Version 0.8 alpha 1 - 24-Sep-2026:
 - Added support for console I/O to graphics windows:
     OPTION CONSOLE BOTH ' or OPTION CONSOLE SCREEN
     GRAPHICS WINDOW 0, 300, 300
     GRAPHICS WRITE 0
     PRINT "Hello World"
     - Enabled automatically for simulated platforms where appropriate.
 - Added simulation of additional platforms:
     - PicoMiteHDMI
     - PicoMiteVGAUSB
     - PicoCalc
 - Added internal editor ported/rewritten from PicoMite:
     - Do a single edit using the internal editor:
         EDIT INTERNAL "helloworld.bas"
     - Do a persisted switch to the internal editor:
         OPTION EDITOR INTERNAL
     - ** Still has some bugs that need ironing out. **
     - ** Not feature-complete c.f. very latest PicoMite editor. **
 - Added BLIT RESIZE command:
     BLIT RESIZE src_id, dst_id, sx, sy, sw, sh, dx, dy, dw, dh [, transparent]
 - Added BREAKPOINT command to assist debugging the interpreter:
     BREAKPOINT
     - Placing a BREAKPOINT statement in an MMBasic program gives a developer
       a named, stable symbol at which a gdb breakpoint can be set, allowing
       execution to be paused at a precise MMBasic line.
 - Added DEVICE GAMEPAD sub-commands:
     DEVICE GAMEPAD INTERRUPT ENABLE id, interrupt [, bitmask]
     DEVICE GAMEPAD INTERRUPT DISABLE id
     DEVICE GAMEPAD LED id, red, green, blue
     DEVICE GAMEPAD RUMBLE id [, low_freq] [, high_freq] [, duration_ms]
     DEVICE GAMEPAD RUMBLE id, OFF
     DEVICE GAMEPAD RUMBLE TRIGGERS id [, left] [, right] [, duration_ms]
     DEVICE GAMEPAD RUMBLE TRIGGERS id, OFF
     - LED and RUMBLE TRIGGERS are currently untested as I don't have
       compatible hardware.
     - Note: DEVICE GAMEPAD VIBRATE has been renamed to DEVICE GAMEPAD RUMBLE.
 - Added DRIVE command as no-op for PicoMite simulation.
 - Added IN and OUT commands as no-op for PicoMite simulation:
     - On the PicoMite these are used with the PIO.
     - Having them in MMB4L, even if they don't do anything, prevents IN and
       OUT being used as variable names in programs intended to also run on
       the PicoMite.
 - Added LIST VARS command:
     LIST VARIABLES [ALL|GLOBAL|LOCAL|level%]
 - Added LOAD JPG command:
     LOAD JPG file$ [, x] [, y] [, mode] [, ximage] [, yimage]
 - Added LOG command:
     LOG [ DEBUG | INFO | WARNING | ERROR | FATAL ]? expression ...
     - See further description of logging support below.
 - Added MKFILE command for creating an empty file:
     MKFILE filename$
     - Helpful for testing, limited use in production.
 - Added OPTION KEYBOARD command as no-op for PicoMite simulation.
 - Added OPTION LOG command:
     OPTION LOG [ NONE | DEBUG | INFO | WARNING | ERROR ]
     - See further description of logging support below.
 - Added SAVE IMAGE command for saving .bmp files:
     SAVE [COMPRESSED|IMAGE|1BPP|24BPP|32BPP|RGB121|RGB121_RLE4|RGB222|
         RGB222_RLE8|RGB332|RGB332_RLE8|RGB555|RGB565] file$ [, x, y, w, h]
 - Added SAVE JPG command:
     SAVE JPG file$ [, x, y, w, h]
 - Added SETTICK PAUSE and SETTICK RESUME commands.
 - Added SPRITE LOADARRAY command:
     SPRITE LOADARRAY [#]id, w, h, array%()
 - Added ATAN2() function.
 - Added KEYDOWN() function for PicoMiteVGA + PicoMiteHDMI:
     - Available for all simulated platforms except Game*Mite and PicoCalc.
 - Added MM.INFO(FONT), MM.INFO(BCOLOUR), MM.INFO(FCOLOUR) functions.
 - Added PIXEL() function.
 - Added support for long lines, i.e. greater than console width, at prompt.
 - Added logging support to assist debugging the interpreter:
     - Writes "mmb4l.log" to directory in which MMB4L is started.
     - Set initial log level at command line with:
         --log [ none | debug | info | warning | error ]
     - Set via non-persistent option from within MMB4L:
         OPTION LOG [ NONE | DENUG | INFO | WARNING | ERROR ]
     - Write directly to the log:
         LOG [ DEBUG | INFO | WARNING | ERROR | FATAL ]? expression ...
 - Added support for 2nd FRAMEBUFFER to PicoMite simulation.
 - Added support for Fonts 8 and 9 from PicoMite.
 - Added BYVAL and BYREF keywords.
 - Added support for ANSI default terminal colour.
 - Added support for reading stdin from pipe or redirected input.
 - Added support for multibyte function tokens:
     - Removes the previous limit of 127/128 function tokens.
 - Added support for specifying a platform to simulate on the command line:
     RUN [filename$] [, cmdargs$] [AS {<device> | device$}]
     - e.g. RUN "foo.bas", "wombat" AS CMM2
     - Also via the * command, e.g. *CMM2 foo --wom --bat
     - If a platform is supplied at the command line then it is used as the
       default returned to by the NEW and RUN commands.
 - Added character coordinate variants of MM.INFO(HPOS|VPOS|HRES|VRES) and
   PRINT @:
       MM.INFO(HPOS C), MM.INFO(VPOS C), MM.INFO(HRES C), MM.INFO(VRES C)
       PRINT @C(x, y) "Hello World"
 - Added SETENV name$ = value$ as synonym for SYSTEM SETENV.
 - Added prompt history saved and restored to/from file.
 - Removed OPTION RESOLUTION command:
   - Replaced with explicit character coordinate variants of
     MM.INFO(HPOS|VPOS|HRES|VRES) and PRINT @; see above.
 - Changed FILES command to be reimplemented PicoMite-alike instead of
   delegating to operating-system 'ls'.
 - Changed MEMORY report to show used vs. available function and variable
   slots, and renamed "General RAM" to "Heap".
 - Changed termgfx cursor to use cell inversion instead of a flashing
   underline for improved visibility.
 - Changed platform switching: NEW and RUN no longer destroy graphics
   surfaces unless the platform is actually switched.
 - Changed EOF() behaviour to match PicoMite.
 - Changed CMM2 simulation: colour depth of 8 or 16 now treated as 32 in
   MODE command.
 - Changed MM.INFO(HRES|VRES) so they are disallowed for simulated platforms.
 - Changed SDL event polling to occur every 5ms rather than continuously:
     - Excessive polling was a major performance bottleneck.
 - Changed STDIN reading to use a worker thread:
     - The principal reason for this is that on Windows reading from STDIN
       is very slow.
 - Fixed bug in SDL audio buffering. Callback now processes full stereo frames
   instead of assuming a 1-sample buffer which reduces underruns and the
   crackling and popping in the sound that they were causing.
 - Fixed bug in single-line IF <expr> THEN <stmt1> ELSE <stmt2>:
     - Was broken if <stmt1> began with a command whose command token id was
       equal to ELSE's function token id.
 - Fixed bug where DefinedSubFun did not restore state when throwing an error.
 - Fixed bug where BLIT had edge condition errors with horizontal and vertical
   flip.
 - Fixed bug where block drawing characters in FONT 4 were incorrect.
 - Fixed bug where INC/CAT did not respect string array element length.
 - Fixed bug where SDL was not properly cleaned up on exit.
 - Fixed bug where display was not updated until the first button press on
   the R36S (dirty flag not set on SDL_WINDOWEVENT_SHOWN).
 - Fixed bug where gamepad struct id was 0 after gamepad_close().
 - Fixed bug where Mstrcpy() would segfault when src == NULL.
 - Fixed bug where MATH function complex number support used incorrect return
   type (test suite contributed by Peter Mather).
 - Fixed bug where INPUT$ returned no error given an invalid file number.
 - Fixed bug where temporary buffers were not released during SELECT/CASE
   processing.
 - Fixed bug where all files were not closed when program_process_file()
   exited.
 - Fixed bug where saving options to a directory instead of a file did not
   return an error.
 - Fixed bug where trailing separator was not stripped in file_getcwd() and
   file_get_home().
 - Fixed bug where audio track current used unsigned type with -1 sentinel.
 - Fixed bug where popen() output was not trimmed of leading/trailing
   whitespace.
 - Fixed bug where --version command-line option did not work correctly.
 - Fixed bug where console carriage-return was not handled correctly.
 - Fixed bug where backspace in the first column would move the cursor up
   in termgfx.
 - Fixed bug with [Delete] key behaviour in termgfx.
 - Fixed bug where show/hide cursor was not correct in MMgetchar().
 - Fixed bug where memory was not allocated for return values from
   MM.INFO(CPUSPEED), MM.INFO(CPUTIME) and MM.INFO(DRIVE)
     - Fix by @TomSchimana.
 - Fixed various uninitialised local variables reported by MSVC.
 - Fixed codepage pointer dereferencing for output.