Re: Emulator discrepancies (was DMA'ing in Commodore 64 for developing purposes.)

From: tokafondo_at_tokafondo.name Date: Sat, 18 Jun 2022 23:21:11 +0000 Message-ID: <f7732c35b828e45dad597d7e8c417fff_at_tokafondo.name>

18 de junio de 2022 22:40, "Michal Pleban" <lists_at_michau.name> escribió:

> tokafondo_at_tokafondo.name wrote on 18.06.2022 23:15:
> 
>> It seems there is a good candidate here for that:
>> https://uk.pi-supply.com/products/ryanteck-rtk-gpio-pc-gpio-interface?lang=es
>> This is a small board that adds 28 pins of gpio to any standard PC, controlled with the USB port.
>> I counted 28 pins for DMA'ing into a Commodore 64. I'm surely wrong and there are more needed... or
>> maybe I'm right and this is a way to do it.
> 
> I sincerely doubt that it would be fast enough to control all the 28 pins with the speed required
> to do DMA transfer. I suspect it is using some kind of serial port to communicate, which will be
> awfully slow.

I'm sure it is, because the transfers between that board and a PC are done by USB. And the software controlling it is python based.

So maybe as previously said, a way could be have a man in the middle, injecting DMA transfer those 24+4 lines, while receiving command from a PC.

Would any of those RaspBerry, its clones or similars, or ATMega based MCUs, do the trick?

> 
> Regards,
> Michau