double buffering

[ghjjkl]

won't some dos functions work after timer is reprogrammed?

[dedndave]

i think the keyboard uses a different timer
on the original IBM PC, there were 3 programmable counter/timers

[MichaelW]

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.