Interval Timer - Tandy 600 Programmer's Reference Manual

Interval
Timer
When
the
BIOS
receives an
interval timer interrupt
it
must execute an INT
4Dh
sometime
during the interrupt routine.
INT
4Dh
- Interval
Timer
Hook
Entry:
No
registers specified
Exit:
No
registers specified
The
ROM-BIOS
gives
interrupt
every 31.25
msecs.
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