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AH = 07h AL = events to monitor (see #04015) BX = number of timer ticks until timeout if AL bit 1 set CX = bitmap of IRQs to monitor if AL bit 2 set (bit 0 = IRQ0 .. bit 15 = IRQ15) DX = port to monitor if AL bit 3 set
Return:
CF clear if successful AL = type of event which woke up task (see #04015) CX = IRQ (if any) which awakened task DX = port (if any) which awakened task CF set on error AX = error code (see #01680 at INT 21/AH=59h/BX=0000h)
Note: A device driver may make this call with AL=00h, which indicates that the driver is responsible for setting and clearing the TCBWAIT field in the TCB. To put task to sleep, set TCBWAIT bits 2-0 to 001; to reawaken it, set bit 1 (leaving other bits unchanged)
See Also: AH=04h - INT 16/AH=00h - INT 38
Bitfields for PC-MOS/386 events to monitor: Bit(s) Description (Table 04015) 0 keystroke 1 timeout 2 IRQ 3 port access 7 return status of user poll routine (other ignored if set)
Category: Other Operating Systems - Int D4h - P
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