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| PC Engine 6 button controller |
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| mourix:
--- Quote from: pbj on August 22, 2023, 12:13:53 pm ---Well, if I put select directly to Vcc, and then I ground out select, the console scrambles the graphics and freezes up, so that is a no go. If I just leave it connected to Vcc and wait, after a few seconds the system registers a phantom select press. I still get a select input when I plug in the controller cable with the system on. --- End quote --- The idea was to pull select hard high to rule out any chance for ghost presses by bad wiring or pullups not working, which it did. You just added the short circuit :dizzy: |
| pbj:
Was I supposed to leave it tied to Vcc and then not press it? Type slowly, I'm begging. |
| pdco_arcade:
Hi pbj, Is the interface working now or is it still producing a select when initially connected ? |
| pbj:
Nothings changed. I throw an occasional bid on a PC Engine to mail it to mourix. They’re selling crazy high lately. I’ve played with it a little more. Tied in Vcc to Ground with a 100pf cap on that first IC. I notice that hitting select also sends a down input. |
| baritonomarchetto:
Being a simple design, I would suggest to emulate the circuit with a circuit simulator tool like circuitJS1. This way one could at least see if those schematics makes any sense... |
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