Boca Research FSP 44 - Manual (Page 23)

6.0 Interface Pinouts
Serial Pinouts
RS232 (Standard)
Pin Function
2Printer Transmit
3Printer Receive
7Ground
5,20 DTR (Printer Ready)
4,22 RTS (+5Vdc)
Typical RS232 Pin Connections
* Optional Connection
19
(Standard)
25 PIN PC
BOCA CPU
23 RXD
32 TXD
77 GND
20 6 DSR
20 5 CTS*
20 8 CD*
(Standard)
9 PIN PC
BOCA CPU
22 RXD
33 TXD
75 GND
20 6 DSR
20 1 CD*
20 8 CTS*
Parallel Pinouts
Pin Function
1 Strobe (negative)
2-9 DATA (DBØ - DB7)
10 ACK (negative)
11 BUSY
12 PAPER OUT
15 ERROR (negative)
18 Ground