Feb 25, 1991  STK Version 1.1 Released
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- Added gr_setvisualpage and gr_setactivepage. These should be used
instead of the BGI functions, since these set the variables
gr_visualpage and gr_activepage which are used by other gr functions.

- Added GR_MODE_CLEAR_FAST text writing mode. This mode uses the
fixed 8x8 character set from ROM and writes directly into screen
memory. It restricts writing to byte resolution in X direction and it
works only in those modes supported by the sprite routines, but it
several times faster than GR_MODE_CLEAR.

- Corrected error with va_start usage in several functions

- The sources can be compiled with Turbo C++ 1.0, too.

- spr_regulate_speed now uses timer interrupt to regulate the speed
to exactly 18.2 frames per second (provided that the machine is fast
enough!) 

- Documentation divided into two files: STK.DOC gives genereal
information and STKREF.DOC is a reference to the functions.

- StarMines extended: background stars, several new alien types, hall
of fame, bug fixes, cheat mode.

- SPRDEMO demonstration program added.

- The functions can be used in the color EGA mode, too, but only
black and white sprites are supported. If you have a multicolored
background it is not preserved when the sprites moves over it.

- SPR and SPR_HIT functions check the SPRITE arguments and call
spr_err if they are invalid.

- Some new gr_printf functions added.

- Load/save filenames are now echoed correctly in SPRED.


Oct 20, 1990  STK Version 1.0 Released
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