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World of Shareware - Software Farm 2
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README.TXT
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1993-01-08
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-------- WHATS NEW IN TIF256 GRAPHICS LIBRARY EXTENSION V1.0b ---------
The library files distributed for version 1.0b are exactly the same ones
distributed for version 1.0. The difference is that the TIF_DEMO.C,
TIF_DEMO.EXE, and TIF_DATA.EXE files reflect changes in the VSA256 Graphics
Library V1.1b from which they are built.
-------------- WHATS NEW IN VSA256 GRAPHICS LIBRARY V1.1b -------------
1.) Corrected a bug which caused it to improperly write to graphics memory
(ie. not work) on Paradise cards (and any card which provides window
resolution not equal to 64k). All the data used to pile up at the top
part of the screen. Now it works correctly.
2.) Put in detection for VESA BIOS EXTENSION TSRs which do not support
Text I/O in SVGA modes. In these cases (such as ATI driver) Graphics
will still work but vsa_set_text_cursor, vsa_write_char,
vsa_write_string, and vsa_write_string_alt now will do nothing (instead
of trying to write and thus mucking up the display).
3.) Put in better exception handling to detect no VESA BIOS loaded, un-
supported video modes, etc.
--------------------------- Trouble Shooting --------------------------
1.) If Text seems to be readable but goes in wrong locations on screen,
try manually changing the YCharResolution and YCharSize parameters
after running vsa_init. Some of the older VESA BIOS TSRs report the
wrong YCharsize value (ie. 8 pixels when really 16 ... Trident in
mode 103 ... Paradise )
2.) Remember that programs which use the TIF256 Graphics Library Extension
must be built with the LARGE memory model during compilation.
3.) You should specify a stack size of about 10,000 bytes for this stuff
to work. (Otherwise you'll get "Stack Overflow").