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

A501 Replacement Inactive

Found problems with incorrect footprints used for some chips

So I received all of the SMT parts today, and attempted to verify that I’ve used the right footprints for the parts. This was a worthwhile effort because I found a few different problems. Also, digi-key shipped me...

44 views

Amiga Floppy

looking at the code this a.m.

Welp, I decided to take a look at my code today, although I can’t actually implement anything until after I get home from work. 🙂 Not sure if I mentioned this eariler, but I’m now padding the data sent from...

43 views

Amiga Floppy

mid-january status

So here’s where I’m at: I know my memory read and write routines are good. I calculate a checksum as I’m writing the data, and on the output of that data to the PC, I also calculate the checksum. ...

43 views

Amiga Floppy

SX problem is double-ones, ISR code & description

While I shouldn’t be surprised, my SX hardware issue is related to double one’s, where the SX sees transitions back to back, and writes back to back 1’s into memory. This is assuming there aren’t...

43 views

Amiga Floppy

current read problems

It seems as though when I have a read problem, its normally minor, and is a single bit error. I notice that the errors have a tendency for 0s to be incorrectly interpreted as 1s. So I get AB instead of 2B, AB instead of...

43 views

Amiga Floppy

Found another UART timing issue

Ok. A post or two back, I mentioned that I wanted to rework the receive UART because it wasn’t working perfect. I fixed that, and now it’s reliably receiving. I also mentioned that my sending uart code was...

43 views

Amiga Floppy

interesting results

OK, I’ve applied the “double 1’s” fix that I talked about earlier today. This definitely helped things. I think my results are quite possibly the best I’ve seen them yet. Now, my SX...

42 views

Amiga Floppy

Good news good news. First perfect .adf

Good news indeed! I’ve managed to create a fully functioning .ADF from a floppy. I matched the output from my hardware/software combination with a “transdisk” output, and it matches exactly. I used...

41 views

Amiga Floppy

going around the problem

Welp, I’ve ordered a new, but cheap ($5.99!) regular PC floppy drive from newegg.com. I like this end result much better anyways. PC drives are much more available, popular, cheap, and so on. was worried about...

41 views

Uncategorized

migrated website to a new host

Over the last week, I migrated this blog to a new hosting provider. GoDaddy was such a pig and the site just ran like molasses when hosted by them. I couldn’t be happier with the switch that I’ve made, but I...

41 views