PC Engine 6 button controller

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Mike A:

--- Quote from: pbj on August 16, 2023, 10:34:40 pm ---I had another electronics engineer look over the circuit. I’ve only been feeding and inebriating his ass for 25 years. His comment was similar - the 47k pull ups seem too high. And he thinks my capacitor addition is filtering noise. His suggestion was a 10k array. Perhaps those circuits were all 4.7k and nobody noticed the typo for 35 years?

I tried another capacitor value while I had the box of them out - 220pF and it was the same behavior as 100pF.

I did some play testing tonight. Some games are 100% playable in 2 button mode - Dragons Curse, Alien Crush, Devils Crush.

Some will immediately throw a select input when the level starts, but otherwise play normally - Shinobi, Rondo of Blood.

SF2 plays fine, but it brings up a “define buttons” screen before each match and also skips the between round trash talk scenes. Just like smashing the select button would do. In both 2 and six button mode.

I did notice on most games that pressing select made the character have a down input.

I am so tantalizing close on this one…. But even as-is I’m having fun with it.

:cheers:

--- End quote ---

Keep it up. You will get it.

This is good stuff.

pbj:
Just wanted to mention, same behavior on both assembled boards. They both throw a Select when plugged in, even if I don’t have anything connected to the input pins. If I turn the system on with the board already plugged in, I’m not seemingly getting that input but it may just be the system booting up.

I can leave it at the CD rom menu as long as I want, and it’ll never read a select input until I actually press it (it jumps to memory management instantly when you hit select).

Don’t know what other testing I can do at this point….

lilshawn:
a logic probe would really help you out here.

pbj:
I do actually have a logic probe. Can you type very slowly and tell me what I should do with it?

baritonomarchetto:
Could you reassume the situation so far? What is working and what is not?

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