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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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Amiga QB Extract recently updated

There was a HDD backup utility for the Commodore Amiga called Quarterback, part of a suite of tools called Quarterback Tools. This utility allowed you to backup existing files on your HDD, compress and/or encrypt them...

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...

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...

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.

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Yay! Initial shots from the VSC!

So I got everything hooked up tonight, and the good news is that I have definitely made some progress! It appears to work, although the video is currently scrolling with multiple video problems, but I definitely have...

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...