SYMBOL
PIN
I/O
FUNCTION
BUSY
24
INt
PRINTER MODE: BUSY
An active high input indicates that the printer is not ready to receive
data. This pin is pulled high internally. Refer to the description of
the parallel port for the definition of this pin in ECP and EPP mode.
EXTENSION FDD MODE: nMOB2
This pin is for Extension FDD B; the function of this pin is the same
as that of the nMOB pin.
OD12
INt
EXTENSION ADAPTER MODE: XIRQ
This pin is an interrupt request generated by the Extension Adapter
and is an active high input.
OD12
EXTENSION 2FDD MODE: nMOB2
This pin is for Extension FDD A and B; the function of this pin is the
same as that of the nMOB pin.
JOYSTICK MODE: NC pin.
-
nACK
26
INt
PRINTER MODE: nACK
An active low input on this pin indicates that the printer has
received data and is ready to accept more data. This pin is pulled
high internally. Refer to the description of the parallel port for the
definition of this pin in ECP and EPP mode.
EXTENSION FDD MODE: nDSB2
This pin is for the Extension FDD B; its functions are the same as
those of the nDSB pin.
EXTENSION ADAPTER MODE: XDRQ
OD12
INt
DMA request generated by the Extension Adapter. An active high
input.
OD12
EXTENSION 2FDD MODE: nDSB2
This pin is for Extension FDD A and B; this function of this pin is
the same as that of the nDSB pin.
JOYSTICK MODE: NC pin.
-
PE
27
INt
PRINTER MODE: PE
An active high input on this pin indicates that the printer has
detected the end of the paper. This pin is pulled high internally.
Refer to the description of the parallel port for the definition of this
pin in ECP and EPP mode.
OD12
EXTENSION FDD MODE: nWD2
This pin is for Extension FDD B; its function is the same as that of
the nWD pin.
OUT12t EXTENSION ADAPTER MODE: XA0
This pin is system address A0 for the Extension Adapter
OD12
EXTENSION 2FDD MODE: nWD2
This pin is for Extension FDD A and B; this function of this pin is
the same as that of the nWD pin.
JOYSTICK MODE: NC pin.
-
10
SMSC [ SMSC CORPORATION ]
