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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

Intronix LA1034

I’m seriously looking at the Intronix LA1034 logic analyzer. It’s a USB PC-based logic analyzer.  34 channels, samples up to 500mhz, and has nice trigger options, etc.  I’ve downloaded the software...

224 views
Amiga Floppy

working cause of bit errors

I think I’ve stumbled on something. I don’t think I’m capturing enough data. 13,824 has been my magic number forever.  It was larger than the 13,800 that Marco used in afr.c.  But I’m beginning...

209 views
A501 Replacement

Parts ordered for the A501 replacement card

I placed an order yesterday for some prototyping parts to get this project off the ground. Some of the key parts are: ISSI 256kx16 SRAM chips. IC SRAM 4MBIT 25NS 44TSOP A surfboard to do 44-pin TSOP II to DIP.  Wish me...

207 views
Uncategorized

Armiga Project

Here’s a cool project that I have some involvement with, the Armiga Project. This is basically an ARM-based emulation platform for the Amiga 500 that uses normal Commodore Amiga floppy disks! Pretty cool, and I...

200 views
Amiga Floppy

Anatomy of a flux transition

I wanted to put up an image that displays an actual flux transition pulse coming off an amiga floppy disk whose data was encoded in MFM.

CLICK ON THE IMAGE TO DISPLAY A FULL RES VERSION.

195 views
Badge Computer

LCD Test image and pixel-level detail

So I’ve managed to get a semi-working test pattern image up on the LCD. Here are a couple shots: If we zoom in about 10 times, we can see how the LCD really works, on an individual pixel level: Pretty challenging...

180 views