Int 08

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IRQ0 - SYSTEM TIMER

Desc: Generated 18.2 times per second by channel 0 of the 8254 system timer, this interrupt is used to keep the time-of-day clock updated

Notes: Programs which need to be invoked regularly should use INT 1C unless they need to reprogram the timer while still keeping the time-of-day clock running at the proper rate. Default handler is at F000h:FEA5h in IBM PC and 100%-compatible BIOSes. May be masked by setting bit 0 on I/O port 21h

See Also: INT 1C - INT 4A"SYSTEM" - INT 50"DESQview" - INT 58"DoubleDOS"

See Also: INT 78"GO32" - INT D8"Screen Thief" - MEM 0040h:0040h - MEM 0040h:006Ch

Category: Hardware - Int 08h - I

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