The SCC DMA use was part of a larger program. I have to see - when I'm back home and assuming that I don't forget - if I can extract the appropriate code snippet.
Von: Nicolas Pomarède <npomarede@xxxxxxxxxxxx>
Gesendet: Freitag, September 15, 2023 9:58:17 AM
An: hatari-devel@xxxxxxxxxxxxxxxxxxx <hatari-devel@xxxxxxxxxxxxxxxxxxx>; Christian Zietz <czietz@xxxxxxx>
Betreff: Re: [hatari-devel] New SCC 85C30 support for MegaSTE/TT/Falcon
Le 15/09/2023 à 09:38, Christian Zietz a écrit :
> Nicolas Pomarède schrieb:
>
>> - some regs at FF8C01-FF8C15 to handle dma transfer with SCC. Not
>> supported yet. Are there some TT programs that make use of this ?
>> (Emutos maybe ?)
>
> EmuTOS does not use the SCC *DMA*. I've used it once (outside of EmuTOS,
> to be clear) as a means of doing a reasonably fast memory dump after a
> crash. But otherwise I don't know a program that would use the TT's SCC
> DMA. I assume, Atari included this DMA capability mainly for the LAN
> port, which itself saw little use, afaik.
>
Adding the code to handle DMA should not be that hard (as it mainly
means to read SSC's RR8 to RAM or write RAM to WR8).
If you kept your program somewhere, it could be useful to validate the
DMA+SCC is working.
Nicolas