+4 User Port connector pinout

#Computer#Buses and Slots

Available on Commodore +4 computer.

24 pin DZM 12 DREH connector pin-out & layout24 pin DZM 12 DREH connector  at the computer ?

PinNameDescription
1GNDGround
2+5V+5 VDC
3/BRESET?
4P2/CSEData 2/Cassette Sense
5P3Data 3
6P4Data 4
7P5Data 5
8RxCReceive Clock
9ATNAttention?
10+9V+9 VAC
11+9V+9 VAC
12GNDGround
AGNDGround
BP0Data 0
CRxDReceive Data
DRTSRequest to Send
EDTRData Terminal Ready
FP7Data 7
GDCDData Carrier Detect
HP6Data 6
ICTSClear to Send
JDSRData Set Ready
KTxDTransmit Data
LGNDGround

ZX Spectrum 128 RGB connector

144 pin SO DIMM connector pinout