Home example 2

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

4 comments

Latest articles

Amiga-VSC Inactive

sampled some TI chips and bought some surfboards

One of the minor hurdles that I have to deal with is how to connect the output from the amiga video, which is 5v to the FPGA at 3.3v. I was originally going to do a custom circuit board but that has turned into a pain...

81 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...

81 views

Amiga Floppy

Am I reading MFM wrong?

I’m beginning to think that I don’t fully understand the signalling coming out of the drive. I understand the concepts behind MFM (I think), but the actual application to this project, I’m not so sure...

79 views

Amiga Floppy

proof of concept works

Today is the first day in months that I’ve made what I consider good progress. I am now able to read any track(so far) off of any disk with 100% success including checking and relying on the checksums. I read...

78 views

Amiga Floppy

pullups

These are all 2us per division on the scope. Top trace is the actual MFM, bottom trace is the entering and exiting of my ISR. You should see an entry into the ISR for every falling edge, and every ~2us afterwards. 1k...

78 views

A501 Replacement Inactive

Finalized schematic and PCB is coming along nicely

SMT parts will be ordered soon. Once they arrive, I’ll double-check the pad design/placement is good, and then order the PCBs! Everything is coming along swimmingly and I should have a prototype PCB in a few...

77 views

Amiga Floppy

further development on the AFP

I’m about to bring a new member of my family into this world. As a new proud parent, I’m completely unsure about what this means in terms of time, dedication, and so on. I’m sure I’ll have less...

77 views

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”...

76 views

Amiga Floppy

AFP 0.2 WIP SX code

I’ve put some work into cleaning up the SX code tonight. I’ve removed some code sections no longer needed, and added documentation where it was lacking. Code should be commented pretty good. I’ve also...

76 views

Amiga Floppy

today’s successes

I really stumbled on some stuff, and I think I have traction on a couple of problems. 1. My sizes are absolutely perfect. For me, this is a big milestone. This tells me alot. I’m getting perfect distances between...

75 views