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1987-11-30
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November 30, 1987
In a fit of generosity I've included the source code to the the
initialization routine (since it is so IBM-PC specific I thought
it would be useful for development on other systems.)
wn_init also contains most of the global variables, so be careful.
(see globals.h.)
December 1, 1987
Added a snowfree DMA mode which is somewhat faster than using
BIOS. Set 'method' = DMA, 'snowfree' = TRUE, and 'snowspeed'
= about 140. The problem is that this mode is somewhat finicky
you need to set snowspeed to a value which is less than the total
number of characters that you can output during the video trace,
140 (2 bytes per character, or 70 characters) seems to be about
right, but you'll have to experiment. Also, any byte by byte
video output, like vs_printf is very slow -- use wn_suspendw on
the front and backend to suppress byte by byte output to the
physical screen (if you want to speed it up.)