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Re: TFMSX Arrives
Posted: 23 Sep 2021 14:28
by PaulJ_2.0
Maybe this could work:
https://uk.rs-online.com/web/p/real-tim ... /6676221p/
Disclaimer: I didn't look at the pinouts, I've just seen them used on modern amiga ram/clock boards.
Re: TFMSX Arrives
Posted: 23 Sep 2021 14:39
by terriblefire
its not just the pinouts. Its got to be RP5C01 compatible.
Re: TFMSX Arrives
Posted: 23 Sep 2021 17:26
by arkadiusz.makarenko
terriblefire wrote: 23 Sep 2021 14:39
its not just the pinouts. Its got to be RP5C01 compatible.
It could be emulated in arm?
Re: TFMSX Arrives
Posted: 23 Sep 2021 18:38
by terriblefire
Probably well enough yes. We dont need the time to be correct.. just that it ticks.
Re: TFMSX Arrives
Posted: 23 Sep 2021 20:17
by arkadiusz.makarenko
If precision and keeping time is not important then even clock oscillator and battery would not be required.
Re: TFMSX Arrives
Posted: 23 Sep 2021 21:23
by terriblefire
i've basically wired up every spare CPLD pin to the arm now.
Re: TFMSX Arrives
Posted: 24 Sep 2021 20:34
by Matej
Can be there 12v/+- for soundcards? Like opl4 or carnivore2 (got scc in fpga) cartridge? Also instead of SCC can be there MSXmusic standard?
Re: TFMSX Arrives
Posted: 24 Sep 2021 22:13
by terriblefire
Matej wrote: 24 Sep 2021 20:34
Can be there 12v/+- for soundcards? Like opl4 or carnivore2 (got scc in fpga) cartridge? Also instead of SCC can be there MSXmusic standard?
no.
Re: TFMSX Arrives
Posted: 24 Sep 2021 22:24
by PhilC
I presume the MSX2 uses the ram on the clock chips for config settings then? A bit like the Falcon I guess.
I've googled the chip and it does seem to be available still easily enough but if you can easily emulate it then I guess it's a nobrainer unless you need to use the arm horsepower somewhere else?
Re: TFMSX Arrives
Posted: 24 Sep 2021 22:31
by terriblefire
PhilC wrote: 24 Sep 2021 22:24
I presume the MSX2 uses the ram on the clock chips for config settings then? A bit like the Falcon I guess.
I've googled the chip and it does seem to be available still easily enough but if you can easily emulate it then I guess it's a nobrainer unless you need to use the arm horsepower somewhere else?
There is a bit of a penalty transferring stuff between the arm and CPLD. Really at this point i'm trying to give us the tools to do what we need.