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inital results on error correction

While I have yet to actually implement the full-scale error correction as I want to, I did some manual tests today. I basically took a track that I was erroring out on, and swapped in 1-bit away values for the bad bytes.  In some cases, it appeared...

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floppy.c’s mfm decoder

floppy.c’s mfm decoder

A couple days ago, whenever I got ahold of floppy.c, I wrote a quickie code stub that utilizes floppySectorMfmDecode from floppy.c of fellow (). Note you must use the mirrors to actually download anything…. This...

how the amiga reads floppies

how the amiga reads floppies

So I’ve forever wondered, at the hardware level, how the amiga reads floppy disks.  I’ve gotten bits and pieces over the years, but I’ve never really understood the bulk of it. So there are four main...

Bug Katcher on Agnus

Bug Katcher on Agnus

I swear I already posted about this but heck if I can find the post.  Anyways, here’s a photo of a bug katcher installed on Agnus on a Commodore Amiga 500. This gives me the ability to attach a logic analyzer to...

logic analyzer on Amiga 500 Paula chip

logic analyzer on Amiga 500 Paula chip

So I’ve attached my Intronix LA1034 to the Paula chip, the 16-bit wide data bus, and the DMA Request line. I triggered the logic analyzer on 0x4489, of course. Here’s the results: (click for a full size...