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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

Parallax USR2SER

So I got my Parallax USR2SER in yesterday. Man is this thing tiny!! About the same width of my finger, and about 1/3 the length! And its mostly surface mount stuff….. It works like a charm. Easy installation, I...

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Amiga Floppy

will put up sample files

I’m going to put up a sample file or two, but I wanted to get the smallest complete group of bytes that I can…. ie like one full sector, etc. So far, I’m just basically streaming bytes, via disk copy...

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Amiga Floppy

PC to SX transfer images

I haven’t spent much time within the last few days on the project. Looking at the data on the PC, I think that there are still some problems. I think the problems lie in the fact that the interface to the parallel...

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Amiga Floppy

new timing image

I think this is timing from like 97 or so, and this is pretty good. I’ve switched to 93 for the time being, because I’ve had the best results with that. This still shows accurate reading of this particular...

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Amiga Floppy

heat problems

As I alluded in an earlier post(s), my SX28 has been pretty warm. After doing a number of different tests, I’ve now ordered an infrared thermometer from amazon for $29.99. I want to find out exactly how hot this...

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Amiga Floppy

USB uart send and receive

Good news, good news. After banging my head on the same problem for the last three hours, I’ve finally made some more progress. Using option #2 from the previous post, I’ve written two non-isr based software...

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Amiga Floppy

Commands A and B implemented and working

Ok.  I got two commands A and B implemented and working. Command B from the PC instructs the SX to enable interrupts, and get ready to receive a track into fram.  This command will eventually be expanded to actually...

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Amiga Floppy

Changes to the PC side

With more and more things pointing to the PC, I’ve decided to really reduce the amount of work the PC has to do in its receive loop. I looked at Marco’s because his was designed to run (albeit in dos/dos...

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Amiga Floppy

slacking indeed

I’ve been horrible about the project lately.  Dunno why. Today is the first time I’ve looked at it in quite some time.  The last couple hours have been spent trying to remember exactly where I’ve been...

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Amiga Floppy

revisited memory routines

I was looking over my reading and writing routines. Minimums for the fram are Clock high min. 28ns Clock low min. 28ns Data setup min 5ns I write in two places: First, when bits are coming in from the drive, and the ISR...

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