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Acorn Archimedes? #48276
02/22/09 12:14 AM
02/22/09 12:14 AM
Joined: Feb 2009
Posts: 9
Sydney, Australia
tcdev Offline OP
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tcdev  Offline OP
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Joined: Feb 2009
Posts: 9
Sydney, Australia
Anyone know the status of the Archimedes driver?

I'm starting on an FPGA implementation (will take a while as I need to do the ARM2 core as well), and I thought I'd also have a go at doing a MESS driver for it, as it'll ultimately assist in what I'm doing.

Not that I know much about the hardware atm.

Regards,

Re: Acorn Archimedes? [Re: tcdev] #48278
02/22/09 02:57 AM
02/22/09 02:57 AM
Joined: Mar 2001
Posts: 16,070
USA
R
R. Belmont Online content
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R. Belmont  Online Content
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R
Joined: Mar 2001
Posts: 16,070
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The driver was quite preliminary and it got worse when I split the code out into shared and MESS-specific (MAME has some arcade machines that ran on an Archimedes board). Basically the MEMC chip (MMU) is complete but not well tested and there's partial handling for the VIDC (video controller). It was sufficient to get fairly far into the RiscOS bootup tests at one point but not quite enough to actually boot or show anything. I have datasheets for all the custom chips but they're by no means complete or through so there's lots of guesswork involved.

Re: Acorn Archimedes? [Re: R. Belmont] #48280
02/22/09 06:21 AM
02/22/09 06:21 AM
Joined: Feb 2009
Posts: 9
Sydney, Australia
tcdev Offline OP
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tcdev  Offline OP
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Joined: Feb 2009
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OK, thanks for the update.

I only got interested in the Archimedes because I was itching to do a CPU in an FPGA, and thought that an ARM2 would be a good choice. I've been collecting ARM and Archimedes doco, including the "datasheets" for the 4 main chips in the thing. I've started on the ARM2 (FPGA) but aside from a quick perusal of the doco I've downloaded thus far, I don't know a lot about this platform.

It's also been a _long_ time since I wrote a MAME/MESS driver - a private driver for some custom hardware for v0.79! smile No doubt there's been plenty of changes since then!

Oh well, this is the _fun_ part - right! :P


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