rather then forcing applications to set this to a single bitmap. this
results in much nicer looking secret doors that don't randomly flip
bitmaps at all during and after opening.
fixes secret door bitmaps seeming to switch around randomly before
coming to a stop. they still will switch once after opening, but it will
now only switch to the expected bitmap.
these were on the book cd under /ACK/DOS/BORLAND. this version of
ackiff.c is SIGNIFICANTLY faster then the windows one ported back to dos
(i don't think i did anything wrong when i did that, but who knows...)
despite the book itself stating that this code was not included due
to the old GIF patent back in the 90's, it was actually included on the
cd under /ACK/DOS/WATCOM/ACK_LIB. oops!
borland conditionals have been removed. asm sources converted fully
to tasm ideal mode. keyboard and timer interrupt handlers moved to c
code copied from fdemo watcom sources
sources taken from book CD:
ack_lib -> /ACK/WIN/ACK_LIB
fdemo -> /ACK/DOS/FDEMO/SOURCE (and /ACK/DOS/BORLAND as needed)
mall -> /ACK/DOS/MALL/SOURCE (and /ACK/DOS/BORLAND as needed)
some source files were missing for the demo projects and needed to be
copied from /ACK/DOS/BORLAND (as indicated above)