Piedinature - Pinouts
TI-99/4A Keyboard connector

Torna alla Home Page di Jack
Torna alla pagina delle informazioni tecniche
Torna alla pagina dei Pinouts


UNKNOW connector (inside the console) Red wire is #15

Pin12131415986
5=.,MN/
4spaceLKJH;
1enterOIUYP
298760
7fctn23451lock
3shiftSDFGA
10ctrlWERTQ
11XCVBZ

Note:
Pressing a key closes the contact between corresponding row + column.
Since there are no diodes to prevent current going backwards, pressing 3 keys at a time often results in appearance of a "phantom" key at the 4th corner of the square formed by these keys (e.g 8+7+3=phantom 4: current goes pin15-7-8-3-pin7 as if 4 were pressed).



Torna alla Home Page di Jack
Torna alla pagina delle informazioni tecniche
Torna alla pagina dei Pinouts

(C) 2003-2024 Jack aka JackMauro aka Mauro