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Amiga Floppy

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...

keith
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Amiga Floppy

new design

I took David’s advice, and I rewrote the code last night. Some highlights: 1. ISR is entirely in assembly. Although I haven’t manually counted, it appears to be about 400ns in length. 2. ISR triggers only...

101 views
Amiga Floppy

Am I reading MFM wrong?

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100 views
Amiga FloppyInactive

more real world tests

So tonight, I put my new FPGA implementation of the amiga floppy project to good use.  I read some more of my collection of amiga floppies. GREAT NEWS. It’s working like a champ.  As a matter of fact, I selected...

98 views
Amiga Floppy

Found another UART timing issue

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98 views
Amiga Floppy

sync on data

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98 views
Amiga Floppy

logic analyzers

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97 views
Amiga Floppy

Finally had some luck with FPGA board

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97 views
Amiga FloppyInactive

found bug last night

With this new FPGA solution, certain tracks would result in what I call a “short read.”  A short read is any received track that contains less than 28,125 delta T’s, aka pulse times.  Given a certain...

97 views