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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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Latest articles

Amiga Floppy

March 21st Status

Well, here’s where I’m at: The external amiga floppy drive is now hooked directly to my SX microcontroller. The code within the microcontroller waits for a command. If it get’s a “B”...

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Amiga Floppy

redone transfer routine

So my transfer routine has been a little flaky lately. I’m not sure exactly why but I think it’s related to the number of processes I’m running. While it’s a P4 2.4, I think USB scheduling is...

124 views

Amiga Floppy

recent status

Well, I’ve put a decent number of hours in on the project over the last couple weeks. I’ve mostly been “spinning my wheels” because I haven’t made much progress, but I think I’ve...

122 views

Amiga Floppy

RXTX and Java

As I mentioned before, I’m using RXTX to do serial communication in Java since Sun has dropped support for serial communication under the Windows platform. I want to revamp my read routines on the java side...

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Amiga Floppy

an output file from my project

DiskMonTools says it's reading 16200 bytes. My project is reading a filesize of 15892 consistently.
Here's the link to the sampled file.

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Amiga Floppy Inactive

Histogram of one track

Here’s a histogram of one track off an amiga floppy disk. Notice the peaks near 4us, 6us, and 8us. I’ve got this data from my logic analyzer, crunched through my little C proggie, and then graphed with...

121 views

Amiga Floppy

Flow control

I’ve gotten away thus far without any flow control. I just started noticing that my software was locking up occasionally when reading a disk. It was locking up in the “read” portion of the code because...

121 views

Amiga-VSC Inactive

maybe a big problem, memory arbitration on FPGAs

So far, I’ve been using a user-selectable mux, with a physical switch, to control which process is connected to the single-port memory controller. If the switch is in one position, you can upload via USB a...

120 views

Amiga Floppy

sleep inversely proportional to the AFP and no more tokens

So I have figured one thing out. The more I work on the AFP, the less I sleep. At least that’s how it’s been over the last two nights. Two nights ago it was 3am, last night it was after 2am. Ideas come and...

119 views

Amiga Floppy

HD media, low-density format disks now readable by Amiga Floppy Project

Good news. Got my Teac FD235HFC291/s which is now discontinued. Just as Jens suggested, it works perfectly to read HD media that is formatted low-density. No need to cover the hole, etc, it just works. I read two...

117 views