Hi Alain.
Kurt already answered you, anyway take a look at this:
CMT (cassette) TRS-80/100 & PC-8201A
(7) (6)
(3) (8) (1)
(5) (4)
(2)
Model 100 (http://www.trs-80.com/trs80-models-model100.htm)
Cassette (CMT)
Pin Number Signal line Remarks I/O
1 Remote 1 Remote
2 Ground
3 Remote 2 Remote
4 RxC Receive data for CMT
5 TxC Receive data for CMT
6 Ground
7 Not Connected
8 Not Connected
Input level: Inpedance 100ohm (800mV - 5Vpp)
Output level: Inpedance 3.3kohm (650mVpp)
REMote: 6 VDC 0.5A max.
NEC PC-8201A (http://www.web8201.net/default.asp?content=faq.asp)
Cassette (CMT)
Pin Number Signal line Remarks I/O
1 TEST Testing signal for testing audio cassette recorder O (TTL level output)
2 GND Signal ground
3 GND Electrical power ground
4 REC Write cassette audio signal (MIC) O (Output to MIC)
5 MON Read cassette audio signal (EAR) I (Input from EAR)
6 REM + Cassette remote control plug positive (+) REM1 O (Remote terminal +)
7 REM - Cassette remote control plug negative (-) REM2 O (Remote terminal -)
8 Vcc +5V
Peppino
