Alas, now that I determined the epoxy is soft and not adhering well, I confirmed I was able to dislodge the DSUB-15 male connectors I'd intended to use for controller ports.
So I peeled it all off and set the ports I'd soldered aside.
Got me to thinking maybe I could use a high-grade monitor cable and then secure that with screws. I was (briefly) excited when I verified ALL the pins had connection all the way through. I thought I recalled that SVGA cables use some subset of the 16 available pins (15 + shield).
Well, I was right. It's 13 (12 + shield). The 3 "extra" I'd been seeing connected (pins 6, 7, & 8) are indeed connected - TO THE SHIELD. Alas.
So now I'm back to reinstalling my 15/16 connector ports (15 + shield). Technically, I need 17 if I want to use every last possible control pin from the ControlBlock. That may be unnecessary, as what game requires that many? But I hate to limit it from the get-go.
So I'm still looking for something that will fit those controller holes and carries 17 or more connectors.






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