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fruit-bat / pico-zxspectrum

ZX Spectrum for Raspberry Pico Pi RP2040
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Kempston joystick issiue on PicoZX VGA Board with Pico W #60

Open Ripper912 opened 1 year ago

Ripper912 commented 1 year ago

Hi,

I build myself a PicoZX with VGA boards from Bobricius: https://www.tindie.com/products/bobricius/picozx-zx-spectrum-128k-vga-emulator-on-rpi-pico/ with Fruit-bat onboard. However I used Pico W instead a regullar Pico and have a "semi non-working" 9pin- Kempston joystick on many games. Strange behaviour as around 20% .z80 are working flawlessly, 20% .z80s are freezing and the rest around 60% of .z80 are compleatly non responsive at all ;-(

PS:Joysticks are Competion Pro & 2xQuickshots(xtested on ZX Spectrum +2A and Clones like Didaktik Gama/M tested & fully working)

Thanks for any help or support

Ripper912 commented 1 year ago

apparently a long/er 9 pin cable(+25 CM)could cause exact such issues.I will shorten the cables and test if it helps...Still many thanks as your project is bringing me a lot of childhood memories ....good job

fruit-bat commented 1 year ago

Sorry to hear that you are having lots of trouble with z80 compatibility. The emulation only supports the 48k and 128k models - and then only an approximation. The z80 format can contain information for other models, which will just not work. Though I am surprised at the failure rate... most work fine for me, rather than the other way round.

I will check my latest build on the bobricius board in case I have broken it!

fruit-bat commented 1 year ago

I've loaded up the latest build and it seems to be working ok for me.

When you say 'freezing' can you still access the menus or has it locked up completely. I ask as maybe the PicoW is less happy running at 200Mhz than the Pico.

Ripper912 commented 1 year ago

Hi thanks for testing. I had time to play with the board once again and have to say I propabaly found the error. I have powered the board from the MicroUSB of the RB Pico however on Bobricius VGA board there are actualy 2xaddiational Vias next to audio Jack.Once powered via the Vias All USB devicess (incl.keyboards& joystick 🕹️)are now fully working. Also the compatiblity with the Atari 9pin connctors is now Higher(but still not 100%- Menu works Also by freeze)-propably shorter cable 20-30cm max should fix this as well according the creator - Peter.thanks for the support & help -keep going 👍