After experimentation, I can confirm the following:
The black wire must go to the mic plug
The gray wire must go to th ear plug
No wire goes in the remote plug
This is for the nec only.
________________________________
De : M100 <[email protected]> de la part de Alain Dextraze 
<[email protected]>
Envoyé : 24 juin 2017 08:23:14
À : [email protected]
Objet : Re: [M100] Nec pc-8201


Thank you.

NEC <[email protected]> a écrit :


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

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