
Now correctly detects that OpenAL is not installed, and will message the user and disable audio
Added "IR" register to disassembly window
Fixed some 4bit relative sprite shape stuff.
F5 will now screen shot whatever is on screen. The Spectrum screen (pre-shader), or the debugger.
Window should now start centered on screen (or 0,0 if screen isn't big enough)

v2.16.3
--------
Fixed CTC timers, should now be correct
CTC cascading timers added (I think)
Fixed disassembler, "LD A,(IX-??)" should now be displayed correctly
Interrupts are now disabled im start of IM2

v2.16.1
--------
iCSpect interface now has the primary window handle so plugins can reference it
CopperDissassembler now uses the primary window handle in it's "Show()" to try and fix Linux rendering issues

v2.16.0
--------
Added directory functions to RST$08 plugin
Fixed screen rendering time a little.
on .NEX load, regs $B8-$BB are set to $82,$00,$00,$F0 - same as the OS.
Added reg $0A = bit 2, to be able to disable DivMMC auto mapping
Fixed crash when typing "BR <BANK>:<OFFSET>" in debugger
Added a "-mouse" command line option. This will disable the "grabbing" of the mouse.
When specifying an SD card image, you no longer have to specify -zxnext and -nextrom on the command line as well
Fixed Copper when the DMA is running and blocking CPU, now counts DMA "TStates" instead of CPU ones 
.NEX files will automatically disable DIvMMC PC address memory mapping
Added -divmap command line, so you can force memory mapping of the DIVMMC "on" when directly loading a .NEX file
Fixed a raster interrupt issue
Added -copwait command line so you can easily visualise where the copper splits are
Added -irqwait command line so you can easily visualise where the raster irq splits are
You can now toggle the copper and irq visualiser with CTRL+ALT+S via the copper disassembler plugin
You can now "set" command line globals via the Plugin interface

v2.15.2
--------
DeZogPlugin added to main distro so it remains upto date.
Added stackless NMI support
Reset register $02 added
Added NextRegs $B8 to $BB for DivMMC direct paging control
Current ROM and DivMMC registers added to rewind history
F6 now cycles through turbo speed settings
F5 Now takes a screen shot (was on CTRL+F3)
Fixed a rendering glitch when estimates for the right HBlank timing are "missed" and the line isn't drawn.
-log_cpu removed. Rewind probably replaces the need for this.
Updated RST$08 read/write to return values in BC,HL and DE as described in NextZXOS
Layer 2 banks can now be in the full 2Mb (regs $12 and $13)
Parallax demo updated to work with new $B8-$BA registers

v2.15.1
--------
Fixed SD card access - SpecNext IMG files now boot again

v2.15.0
--------
Fixed a crash when trying to get file info on a file that can't be found (or opened)
Fixed ULA colour 3 (where colours are 0-15) on a loaded NEX file.
Fixed Border colour when ULA Palette scale set to 255, but ULANext mode is disabled
All RST $08 operations have been moved to a new open source extension esxDOS.dll - lightly tested
Added Copper Read/Write to extension system - allowing for a copper debugger/assembler etc 
Added single byte peek/pokes to extension interface for simpler access
OpenTK upgraded to v3.3.2, any newer version won't install as it's incompatible with .NET frameworks
Added initial open source Copper disassembler/viewer - "<ctrl><alt>c" to open
Open source extensions added to Github: https://github.com/mikedailly/CSpect

v2.14.8
--------
Fixed a L2 scroll issue - that I just added. *sigh*

v2.14.7
--------
Fixed a L2 clip scroll offset issue

v2.14.6
--------
Switch on the new rendering mode again.

v2.14.5
--------
Fixed L2 left clip (I think)

v2.14.4
--------
Fixed L2 320 and 640 clip window
Fixed LD_R_A in debugger to "LD R,A"
Fixed a bug when writing the copper control byte, where it would reset the lower byte of the copper write address
Added the raster offset register ($62) but mostly untested.
Screen rendering now starts in the HBlank, not at the end of the line, allowing changes for the next line to take place in the HBlank.

v2.14.3
--------
Fixed BIS and Warhawk crash

v2.14.2
--------
Odd crash with last version, rebuilding zip to try and fix
Now alerts you to a new version
Did more sprite window fixes
Altered FLASH rendering

v2.14.1
--------
Added a check for AY regs above 16, as a common music driver has a bug in it
Timers are now reset on F3
IRQ TStates are reset back to 30 Pre-Tstates. This isn't correct but helps some games work better.
Stopped a crash on exit from fullscreen

v2.14.0
--------
Fixed esxDOS Read/Write so it's now returning NEXT pointer IX instead of HL.
You no longer need to extract ROM files to run in full SD card mode, they will be copied out the SD card image directly.
Sprite right edge clip fixed - I think.
AY registers are now readable
Some very basic analytics are now collected. Each startup, command line options etc. "-analytics" to disable. Please leave it on if you can, as it'll help me direct developement effort.
I have added my new SDCardEditor into the archive. This is very much just a beta, but lets you easy copy files from the SD card. Full editing coming on this.
The latest windows update now causes some nasty stalling. To reduce (but not remove), go into "settings" and search for "game mode" and switch it off. This will help a little.


v2.13.01
--------
Put some guards around break point setting to check ranges a little.
Symbols are uppercased on load (they aren't case sensitive)
Fixed memory window. Any address<$10000 is not a physical address, it's the 64k mapped. If you need this, use bank/offset
Fixed some BASIC key issues - holding down control keys etc
Fixed a ULA global transparancy issue
Fixed NEX loading and initialising of ULA colours
Fixed some Timex rendering issues
Basic CTC timers (4) added. Timer mode only, no cascading. Timers can generate IRQs. Example added to Bundle.
NextReg $CC and $CD - IRQ DMA suspend mode for timers, liner interrupts and ULA added
Z80 CTC Timer example source included in demo

v2.13.00
--------
Fixed a bug in the rewind of MMUs
Swapped to 2.13 coz I was bored of 12.??

v2.12.39
--------
Fixed physical breakpoints in the plugins
(Highly) Experiminetal "rewind" debugger feature. Simply press SHIFT+F7 to step back.
         Currently tracks all RAM access and Sprite port access.
         There's bound to be HEAPs of issues and bugs with this, but for simple debugging, 
         it should be fine.
Added UnStep in plugin system
Added "REWIND" debugger command, to allow you to switch the CPU history on/off dynamically
Added Debugger message display. Now reports errors when you use a non-existant label etc.


v2.12.38
--------
Added NextRegs $2C and $2E (DAC mirrors)
DMA read flags (Bit 5 and Bit 1) added and fixed.
Added "_" to BASIC key detection
I "think" I've fixed the stuck BASIC mode keys (where : just gets stuck and repeats....)
On loading of a NEX file, NextRegs are set to what the OS NexLoad sets


v2.12.37
--------
RAM is now filled with random bytes on power up to help simulate the real machine
-fill=$XXXXX allows you top specify a specific byte sequence to fill RAM with
Debugger: general layout adjustment.
Debugger: text colour changes when user bar over the top for easier reading
Debugger: $ added to all hex numbers
Debugger: Hex numbers are now coloured for easier spotting
Debugger: Added "peek()" of all memory access to the left of the disassembly line
Debugger: Added 16bit "peek()" of all 16bit register load/store locations
Debugger: Added a small permanent memory dump using 16bit registers as the base address
Debugger: ` now displays the current screen in the debugger (Keypad-Enter also works)
Debugger: Memory window bookmarks added.  CTRL+SHIFT+[0-9] to set, CTRL+[0-9] to jump to.
CSpect should now run on 32bit and 64bit machines
Now detects if the shader fails to compile, and switches off the shader mode
Fixed port $123b 16k bank offset mode
Fixed unified attached sprites


v2.12.36
--------
Fixed F_RENAME to use IX instead of HL (now working)
Fixed sprite clipping (I think)
First pass at Tiles and Tilemaps in bank 7

v2.12.35
--------
Faked esxDOS loading now returns an "access denied" error, if it tried to open a file that is write protected
Transparent border now working (ULA off)
Added F_RENAME (untested)

v2.12.34
--------
Fixed HEX editing in the memory window so that it's case insensitive. (don't have to press SHIFT)
ReadMe.txt now holds the "manual" part of this text file, and this is now "just" the version info.

v2.12.33
--------
You can now click on the memory window to edit bytes directly by typing HEX values into it ENTER or click off to stop
You can now press KEYPAD_ENTER to display the game screen while in the debugger

v2.12.32
--------
Fixed reg $8E bit 3 usage - don't change RAM mapping
Fixed Layer 2 palette colour offsets (NextReg $70)
Regs $6E and $6F now return top 2 bits as 0

v2.12.31
--------
Added DAC's B,C and D
Added SAVE to the debugger:  SAVE "NAME",add,len,   SAVE "NAME",BANK:OFFSET,length,    SAVE "NAME",BANK:OFFSET,BANK:OFFSET
You can now read DMA Registers
CTRL+F7 now executes to cursor in the debugger
Added the demo "mod_player.nex" added to #CSpect package

v2.12.30
--------
Layer 2 palette offset added to 256,320 and 640 modes.
Fixed a crash when a write to E3 happens, and the roms haven't been loaded.
Fixed a crash in the debugger when you entered a bank:offset and the offset was an invalid symbol
Tilereg $6E set to $2C on power up - same as hardware. (don't assume though, set it)
Tilereg $6F set to $0C on power up - same as hardware. (don't assume though, set it)

v2.12.29
--------
640x256 Layer 2 mode added

v2.12.28
--------
Fixed DMA prescaler (usually used for digial audio)

v2.12.27
--------
Fixed a crash in AY Audio when loading in large files via fake esxDOS.

v2.12.26
--------
Fixed a crash inside the debugger.
Added a new eDebugCommand.ClearAllBreakpoints to the iCSpect plugin interface

v2.12.25
--------
Fixed Tilemaps being over the border when the border is transparent

v2.12.24
--------
Lower border colour fixed
Added some wait states to slow down 28Mhz mode to more closely match the real machine

v2.12.23
--------
CTRL+F3 (or CTRL+PrintScreen) will now save a screenshot in the current working directory

v2.12.22
--------
Fixed a stupid typo on iCSpect interface to get sprites.

v2.12.21
--------
NextReg 0x1c can now be read
NextRegs 0x61 and 0x62 can now be read correctly
iCSpect memory interface changed to take/return byte arrays
Reading/Setting NextReg 255 (which isn't a real one) was crashing the emulator due to plugins
Fixed the fallback colour, was only 8 bit instead of 9
Fixed reading of the raster line for lower in the screen (lower 64 pixels usually)
Fixed some threading issues in the serial coms (on USB hardware)
Fixed and changed baud rates, and added in all normal ones (HDMI timing = 27000000/baud )  
   2000000 = 13
   1152000 = 23
   921600  = 29
   576000  = 46
   460800  = 58
   256000  = 105
   230400  = 117
   128000  = 210
   115200  = 234
   57600   = 468
   38400   = 703
   31250   = 864
   19200   = 1406
   9600    = 2812
   2400    = 11250
   1200    = 22500

v2.12.20
--------
Removed debug code that could cause a crash on others machines

v2.12.19
--------
Fixed a bug in 48k Layer 2 offset mapping (untested)
Changed set/clear breakpoints to be a proper set/clear

v2.12.18
--------
Fixed Layer 2,320x256 clip window
Fixed a crash in Layer 2, 320x256 rendering
Fixed NextReg0 (machine type) initialisation bug

v2.12.17
--------
1Bit tilemaps now use Global Transparency for it's transparency, not the tile index
Have added GetSprite() and SetSprite() to iCSpect interface for plugin writers


v2.12.16
--------
Reverted .NEX border colour palette change, was just wrong.
Added PeekSprite(address) and PokeSprite(address,value) to iCSpect interface for plugins

v2.12.15
--------
Added plugin "tick" into debugger mode

v2.12.14
--------
Plugin API can now control the debugger using the new extended eDebugCommand enum
-remote command line switch added, to disable the "visible" part of the debugger

v2.12.13
--------
Fixed GetRegister() callback
Fixed NextReg 0x05 reading
Setup some of the Nextreg on reset (also helps reset a bit better)
Fixed bit 3 of new NextReg 0x8E, which fixes dot commands (and sprite editor exiting)

v2.12.12
--------
Changed number of scanlines to 262 (HDMI) for 60Hz

v2.12.11
--------
Fixed a crash in plugin creation

v2.12.10
--------
Added pluging "eAccess.NextReg_Read" type (untested)

v2.12.9
-------
50hz/60hz bit now set in NextReg 5
-debug added to the command line. You can now "start" in the debugger.

v2.12.8
-------
Fixed AY partial port decoding
Fixed a minor reset stall when it was waiting on a HALT before the reset
NextReg 0x8c added
NextReg 0x8e added

v2.12.7 (internal)
-------
Added AltRom1 support

v2.12.6 (internal)
-------
Fixed a serial port "send" bug. Now sends the whole byte
Fixed tile attribute byte bit 7 - top bit of palette offset was being ignored
Fixed esxDOS date/time function (M_GETDATE $8E)
NEX file 1.3 now parsed... should load more things
NEX files get IRQs switched off when loaded (as per machine)
Fixed esxDOS date is wrong
Fixed Border colour now sets the palette entry as well
Fixed GetRegister() in plugins not working
Fixed Copper run then loop not working
Fixed Top line (in 256 pixel high view) is missing
Fixed DI followed by HALT should stop the CPU
Fixed Hires tilemap has clipping on far right
F8 not steps over conditional jumps and branches that go backwards. Branches forwards are taken.
Fixed ADD HL/DE/BC,A no longer affects flags
Fixed OUTI so that B is decemented first. (OTIR was already like that)
Minor change to 60hz audio
NextReg 0x69 can now be read.
DMA Continue mode added
Fixed a timing issue with DMA, so timing much better


v2.12.5
-------
Border now comes from fallback colour if paper/ink mode is 255 (as per hardware)
Fixed Plugin loading. Was broken due to new system loading+resetting.
Added new "Tick" to iPlugin interface, called once per emulated frame
Added Debugger() call to CSpect interface, allowing you to enter the debugger from the emulator

v2.12.4
-------
Fixed memory reading of Layer2 mapping in $2000-$3fff
Fixed MMC path, it was being reset when loading SNA/NEX from the command line.

v2.12.3
-------
Lowres scrolling fixed. 
Added ULA Scrolling registers $26 and $27. 
Fixed HL being set to $10000 after reading a file at the end of memory...
Fixed a command line startup issue when not started in the EXE path

v2.12.2
-------
Changed 320x256 mode to use Y/X orientation (0,0)=$0000, (1,0)=$0100, (2,0)=$0200.  (0,1)=$0001,(0,2)=$0002 etc...

v2.12.1 
-------
Plugin system can now get/set Z80 registers
A better reset on load of an SNA/Nex file. Should be a complete system reset now...
320x256 Layer 2 screen mode added (not tested very well...)
NextReg $70 added ($10=320x256 mode)
NextReg $71 added. MSB of Layer 2 XScroll added
Added Port 0x123B extended memory mapping mode added - using bit 4 to select

v2.12.0
-------
A new plugin system added, so that folk can add their own toys or support custom hardware. See below

v2.11.11
-------
Fixed a crash in 60Hz mode

v2.11.10
-------
added -major and -minor to let you set the CORE version number
added -emu to force the setting of the emulation bit in nextreg 0
added debugger command "nextreg <reg>,<value>" so you can set a next register from the debugger

v2.11.9
-------
Updated audio to be 16bit so DAC isn't squished to oblivion. (should just sound better in general)

v2.11.8 
-------
1bit tilemap fix, when tilemap is already in bank 10 or 11 (untested)

v2.11.7 (internal)
-------
Tilemap clip window right edge fix  - I think.

v2.11.6 (internal)
-------
Coms with the Pi (and it not being there), no longer crashes CSpect.
null comport now returns 0, as per hardware.

v2.11.5 (internal)
-------
Proper 60Hz Layer2 and Sprites now working

v2.11.4 (internal)
-------
Mono "textmode" added
CP/M mode now works

v2.11.3 (internal)
-------
fixed com2 command line parsing and com port initialisation.
Reg $7f now defaults to $FF on power up
When no UART2, now returns $FF
.ROM files (for OS loading) now come from the same path as the IMG file, rather than program folder
fixed com2 command line parsing and com port initialisation.

v2.11.2 (internal)
-------
Fixed "all RAM mode". 2 configurations weren't working right.
Core version number updated to 3.0
-60 now does proper 60hz, including reduced lines and proper 60hz audio *not working fully yet*
-com2=??? added. You can now have a second UART that can be used to send to a real Pi
port 0x153b (bit 6) added to switch UARTs from Wifi to Pi

v2.11.1
-------
Fixed extra pixel in wrapping scroll of ULA
Fixed label on/off
Fixed lowres vertex clip "smear"

v2.11.0
-------
Fixed -tv command line, and made it actually switch off all shader usage
if bit 6 in attrib 3 is not set, #CSpect now properly ignores attribute 4
Copper now runs at 28Mhz
The CPU no longers slows down over the screen
ULA can now scroll in 1/2 pixels
ULA Shadow screen now works with Layer 2
Reg 0x69 added (Layer 2 enable, ULA shadow mirror, and port bits 0-5 goto port 0xFF)
Copper Reg 0x63 added
DMA is now always 14Mhz...
4 bit lowres mode added (reg 0x6A)
Added $123b Read mode 
Added $123b 48K mapping mode 
Reg 7 is now R/W, and bits 4/5 now set correctly
Window regsiters are now R/W


v2.10.1
-------
Fixed a shader crash on OSX (Probably Linux as well)


v2.10.0 (private)
-------
Fixed a crash in relative sprites where the X coordinate could go negative
Added +3 "all ram" mode. (ZX81 games now work on the Next SD card)
ay8912.dll no longer obfuscated. Didn't realise this was still getting obfuscated. This means you can now compile the DLL yourself using the supplied source.
Fixed the fake UART and Wifi - was ignoring a basic AT command. 
Added a couple of new AT commands to the UART. AT+CIPSTA? will now return your IP address.
AT+CIPDNS_CUR? will return googles DNS server - coz why not.
AT+GMR will return n00160901 - which is an older version of the wifi chip I believe - any other preference?
Fixed the default MMC path (when you don't specify one) on the Mac/Linux. Now uses .Net Path.PathSeparator...
Any unknown UART command is now sent to the LOG file
CTRL+F1 now enables/disables the TV shader
PageUp+PageDown now makes the TV lines less/more visible
Home+End now adjusts the TV shader "blur"


v2.9.2
------
Added sprite clipping in over border mode (1 = enabled) (bit 5 of reg $15)
Composite/Unified mode visibility flag fixed
Parallax scrolling demo (and .BAT file to run it) added to CSpect distro.


v2.9.1
------
Fixed a sprite window clipping bug
Fixed the esxDOS streaming API emulation


v2.9.0
------
Improved the timing of the CPU so it should be much closer to the NEXT
48k timing - along with memory contention should also be much closer to the real thing
Fixed the sprite over border clip window - no longer resets the user clip window
Sprite "composite" mode added
Sprite "Unified" mode added
Fixed a screen render issue, where the screen was being stretched 1 pixel too much

v2.8.3
------
Fixed Left control in BASIC key mode.
Fixed a bug where setting port $7ffd or port $1ffd would change the +3 ROM offset - even if next roms weren't enabled.
.NEX files are now started in 14Mhz mode - same as the real machine
Added IFF 1/2 to the debug display
Fixed -fullscreen, just wasn't doing anything....
Fixed -r when you exit in "fullscreen" mode (ALT+ENTER). Now exits fullscreen before quiting
Added a "wish list" to the bottom of this doc.

v2.8.2
------
Right shift now works the same as left shift in BASIC key mode.
Left ALT now releases the mouse, Left and Right Control is now SymbShift.
In BASIC key mode if you also disable escape (-esc), escape will bring up the menu allowing you to quit BASIC/re-number etc.
Fixed a SD card write, now flushes each sector as it writes so that card is always in a complete state


v2.8.1
------
Fixed a crash in SD Card writing.
Added -sd2 for attaching a second SD card
Added a special ZXBASIC keyboard mode, meaning it'll auto map keys to the spectrum version. (" will map to SYM+P for example)
Added PageUp, PageDown, Home &  End to ZXBASIC keyboard mode.
F10 will toggle between game and ZXBASIC keyboard mode
Fixed a bug when setting the sprite index via NextReg and top bit was set, the shap wasn't being offset by $80
Added OpenAL install check for windows, if not found sound is disabled. use -sound to bypass check/error dialog

The lovely guys at SpecNext.com have added "images" of the distro, making SD card usage much simpler.
http://www.zxspectrumnext.online/cspect/

Simply download the one you need.
http://www.zxspectrumnext.online/cspect/cspect-next-16gb.zip
http://www.zxspectrumnext.online/cspect/cspect-next-8gb.zip
http://www.zxspectrumnext.online/cspect/cspect-next-4gb.zip
http://www.zxspectrumnext.online/cspect/cspect-next-2gb.zip
There are also some empty SD card images on the main site that you can put into the second SD card slot,
allowing your work to be separate from the OS (allowing easy upgrading)
In BASIC you can do 'SAVE "d:name.bas"' to save to the second slot....



v2.8.0
------
Fixed -esc command line, hadn't been ported from 1.x version
Swapped Right Shift for SYMSHIFT to Right Control. Both shifts map to CAPS SHIFT.  "," still works as SYMSHIFT
Fixed PUSH XXXX opcode in debugger. Was displaying low/high. Now fixed to display high/low.
Added "-log_cpu" for tracing the CPU instruction stream
Added back in Label "switch" to debugger
Missing "LDWS" opcode added to disassembler
Fixed bug in ULA off mode where the border was still being drawn
Fixed bug in 512 tile mode, where it was always above the ULA screen
Added +3 ROM emulation (without RAM only mode)
Added divMMC ROM/RAM hardware support via port $E3
Added divMMC SD card support via ports $E7 and $EB
SD Card SPI commands supported:CMD0,CMD1,CMD8,CMD9,CMD12,CMD13,CMD16,CMD17,CMD24,CMD55,CMD58,ACMD41
(see SDCARD setup below to get up and running)


V2.7.0
------
Removed debug text output
Initial WiFi/UART support added.
NXtel.nex added to archive - see weblink above for the latest versions.

V2.6.4
------
Fixed Timex Hires mode when using ULANext
Fixed Timex Hires border colour

V2.6.3
------
Fixed sprites crashing when using default transparency
Fixed fallback colour in screen area (I think)

V2.6.2
------
Fixed darkening mode - removed debug code
Fixed sprites being offset by a 1/2 pixel to the left

V2.6.1
------
Fixed new sprite rendering
Fixed Lighten and Darkening modes

V2.6.0
------
Rendering rewrite to properly fix transparancy.

V2.5.1
------
Trying to fix ULA transparancy.

V2.5.0
------
Fixed PUSH $1234 to have the right order.
Fixed LDWS so that flags are set based on the INC D
Fixed BSLA so that it takes bits 4..0 not just bits 3..0
Fixed a global colour transparancy issue

V2.4.6
------
Palette reading added - untested
Fixed a transparency issue with ULA colours

V2.4.5
------
HL now gets set properly after an F_READ (address of next byte)
9 bit Layer 2 colour now compares to Global transparency 8 bits correctly.

V2.4.4
------
Attempt 3 at 9bit colour (3 bit blue)

V2.4.3
------
Fixed a type-o in 9 bit blues

V2.4.2
------
Fixed "HALT" instruction so that it waits for the next IRQ or Reset, and doesn't carry on at VBlank.
9 bit colours (and so 3 bit blues), now use the same colour mapping as Red and Green. 8 Bit colour is as before.

V2.4.1
------
Inital UART spport added via standard windows serial COM ports. Must use "-com" to setup
Fixed the Real Time Clock (RTC) APi... was returing in the wrong order.
Added "fine" seconds control to RTC API. "H" now holds full seconds.

V2.4.0
------
Copper will now trap uninitialised memory when trying to execute a program, and enter the debugger.
Gamepads will now only use the "first" mapped analogue controller. Sorry. Dpad should work fine.
Fixed a bug where creating a new file, then trying to open it would fail.

V2.3.3
------
Fixed 512 tile mode. ULA Disabled bit has moved to Reg 0x68, bit 7.
Border can now be transparent and will use the fallback colour.
NEX format file expanded. Default 16k RAM bank at  $C000 now set.
NEX format file can now set the file handle on request.
Added more window scaling options (-w1 to -w10 now available).
Updated 512 tile mode to use NextReg $6B (bits 0 and 1) properly.
core version now set to 28 (2.0.28)

V2.3.2
------
Screen size changed to 320x256 to allow for full tilemap+sprites display (640x512 actual)
Fixed Tiles under ULA screen when in border area (now also under border). Same as H/W
Added 2 player Joysticks (first pass)
Added MegaDrive joysticks (first pass)


V2.3.1
------
Sprite over border clipping fixed
Sprite over border *2 on coords fixed
Fixed a rasterline reading issue when read at the bottom of the screen.


V2.3.0
------
F_FSTAT($A1) and F_STAT($AC) now implemented again
-fullscreen added to start in fullscreen mode
Fixed loading of NEX files that have pre-set tiles


V2.2.3
------
Minor update for tilemap indexing


V2.2.3
------
Added ULA scrolling using LowRes scroll registers. Note: X currently byte scrolling only.
Added Tilemap screen mode
Added X and Y scrolling to tilemaps
Fixed a couple of bugs in the streaming API.
Fixed USL rendering order - was just buggered. (Layer2 demo was broken)
Added a "-vsync" mode for when using "-60 -sound"

V2.2.2
------
Fixed regs $75-$79 auto inc then top bit of $35 NOT set
Upped sprites to 128 as per new hardware (yum!)

V2.2.1
------
Fixed reg 0x43 bit 7- disable palette auto increment.
Fixed NextReg access for sprites. Was using the wrong index.
Added Auto-increment/port binding for NextReg $35 (sprite number)
Added Auto-increment sprite Next registers $75-$79 (mirrors)
Fixed MMC path setting from the command line


V2.1.4
------
Added logging debug command (see below)
Added Layer 2 pixel priority mode - top bit of second colour palette byte (the single bit of blue) specifies over the top of everything.
Added Next OS streaming API ( see below  )
Added DMA reverse mode (R0 BASE, bit 2)
Added BSLA DE,B  (ED 28)  shift DE left by B places - uses bits 4..0 of B only
Added BSRA DE,B  (ED 28)  arithmetic shift right DE by B places - uses bits 4..0 of B only - bit 15 is replicated to keep sign
Added BSRL DE,B  (ED 2A)  logical shift right DE by B places - uses bits 4..0 of B only
Added BSRF DE,B  (ED 2B)  shift right DE by B places, filling from left with 1s - uses bits 4..0 of B only
Added BRLC DE,B  (ED 2C)  rotate DE left by B places - uses bits 3..0 of B only (to rotate right, use B=16-places)
Added JP (C)     (ED 98)  JP  ( IN(C)*64 + PC&$c000 )
Added new sprite control byte
Added sprite expand on X (16,32,64 or 128)
Added sprite expand on Y (16,32,64 or 128)
Added 16 colour shape mode
Removed 12 sprite limit, limitations still apply when expanding on X (100 16x16s per line max)
Sprite pixel wrapping on X and Y (out one side, back in the other)
Added "lighten" mode.  L2+ULA colours clamped. (selected using SLU layer order of 110)
Added "darken" mode.  L2+ULA-555 colours clamped. (selected using SLU layer order of 111)


V2.1.1
------
Fixed a crash in sprite palettes.

V2.1.0
------
Fixed Create/Truncate on esxDOS emulation
Mouse support added
Gamepads added - not sure about OSX and Linux, but appear fine on Windows.

V2.0.2
------
Ported to C#, OpenTL, OpenGL and OpenAL, now fully cross platform!
Things NOT yet finished/ported.
   Gamepads
   Some esxDOS functions  (F_FSTAT, F_STAT, M_GETDATE)
   128K SNA files are not currently loading
   File dialog (F2) will not work on OSX due to windows Forms not working in x64 mode in mono
   Mouse is not currently implemented
   Due to the way openAL appears to work, things aren't as smooth as i'd like. Disabling audio (-sound) will smooth out movement for now...
   Probably a few more things....



V1.18
-----
added "-16bit" to use only the logical address of the MAP file
Execution Breakpoints are now set in physical address space. A HEX number or SHIFT+F9 will set a logical address breakpoint. This means you can now set breakpoints on code that is not banked in yet.
Next mode enabled when loading a .NEX file


V1.17
-----
ULA colours updated to match new core colours. Bright Magenta no longer transparent by default. Now matches with $E7 (not $E3)
Fixed debugger bug where "0" is just left blank
New MAP format allowing overlays mapped in. Labels in the debugger are now based on physical addresses depending on the MMU
You can now specify a bank+offset in the debuggers memory view (M $00:$0000) to display physical addresses. 
Numeric Keypad added for debugger use.
EQUates are no longer displayed in the debugger, only addresses. This makes the view much cleaner


V1.16
-----
Fixed sprite transparency to use the index before the palette and colour conversion is done
-r on the command line will now allow CSpect to remember the window location, is if you move it somewhere, it'll start up there again next time.
Moved command line options to the top of the file, as no one seems to find them. Keys etc are still below.



V1.15
-----
Fixed sprite transparency index. now reads transparancy colour from sprite palette.
Timex Hi-Colour mode fixed

M_GETDATE added to esxDOS emulation (MSDOS format)
BC = DATE
DE = TIME

Bits	Description
0-4     Day of the month (1–31)
5-8     Month (1 = January, 2 = February, and so on)
9-15    Year offset from 1980 (add 1980 to get actual year)

Bits    Description
0-4     Second divided by 2
5-10    Minute (0–59)
11-15   Hour (0–23 on a 24-hour clock)




V1.14
-----
-joy to disable DirectInput gamepads
Re-added OUTINB instruction (16Ts)
Fixed a but with MMU1 mapping when reading, it was reading using MMU0 instead.
In ZXNext mode, if you have RAM paged in MMU0, then RST8 will be called, and esxDOS not simulated
Palette control registers are now readable (Hires Pawn demo now works)
Reg 0 now returns 10 as Machine ID
Reg 1 now returns 0x1A as core version (1.10)
Layer2 transparancy now checks the final colour, not the index
Fixed sprites in the right border area (the 320x192 picture demo)
Timex Hires colours now correct (Pawn demo)


V1.13.2
-------
Fixed CPU on WRITE and on READ breakpoints
-port1f command line removed
.NEX format now leaves IRQs enabled
Removed some of the old opcodes from the debugger
Kempston joystick emulation added using direct input. All controllers map to a single port, port $001F = %000FUDLR
Fixed memory contention disable (so now tested!)


V1.12.1
-------
Added .NEX format loading. (see format below)
Added nextreg 8, bit 6 - set to disable memory contention. (untested)
Added Specdrum Nextreg mirror ($2D)
Removed OUTINB
Removed MIRROR DE
Added sprite global transparancy register ($4B) - $e3 by default, same as global transparancy ($14).
NextReg reg,val timing changed to 20T
NextReg reg,a timing changed to 17T
Added LDWS instruction (might change)


V1.11
-----
Fixed Lowres window (right edge)
You can now use long filenames in  RST $08 commands (as per NextOS), can be set back to 8.3 via command line
Layer 2 now defaults to banks 9 and 12 as per NextOS
Added command line option to retrun $FF from port $1f
Fixed a possible issue in loading 128K SNA files. Last entry in stack (SP) was being wiped - this may have been pointing to ROM....
Fixed mouse buttons return value (bit 0 for button 1, bit 1 for button 2)


V1.10
-----
-cur to map cursor keys to 6789 (l/r/d/u)
Fixed copper instruction order
Copper fixed - and confirmed working. (changes are only visible on next line)
Copper increased to 2K - 1024 instructions
Fixed a bug in the AY emulation (updated source included)
Fixed Lowres colour palette selection
Added new "Beast" demo+source to the package to show off the copper


V1.09
-----
Layer 2 is now disabled if "shadow" screen is active  (bit 3 of port $7FFD)
Timex mode second ULA screen added (via port $FF bit 0 = 0 or 1). Second screen at $6000.
Fixed bit ?,(ix+*) type instructions in the disassembler. All $DD,$CB and $FD,$CB prefix instructions.


V1.08
-----
$123b is now readable
Fixed cursor disappearing


V1.07
-----
"Trace" text was still being drawn when window is too small.
"POKE"  debugger command added
New timings added to enhanced instructions - see below.


V1.06
-----
Border colour should now work again.... (palette paper offsets shifted)


V1.05
-----
Minor update to fix port $303b. If value is >63, it now writes 0 instead (as per the hardware)


V1.04
-----
Palettes now tested and working


V1.03
-----
Missing ay.dll from archive


V1.02
-----
Quick fix for ULA clip window


V1.01
----
Fixed a bug in delete key in debugger not working
Fixed Raster line IRQ so they now match the hardware
Fixed a bug in 128K SNA file loading
Fixed a bug in moving the memory window around using SHIFT key(s)
Removed SID support  :(
Added auto speed throttling.  While rendering the screen, if the speed is over 7Mhz, it will drop to 7Mhz. (*approximated)
Removed extra CPU instructions which are now defuct. (final list below)
MUL is now D*E=DE (8x8 bit = 16bit)
Current Next reg (via port $243b is now shown) in debugger
Current 8K MMU banks are now shown in debugger
CPU TRACE added to debugger view (see keys below) ( only when in 4x screen size mode)
Copper support added. Note: unlike hardware, changes will happen NEXT scanline.
Sprite Clip Window support added (Reg 25)
Layer 2 Clip Window support added (Reg 24)
ULA Clip Window support added (Reg 24)
LOWRES Clip Window support added (Reg 24)
Layer 2 2x palettes added
Sprite 2x palettes added
ULA 2x palettes added
Regiuster $243b is now readable

NOTE: SNASM now requires "opt ZXNEXTREG" to enable the "NextReg" opcode




V1.00
----
Startup and shut down crash should be fixed
You can now use register names in the debugger evaluation  ("M HL" instead of "M $1234", "BC HL" etc.)
G <val/reg/sym> to disassemble from address
-sound to disable audio
Timing fixed when no sound active.
-resid to enable loading and using of the reSID DLL. Note: not working yet - feel free to try and fix it! :)
-exit  to enable "EXIT" opcode of "DD 00"
-brk   to enable "BREAK" opcode of "DD 01"
-esc   to disable ESCAPE exit key (use exit opcode, close button or ALT+F4 to exit)
Fixed the Kempston Mouse interface, now works like the hardware.
Next registers are now readable (as per hardware)
local labels beginning with ! or . will now be stripped properly
Pressing CONTROL will release the mouse
Right shift is now also "Symbol shift"
3xAY audio added - many thanks to Matt Westcott (gasman)  https://github.com/gasman/libayemu
Timex Hicolour added
Timex Hires added
Lowest bit og BLUE can now be set
SHIFT+ENTER will set the PC to the current "user bar" address
Raster interrupts via Next registers $22 and $23
MMU memory mapping via NextReg $50 to $57
Added 3xAY demo by Purple Motion.
Source for ay.dll and resid.dll included (feel free to fix reSID.DLL!)
You can now specify the window size with -w1, -w2, -w3 and -w4(default). If winow is less than 3x then the debugger is not available
Cursor keys are now mapped to 5678 (ZX spectrum cursor)
Backspace now maps to LeftShift+0 (delete)
DMA now available! Simple block transfer (memory to memory, memory to port, port to memory)
SpecDrum sample interface included. Port $ffdf takes an 8 bit signed value and is output to audio. (not really tested)
Added the lowres demo (press 1+2 to switch demo)
Updated Mouse demo and added Raster Interrupts
Added DMA demo
Added 3xAY music demo


V0.9
----
register 20 ($14) Global transparancy colour added (defaults to $e3)
regisrer 7 Turbo mode selection implemented. 
Fixed 28Mhz to 14,7,3.5 transition. 
ULANext mode updated to new spec  (see https://www.specnext.com/tbblue-io-port-system/)
LDIRSCALE added
LDPIRX added


V0.8
----
New Lowres layer support added (details below)
ULANext palette support added (details below)
TEST $XX opcode fixed



V0.7
----
port $0057 and  $005b are now $xx57 and $xx5b, as per the hardware
Fixed some sprite rotation and flipping
Can now save via RST $08  (see layer 2 demo)
Some additions to SNasm (savebin, savesna, can now use : to seperate asm lines etc)


V0.6
----
Swapped HLDE to DEHL to aid C compilers
ACC32 changed to A32
TEST $00 added


V0.5
----
Added in lots more new Z80 opcodes (see below)
128 SNA snapshots can now be loaded properly
Shadow screen (held in bank 7) can now be used


V0.4
----
New debugger!!!  F1 will enter/exit the debugger
Sprite shape port has changed (as per spec) from  $55 to $5B
Loading files from RST $08 require the drive to be set (or gotten) properly - as per actual machines. 
  RST $08/$89 will return the drive needed. 
  Please see the example filesystem.asm for this.
  You can also pass in '*' or '$' to set the current drive to be system or default
Basic Audio now added (beeper)
New sprite priorities using register 21. Bits 4,3,2
New Layer 2 double buffering via Reg 18,Reg 19 and bit 3 of port $123b

