Beeb FPGA

discuss both original and modern hardware for the bbc micro/electron
slingshot
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Re: Beeb FPGA

Post by slingshot » Thu Jun 04, 2020 4:39 pm

hoglet wrote:
Thu Jun 04, 2020 3:58 pm
Thanks, I'll look are merging those changing back in.

I've created an issue to remind me to do this:
https://github.com/hoglet67/BeebFpga/issues/8

Dave
Cool! You'll find the SD card side interface of the WD1772 is MiST-specific, but, well there's no standard interface for this kind of stuff.

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fordp
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Re: Beeb FPGA

Post by fordp » Thu Jun 04, 2020 5:01 pm

I wonder why the disc controller was only added to the master, there were plenty of 177X disc controllers for the Beeb and plenty of reasons for wanting say ADFS floppies too. I used them on my 32016 CoPro BITD.
FordP (Simon Ellwood)
Time is an illusion. Lunchtime, doubly so!

slingshot
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Re: Beeb FPGA

Post by slingshot » Thu Jun 04, 2020 5:42 pm

fordp wrote:
Thu Jun 04, 2020 5:01 pm
I wonder why the disc controller was only added to the master, there were plenty of 177X disc controllers for the Beeb and plenty of reasons for wanting say ADFS floppies too. I used them on my 32016 CoPro BITD.
Maybe it's just a start. The address decoding and the DFS used in Master was mostly straightforward. I don't really know what's the most used 177x for the Beeb, and then have to find a good DFS ROM, too. ADFS currently not supported, I have to research the image file format(s) used for that. I hope there's a simple sector dump format, like the SSD and DSD.

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fordp
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Re: Beeb FPGA

Post by fordp » Thu Jun 04, 2020 6:29 pm

Well the Disc controller was built in to the master whereas the say Acorn 1770 interface like I had was pretty rare I guess. In any case it should be straightforward to add it to the Beeb I guess.
FordP (Simon Ellwood)
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