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Printer adapter(s)
LPT1 (MDA) LPT2
378h (3BCh) 278h Printer Data port
Data 0 - 7 (pins 2 - 9)
379h (3BDh) 279h Printer Status port (input)
Bit 7 6 5 4 3 2 1 0
x . . . . . . . Busy (pin 11)
. x . . . . . . -Acknowlegde (pin 10)
. . x . . . . . Paper end (pin 12)
. . . x . . . . Select (pin 12)
. . . . x . . . -Error (pin 14)
. . . . . x x x nc
37Ah (3BEh) 27Ah Printer Control port
Bit 7 6 5 4 3 2 1 0
x x x . . . . . nc
. . . x . . . . IRQ enable
. . . . x . . . -slct in (pin 17)
. . . . . x . . -init (pin 16)
. . . . . . x . -autofeed (pin 14)
. . . . . . . x -strobe (pin 1)
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