IBM 5150 PC Technical Reference (6025005, August, 1981) (PDF)

Options (continued)
Parallel Printer Adapter 2-65
"ORed" 2-65
OSC (Oscillator) 2-10
Other Read/Write Memory Usage 3-6
OUT PORT 2-39
Output
AC 2-34
Address 2-67
DC 2-34
Port 2-65
OUT 1 2-132
OUT 2 2-132
Output Signals
Baud Out (BAUD OUT) 2-132
Chip Select Out (CSOUT) 2-132
Data Terminal Ready (DTR) 2-132
Driver Disable (DDIS) 2-132
Interrupt (INTRPT) 2-132
Output 1 (OUTl) 2-132
Output 2 (OUT2) 2-132
Request to Send (RTS) 2-132
Serial Output (SOUT) 2-132
Overview (Hardware) 1-1
Over Voltage/Current Protection 2-36
p
Parallel Printer Adapter
ASCII Coding Table 2-78
ASCII Control Codes 2-79
Block Diagram 2-66
Description 2-37
DMA Channel 2-42
IBM 80 CPS Matrix Printer 2-70
I/O Address and Bit Map 2-42
Interrupt Levels 2-42
Logic Diagram D-31
Parallel Interface Description 2-73
Printer Specifications 2-71
Programming Considerations 2-67
Programming the 6845 CRT Controller 2-41
Sequence of Events 2-41
Setting the DIP Switches 2-72
Timing 2-77
1-13