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Re: Multi-Tasking on Apple IIgs?
- Subject: Re: Multi-Tasking on Apple IIgs?
- From: aiiadict@gmail.com
- Date: 10 Mar 2005 14:22:45 -0800
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Mouse cards and GEOS interrupt cards produce
interrupts at 60hz.
I used a z80 computer on my robot to generate
interrupts at different intervals (different programs
need to be activated at different times). I hacked an
interrupt routine that puts the interrupt ID on the parallel
card. When an interrupt occurs (triggered by the
z80 timer or other hardware connected to the robot)
the Interrupt identifier code gets put on the parallel
input. The interrupt code on the 6502 reads the
parallel card to get the ID, and branches to the
appropriate code to handle the interrupt.
Rich