Apricot System Unit Connectors

Video Connector
Serial Port 9 pin
Serial Port 25 pin
Parallel Port
Keyboard / Mouse Port
Qi / Panther Power Connector


Video Connector

Pin Output Mono Color
1 Red No Pin Red
2 Green Mono Green
3 Blue No Pin Blue
4 Reserved No Pin No Pin
5 Digital G Self Test Self Test
6 Red Return Key Pin Red Return
7 Green Return Mono Return Green Return
8 Blue Return No Pin Blue Return
9 Plug No Pin No Pin
10 Digital G Digital G Digital G
11 Reserved No Pin Digital G
12 Reserved Digital G No Pin
13 Horizontal Sync Horizontal Sync Horizontal Sync
14 Vertical Sync Vertical Sync Vertical Sync
15 Reserved No Pin No Pin


Serial Port 9 pin

Pin Signal Name Input / Output
3 Transmit Data Output
2 Receive Data Input
7 Request To Send Output
8 Clear To Send Input
6 Data Set Ready Input
5 Ground N/A
1 Data Carrier Detect Input
4 Data Terminal Ready Output
9 Ring Indicator Input


Serial Port 25 pin

Pin Signal Name Input / Output
2 Transmit Data Output
3 Receive Data Input
4 Request To Send Output
5 Clear To Send Input
6 Data Set Ready Input
7 Ground N/A
8 Data Carrier Detect Input
20 Data Terminal Ready Output
22 Ring Indicate Input


Parallel Port

Pin Input/Output Signal Name Pin Input/Output Signal Name
1 Input/Output Strobe 10 Input Acknowledge -
2 Input/Output Data bit 0 11 Input Busy
3 Input/Output Data bit 1 12 Input PE
4 Input/Output Data bit 2 13 Input SLCT
5 Input/Output Data bit 3 14 Output Autofeed XT -
6 Input/Output Data bit 4 15 Input Error -
7 Input/Output Data bit 5 16 Output Initialise -
8 Input/Output Data bit 6 17 Output SLCT in -
9 Input/Output Data bit 7 18-25 Ground


Keyboard / Mouse Port

Pin Input / Output Signal Name
1 Input/Output Data
2 Reserved
3 Ground
4 +5V DC
5 Input/Output Clock
6 Reserved


Qi / Panther Power Connector

Pin Function Color
1 +5V Yellow
2 Ground Black
3 +12V Red
4 +5V Yellow
5 Ground Black
6 Power Good Orange
7 +5V Yellow
8 Ground Black
9 Ground Black
10 +5V Yellow
11 Ground Black
12 -12V Grey

Content created and/or collected by:
Louis F. Ohland, Peter H. Wendt, David L. Beem, William R. Walsh, Tatsuo Sunagawa, Tomáš Slavotínek, Jim Shorney, Tim N. Clarke, Kevin Bowling, and many others.

Ardent Tool of Capitalism is maintained by Tomáš Slavotínek.
Last update: 24 Mar 2024 - Changelog | About | Legal & Contact