Compuprint 3056 - Page 22

The pins 1 to 14 of the printer are connected to the pins with the same number of the parallel port of the host.
The pins 19 to 30 of the printer are connected to the pins 18 to 25 of the parallel port of the host.
The pins 31, 32 and 36 of the printer are connected respectively to the pins 16, 15 and 17 of the parallel port of the host.
1284 Mode signal names are shown with their Compatibility mode (Centronics) names in parenthesis ( ) for the bidirectional
link.
Signal Name Pin N°
for Signal Wire
Pin N°
for Return Wire
Source
HostClk (nStrobe) 1 19 HOST
AD1 (Data 1)
AD2 (Data 2)
AD3 (Data 3)
AD4 (Data 4)
AD5 (Data 5)
AD6 (Data 6)
AD7 (Data 7)
AD8 (Data 8)
2
3
4
5
6
7
8
9
20
21
22
23
24
25
26
27
HOST in Compatibility mode and
negotiation phase.
NOT USED in Nibble mode.
BIDIRECTIONAL in Byte mode.
PrtClk (nAck) 10 28 PRINTER
PrtBusy (Busy) 11 29 PRINTER
AckDataReq (PError) 12 28 PRINTER
Xflag (Select) 13 28 PRINTER
HostBusy (nAutofd) 14 30 HOST
Peripheral Logic High (+ 5V) 18 PRINTER
n.a. (nInit) 31 30 HOST
nDataAvail (NFault) 32 29 PRINTER
1284 Active (NSelectIn) 36 30
Common Logic Ground 16 and Return Wires
Chassis Ground 17