CHANGELOG

Changelog

2009-02-06: v1.0

 * Initial version uploaded to CSDB.

2011-08-08: v1.1

 * Added experimental sid module.
 * Added hide.
 * Removed land.
 * Bugfixed not, invert, c@.
 * Assembler: Added lbl, -branch, :asmsub, ;asmsub
 * Editor
   - Renamed edit => vi.
   - Renamed 0: => g
   - Speed-ups, bug-fixes

2012-08-07: v1.2

 * Added hi-res graphics module.
 * Added sinus/cosinus module.
 * Added 2*, 2/, s<, s>, abs, negate, 0<, d*.
 * Assembler: Added :+, :-, +branch
 * Bugfix s" - now it behaves the same in compile and immediate mode.
 * Removed cells, 0>, write, char.
 * Updated documentation.
 * Made "load" load byte-by-byte again.
 * Added hexdec, ls modules by Kevin Reno.
 * Various bugfixes and optimizations.

2012-10-14: v1.21

 * Handle failed compiles better. Now it will not be necessary to
   reboot computer that often.
 * Editor:
	- After pressing F7 to compile & run, Restore brings you back to editor.
	- "vi" with empty stack now starts editor with empty buffer.
	- Added yy command.
	- Various bugfixes.
 * Bugfix text, ldx,
 * Rename jsr-wrap to jsr
 * Added 100/.
 * Change blkcol to take column, row instead of x, y.
 * Updated documentation.

2012-11-01: v1.22

 - Bugfixed erase, see
 - Removed 2swap, number
 - Moved editor buffer from 5000 to 6000, giving more space for code
 - Make "fg" fail if editor buffer has been overwritten by code
 - Improved border flashing + cursor blinking during compile
 - Improved error handling further
 - Minor optimizations

2012-11-25: v1.23

 * Some pretty good speed and size optimizations.
 * Removed rdrop.

2013-06-22: v1.24

 * Added create/does>
 * Removed fg word - just use vi
 * Renamed dec to decimal
 * Make c. add trailing space
 * Split up ." in ." (compile-time) and .( (run-time)
 * Various small improvements

2013-07-22: v1.25

 * math: added um/mod, */, */mod
 * loops: added do, loop, +loop, i, j
 * interpreter: make key up recall previous line entered
 * bugfixed r@
 * dropped "not" word - replaced by 0=
 * rearranged zeropage usage so that parameter stack is a bit bigger
 * documented layout of forth words
 * bugfixed docs: invert, not "not", flips all bits
 * added "bl" word (for space)

2014-03-15: v1.26

 * Improved line buffering, removed "linebuf"
 * Added assembler labels
 * Added "base", "hex", "decimal"
 * Renamed "exec" => "execute"
 * Added "[char]"
 * Added some support for floating point values (float.fs)
 * Removed "?immed"
 * Made "words" pause when screen is full
 * Added "lshift", "rshift"
 * Added demo how to modify character ROM
 * Optimizations, bugfixes, more documentation

2014-03-30: v1.27

 * "forget" did not handle missing word
 * factor "more" to separate word
 * improve seeing of do..loop

2014-03-31: v1.28

 * Improved documentation, describe demos and fix some
   error in tutorial.
 * Bugfixed some demos.

2014-04-16: v1.3

 * Music Macro Language (MML) support!
 * Renamed some assembly mnemonics.
    asla, lsra, rora, rola,  =>
    asl,a lsr,a ror,a rol,a
 * Allow strings longer than 256 bytes.
 * Optimized jsr. (Thanks to Kevin Lee Reno!)

2014-04-20: v1.31

 * changed ' ['] to be according to standard
 * re-add sid.fs, which contains SID manipulation words
 * bugfix . in mml player

2015-03-27: v1.32

 * switched to dual parameter stack that is split up in MSB/LSB sections.
   this is a nice optimization!
 * optimized "branch"
 * renamed "var" to "variable"
 * added "depth" (gives depth of parameter stack)
 * added "sp0" (bottom address of LSB parameter stack)
 * added "sp1" (bottom address of MSB parameter stack)
 * removed "sp@"
 * bugfixed & optimized "ls"
 * moved zptmp, zptmp2, zptmp3 and ip to new locations

2015-06-24: v1.33

 * editor: changed half-page scrolling from U/D to CTRL+u/d
 * editor: many bugfixes and optimizations
 * forth: many small optimizations
 * forth: made cmove> ANS Forth compliant
 * doc: updated memory map documentation

2015-08-08: v1.4

 * forth: durexForth is now subroutine threaded instead
   of direct threaded. This gives a huge speed improvement,
   at the cost of increased RAM usage.
 * forth: added "compile," word.
 * disk: improved EOF handling.
 * editor: bugfixed CTRL+u/d.
 * editor: bugfix: "fg" was by mistake hidden.
 * doc: added inline assembly example.
 * doc: bugfixed turtle graphics demo.

2015-08-13: v1.4.1

 * forth: added tail call elimination, i.e., the practice of replacing
   jsr/rts with jmp. words that should not be subject to tail call
   elimination must be tagged with "no-tce".
 * forth: renamed jsr => sys
 * forth: renamed immed => immediate
 * forth: added postpone
 * forth: removed [compile]
 * forth: inline drop, 2drop

2015-10-30: v1.4.2

 * renamed EOL comment # to \ (PC) or £ (C64)
 * renamed :asm => code
 * renamed ;asm => ;code
 * renamed tell => type
 * disabled tail call elimination for s" : ]
 * minor optimizations

2015-11-01: v1.4.3

 * forth: made +loop work like it should
 * forth: removed <=, >=
 * forth: renamed <, > to u<, u>
 * forth: renamed s<, s> to <, >
 * forth: renamed d* to um*
 * forth: optimized loop, r>, >r, r@, i
 * forth: disabled tail call elimination for (
 * editor: faster key delay+repeat
 * editor: hid fg
 * editor: various bugfixes
 * doc: documented min, max, within

2015-11-12: v1.4.4

 * forth: added u. unloop leave cell+ cells page key?
 * forth: allow input of negative numbers
 * forth: optimized cmove, cmove>
 * forth: made . print signed numbers
 * forth: various bugfixes
 * doc: simplified & improved intro + tutorial
 * editor: bugfix, exiting editor disabled key repeat

Thanks to Christian Johansson and polluks for bug reports!

2015-12-23: v1.4.5

 * forth: / now uses floored signed division
 * forth: bugfix for negative number parsing (2- was
   interpreted as -20)
 * forth: made 2/ sign-extend negative numbers
 * forth: added spaces source >in 2over 2swap m+ m*
   sm/rem fm/mod dabs dnegate s>d
 * forth: changed word order of double-cell integers
 * editor: backspace on start of line now doesn't join lines
 * doc: mention in tutorial that default is hexadecimal

Thanks to Christian Johansson and polluks for suggestions!

2015-12-30: v1.4.6

 * bugfix: disabled tail call elimination for literal ['] [char]
           to avoid some crashes
 * bugfix: <, rshift, u. did not support negative numbers
 * forth: made word finding + numbers case insensitive
 * forth: renamed char to getc, and added a new char that works
          according to the Forth 2012 standard.
 * forth: added abort, abort", 2@, 2!, char+, chars, align, aligned
 * forth: key, key? now work only with keyboard
 * forth: made quit reset input and fall back to keyboard
 * forth: fill ( ch addr len ) changed to fill ( addr len ch )
 * forth: allot ( -- n ) changed to allot ( -- )
 * forth: made base a variable instead of a value
 * forth: changed variable; data field is now after code field

Thanks to Christian Johansson for suggestions!

2016-01-04: v1.5.0 - Forth 2012 core standard compliant!

 * forth: made +loop work according to standard
 * forth: added support for #, $, %, char parsing.
          e.g. #123, $d020, %1001001, 'z'
 * forth: ' now aborts if it does not find a word
 * forth: made "type" disable c64 quote mode (fixes "words")
 * forth: state ( -- flag ) changed to state ( -- addr )
 * forth: added count, >body, <#, #>, hold, sign, #, #s, >number, move,
          accept
 * forth: removed hide, hide-to, hidden, forget, scratch, cmove, cmove>
 * forth: fixed yet another tail call elimination crash
 * forth: made while/repeat implementation conform to standard
 * forth: made word conform to standard
 * forth: made "immediate", "no-tce" non-immediate
 * forth: made sure immediate does not toggle

Thanks to polluks for suggestions!

2016-01-10: v1.5.1 - bugfix & improvements

 * bugfix: evaluate and vi F7 didn't work for multi-line buffers
 * bugfix: see did not work on the latest word
 * bugfix: e.g. 'A' was parsed as 'a'
 * bugfix: case insensitivity did not work for z/Z
 * editor: use fg to bring back editor instead of RESTORE
 * disk: added include (e.g. "include gfx" loads gfx module)
 * disk: added device ( device# -- ) to switch active device
 * disk: renamed load => included
 * forth: added marker
 * forth: made dump work in decimal mode
 * forth: made .( immediate
 * forth: removed no-tce
 * forth: bring back modules

2016-01-16: v1.5.2

 * bugfix: find now handles the empty string correctly
 * bugfix: editor didn't work correctly with big files (over $1000 bytes)
 * forth: the interpreter now prints "ok" after interpreting
 * forth: abort" now inverts the text
 * editor: open files with 'vi file' instead of 's" file" vi'
 * editor: no longer possible to join lines by shift+backspace
   in insert mode

2016-01-20: v1.5.3

 * bugfix: various fixes for evaluate/vi F7

2016-01-30: v1.5.4

 * bugfix: vi :w didn't work with filenames longer than 6 characters
 * bugfix: vi :w! captured control characters in filename
 * bugfix: changed vi :w to avoid 1541 bugs
 * editor: improved feedback when saving
 * editor: stop using backup files
 * forth: added require, required
 * doc: documented assembler, sid

2016-02-02: v1.6.0 - cartridge support!

 * forth: now available as a 16 kB cartridge image. the cartridge
   has the same functionality as the disk version, but boots faster.
 * forth: removed gfx from standard modules
 * forth: dropped all usage of BASIC (including float module)
 * forth: moved rarely used words to compat module
 * asm: renamed zptmp zptmp2 zptmp3 => w w2 w3
 * asm: renamed sp0 sp1 => lsb msb
 * gfx: moved bitmap graphics area from $8c00-$8fff, $a000-$bfff
   to $cc00-$cfff, $e000-$ffff
 * doc: expanded assembler documentation
 * editor: removed fg

2016-02-10: v1.6.1

 * forth: evaluate failed for strings that ended at page boundary
 * forth: print error in case include fails
 * forth: space optimize of
 * forth: moved 2over, 2swap to compat
 * cart: made cartridge boot faster
 * cart: use Simons' Basic cart type to make $a000-$bfff RAM
 * editor: starting without filename now doesn't read from disk
 * editor: :w on unnamed buffer now prints "no filename"

2017-08-03: v1.6.2

 * forth: various see improvements
 * forth: moved >body to compat

2017-10-07: v1.6.3

 * bring back float module

2018-04-22: v1.6.4

 * forth: INCLUDED now interprets the file
 * forth: added ?DO
 * forth: added DEFER DEFER! IS to compat
 * forth: made loadb return address after last written byte
 * debug: made see show branch

2018-10-24: v1.6.5

 * editor: fixed dd crash at end of buffer
 * editor: slower key repeat settings
 * editor: made f7 work in insert mode

2019-05-12: v1.6.6

[Changed]
 * sprite: sp-data now use . instead of bl to set 0 bits
 * forth: accept now reads keyboard only
[Fixed]
 * sprite: sp-on, sp-off had inverted sprite number
 * gfx: text now supports upper/lower case

2019-05-20: v1.6.7

[Fixed]
 * include, included would clobber the text input buffer.

2019-05-22: v1.6.8

[Changed]
 * when parsing, treat shift+space like space. it used to
   be like this but accidentally (?) changed in 1.6.0.