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Author Topic: double buffering  (Read 11276 times)

ghjjkl

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Re: double buffering
« Reply #15 on: July 03, 2014, 10:21:17 PM »
won't some dos functions work after timer is reprogrammed?
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dedndave

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Re: double buffering
« Reply #16 on: July 04, 2014, 12:59:26 AM »
i think the keyboard uses a different timer
on the original IBM PC, there were 3 programmable counter/timers
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MichaelW

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Re: double buffering
« Reply #17 on: July 04, 2014, 04:37:40 AM »
Quote from: ghjjkl on July 03, 2014, 10:21:17 PM
won't some dos functions work after timer is reprogrammed?

If you are referring to my code reprogramming system timer 0, my Interrupt 8 handler is coded so the previous Interrupt 8 handler gets called at close to the normal rate, so any BIOS or DOS timer based on Interrupt 8 will function normally.

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Well Microsoft, here’s another nice mess you’ve gotten us into.
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