Version 2.44
Unix Frotz and Dumb Frotz are tested and known to work well.  DOS Frotz
has been tested really on just DOSbox.  I posted to a few places asking
for people to test DOS Frotz on real hardware.  So far, only one person
replied.  The test machine was a 486DX4 running at 75 Mhz with 24M of
RAM and no sound card.  It crashes horrible after three but less than
ten moves.  Test game is LostPig.z8.  The computer's display was
photographed and sent to me.  I'll release this now and just accept that
the DOS port is bad for now.

>go west
Grunk no allowed in field. That probably OK, because Grunk no think pig
tall
enought to climb over wall.

>look around
Grunk not see that there.

>find the goddam pig
Grunk no know where that at.

>lol
Grunk not know what that mean.

>go east
Forest look dark. Pig probably some place in there, but Grunk not know
which way
to go. Not want end up lost in forest with no pig.

>go west
        dos mem corrupt, first_mcb=0277
prev 0899:0000|4D 9A 08 80 64 E9 91 03 46 52 4F 54 5A 00 00 M?.?d??.FROTZ...
notM26D1A:0000|58 60 1D EA 23 25 FC A5 7B 54 1E 70 23 f2 6B X`..?#%??{T.p#?k

PANIC: before 4a: MCB chain corrupted
System halted

Version 2.50

This release includes Unix Frotz, Dumb Frotz, SDL Frotz, and DOS Frotz.
All have been tested and appear to be working correctly.  With DOS Frotz
in particular, had longstanding problems with integer overflows.  These
are fixed now.  Unix Frotz's audio subsystem was revised by Mark
McCurry.  SDL Frotz finally corrects for adaptive palette images.

Major changes coming up:

* Add compile-time option for paging Zcode from disk instead of reading
  the whole thing into memory.  This will allow for better perfomance on
  low-memory machines.

* Port Frotz to the PDP-10 mainframe and maybe PDP-11.  Contingent on
  disk-paging.

* Create a new GTK3 user interface to resemble the interface of Windows
  Frotz.

* Add language internationalization.

Minor changes coming up:

* Better control over row and column count for the SDL interface.

* Preserve aspect ration when resizing SDL window.

Things seem to work well for DOS and Unix (Linux, MacOS, and *BSD).

Things look good for the second beta test.

Things look good for the third beta test.

Version 2.51

This is a minor release focusing on minor enhancements and bug fixes.

NEW FEATURES

- Added an -f option for Dumb Frotz to mark up the output with color and
  formatting codes.  Currently "irc", "ansi", and "normal" modes are
  supported.

BUG FIXES

- Cleanly account for some installations of ncurses which have the
  library split into ncurses (high level) and tinfo (low level).

- Added an idiosyncrasy fix for Cutthroats, which assumes a
  quick-and-dirty conversion of 24-hour notation to am/pm notation.

- Fixed where the Makefile used spaces instead of a tab in a rarely-used
  recipe.

- Fixed a memory allocation problem with restoring a game at the command
  line using the -L option.

- Fixed an oversight in which curses wasn't being shut down properly
  when fatal zcode errors were encountered.

Summary of changes between Frotz 2.51 and Frotz 2.52:
=====================================================

Frotz 2.52 was released on Sunday May 10, 2020.

This is a minor release focusing on minor enhancements and bug fixes.

NEW FEATURES

- Partial support for new @set_true_colour opcode.  Works for SDL.
  Doesn't work all the way for curses.  Not in scope for dumb interface.

BUG FIXES

- Reworked Makefiles to better handle library detection, particularly
  for macOS.

- Fixed rendering of non-paletted PNG images.  Affected only non-Infocom
  V6 games.

- Rolled back idiosyncrasy fix for Cutthroats and changed over to the
  quick-and-dirty 24-to-12 conversion used by Infocom as this is how the
  Imps expected an interpreter to behave.

- Fixed broken handling of game paths set in environmental variables and
  in config files.

- Fixed slightly broken parsing of .sfrotzrc.

- Fixed behavior of command line processing inconsistent between the
  different user interfaces.

- Assorted source code formatting fixes.

Summary of changes between Frotz 2.52 and Frotz 2.53:
=====================================================

Frotz 2.53 was released on Saturday February 27, 2021.

This is a minor release focusing on minor enhancements and bug fixes.

NEW FEATURES

- -E option to choose how emphasised text is rendered.

- X11 interface has been added as a compile target.

- Added new default TrueType font for sfrotz.

- Automatically select the appropriate interpreter number for V6 games.

- Limited mouse support for curses interface.

BUG FIXES

- Corrected potential trouble with garbage in filenames for SDL
  interface.

- Corrected a problem wherein @print_table would sometimes print garbage.

- Fixed a segfault problem when input buffers are abused.

- Double-clicks are now recognized in sfrotz and xfrotz.

- Fixed problem with spurious newline when a space triggers a word wrap.

- Fixed a problem with UTF-8 characters getting corrupted during line
  editing.

- Fixed some problems with V3 games scribbling on the status line in
  certain circumstances.

- Removed pre-C99 idioms and C++ comments in curses and core to benefit
  older compilers.  X11 is still pre-C99 clean.  SDL interface is not
  pre-C99-clean due to libSDL2 not being pre-C99-clean.

- Fixed a problem with the -x flag not properly expanding commands for
  some Infocom games.

Summary of changes between Frotz 2.53 and Frotz 2.54:
=====================================================

Frotz 2.54 was released on Wednesday April 13, 2022.

This release's main attractions are official support for TOPS20 and
cross-compilation to DOS.

NEW FEATURES

- Added changes to allow for compilation on a DEC PDP-10 mainframe
  running TOPS20.  See INSTALL_PDP10.

- Added a means to cross-compile to DOS by way of Open Watcom C version
  2 and later.  See INSTALL_DOS.

- Added a quiet mode to dumb interface to quell startup messages.

BUG FIXES

- Fixed several problems with compilation under macOS.

- Fixed wrong glyphs in DOS Frotz's Amiga font mode.  1/2 and 1/4 were
  there instead of the oe and OE ligatures.

- Fixed a failure of the -q flag to actually silence sound effects.

- Fixed an oversight in SDL Frotz that prevented some sounds from
  playing in Lurking Horror.

- Made the dumb and curses interfaces read the resolution chunk from
  Blorb files.  Previously they would assume a resolution of 320x200.