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Desc: Called from the hardware timer tick interrupt, after executing the first four BIOS timing events, updating the system clock, saving registers, and switching to a temporary stack (the one reserved for IRQ3), but before calling INT 58. No details available
Notes: This interrupt is invoked on every fourth timer interrupt. The handler for this interrupt may destroy AX,BX,DI,ES but must preserve all other registers; 8 WORDs of stack space are available, of which at most 4 may be used if the handler enables interrupts. If the handler switches stacks (because more than 4/8 WORDs are required), the original stack must be restored before chaining to the previous handler
See Also: INT 43"TI Professional" - INT 4C"TI Professional"
See Also: INT 58"TI Professional"
Category: Vendor-specific BIOS Extensions - Int 5Ah - T
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