Specifications

B–6
Abbreviations, Acronyms, and Signal Mnemonics
PB Parity Bit. . . . . . . . . . . . . . .
PBE Parity Bit Error. . . . . . . . . . . . . .
PCBA Printed Circuit Board Assembly. . . . . . . . . . . . .
PDATA Front Panel Data. . . . . . . . . . . .
PE Printer Error, Paper Empty. . . . . . . . . . . . . . . .
PF1,2 Paper Feed 1, 2. . . . . . . . . . . . .
PFC Paper Feed Controller. . . . . . . . . . . . . .
PFM Paper Feed Motor. . . . . . . . . . . . . .
PI Paper Instruction. . . . . . . . . . . . . . . .
PIEN Paper Instruction Detect Enable. . . . . . . . . . . . .
PM1–4 Paper Motion 1 to 4. . . . . . . . . . . .
PMD Paper Motion Detect. . . . . . . . . . . . . .
PMDA,C,K Paper Motion Detector A, C, K. . . . . . . .
PO Paper Out. . . . . . . . . . . . . . .
PP Parallel Port. . . . . . . . . . . . . . . .
PROM Programmable Read–Only Memory. . . . . . . . . . . .
PUF,G Pull Up F, G. . . . . . . . . . . .
RBN Ribbon. . . . . . . . . . . . . .
RCV Receive. . . . . . . . . . . . . .
RD Read. . . . . . . . . . . . . . .
Ref Shown for reference. . . . . . . . . . . . . . .
REGSEL Select LCD Register. . . . . . . . . .
RET Return. . . . . . . . . . . . . .
REVCHNL Reverse Channel. . . . . . . .
RIB MOT Ribbon Motor. . . . . . . . . .
RIBSW1,2 Ribbon Switch 1 & 2. . . . . . . . .
RRM Right Ribbon Motor. . . . . . . . . . . . .
RSP Ribbon/Shuttle Processor. . . . . . . . . . . . . .
RST Reset. . . . . . . . . . . . . .
RTPU Real Time Processing Unit. . . . . . . . . . . . .
RTS Request to Send. . . . . . . . . . . . . .
RXCLK Receive Clock. . . . . . . . . . .
RXD Receive Detect. . . . . . . . . . . . . .
RXDATA Receive Data. . . . . . . . . .
SDIR Sense Direction. . . . . . . . . . . . .