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Connectors and Components on the CPV5000
Parallel LPT Port, TTL levels (some signals are redefined when used in
EPP/ECP modes)
3
ACK*
BUSY
ERR*
PD[7:0]
PE
AFD*
INIT*
SLIN*
STB*
SLCT
Serial COM Ports (a & b), RS232 levels
CTS
DCD
DSR
DTR
RI
RTS
RXD
TXD
Floppy Disk Drive, TTL levels
DSKCHG*
DIR*
DRVDENS[1:0] drive density select
DS[1:0]*
3-14
pulsed by peripheral to acknowledge data sent
indicates that the printer cannot accept more data
peripheral detected an error
parallel data lines, bits 7-0
paper end, indicates the printer is out of paper
auto feed, causes printer to line feed
initializes the printer
select in, selects the printer
data strobe, indicates data is valid
select, peripheral indicates it is selected
clear to send
data carrier detected
data set ready
data terminal ready
ring indicator
request to send
serial receive data
serial transmit data
indicates the drive door has been opened
controls direction of the head during step operations
drive address select
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