User's Manual

52 02/18/05 ReVolution User Manual 1.00
Technical Appendices
The following tables show the connector pin-out assignments for the external connections of the ReVolution computer.
Active low signals are indicated by a minus sign. Refer to the “ReVolution at a Glance” section for locations.
RS232 Serial Port (COM A)
Pin Signal name 9-pin SUB D-plug
1 DCD (Data Carrier Detect)
2 RXD (Receive Data)
3 TXD (Transmit Data)
4 DTR (Data Terminal Ready)
5 GND (Signal Ground)
6 DSR (Data Set Ready)
7 RTS (Request to Send)
8 CTS (Clear to Send)
9 RI (Ring Indicator)
Parallel Port (I/O Stick Option Only)
Pin Signal name 25-pin SUB D-socket
1 –STROBE
2 DATA0
3 DATA1
4 DATA2
5 DATA3
6 DATA4
7 DATA5
8 DATA6
9 DATA7
10 –ACKN
11 BUSY
12 PE
13 SELECT
14 –AUTOFD
15 –ERROR
16 –INIT
17 –SLCTIN
18–25 GND