89
89
or from some ISA devices, EIRQ_REG can distinguish up to 8 ISA IRQs.
91
91
The Q40 custom chip is programmable to provide 2 periodic timers:
93
93
- 10 or 20 KHz - level 4, used for dma-sound
95
95
Linux uses the 200 Hz interrupt for timer and beep by default.