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AH = C0h DX = printer port (0-3)
Return:
ES:BX -> control block (see #00646)
See Also: AH=C1h
Format of PCSpool control block: Offset Size Description (Table 00646) 00h WORD printer number 02h WORD address of printer status port 04h WORD number of first record in queue 06h WORD number of last record in queue 08h DWORD characters already printed 0Ch DWORD number of characters remaining 10h DWORD pointer to dequeue buffer 14h DWORD previous count of characters printed 18h DWORD number of clock ticks taken to print them 1Ch WORD offset of next character to output 1Eh WORD offset of next character to print 20h WORD pointer to spooling queue record 22h BYTE current spooling status 23h BYTE current printer status: 00h OK 01h not ready 02h paused with message 03h paused 04h initializing FEh non-existent port FFh not spooled 24h BYTE current control record type 25h WORD observed printer speed 27h WORD characters to print per service 29h BYTE 01h if disk write needed 2Ah BYTE 01h if queued data should be flushed 2Bh BYTE 01h to update cps status
Category: Caches/Spoolers - Int 17h - P
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