Combination Printer Programmer's Manual

25
Optional parallel interface pins and signal names
Signal Name Sample Circuit
Input
DATA 1
DATA 8
STR
OBE
Output
BUSY
ACK
4.7kΩ
74LS-equivalent
1kΩ
100Ω
1000pF
74LS-equivalent
1.8kΩ
74LS-equivalent
(18) (1)
(36) (19)