techtravels.org

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...

Latest articles

Schmitt Trigger

Welp, after talking with some smart guys on forums.parallax.com, it looks like the Schmitt Trigger feature on the SX is going to allow me to get rid of my 74HC132 that I’ve spent at least a couple hours messing...

finally got some work into the VSC

Ok, so I’ve finally got some work done on this tonight. I’ve decided to go to a 4-line buffer system because it’s a more round number than 3 — makes everything easier to deal with. I’ve...

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...

logic analyzers

I’ve recently received a couple emails on additions to the logic analyzer page. Once I get some time to check them out, I’ll make the corrections. I’ve been super busy with life — switched jobs...

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...

more testing

so I put the amiga floppy back on the amiga, and the amiga reads disks no problem.  Glad to see that my drive hadn’t fried through all my messing around. I haven’t seen valid MFM coming from the drive in so...

sync on data

The more and more I play with this I find that I’m limited with visibility. Its tough to debug when you constantly have to deal with this overhanging problem : The data arrives at my hardware, and to the PC...

Current updates

Wow. I can’t believe its been 20 days since my last post. Man have I been slacking. School has started up again, and add a week I was away on business/pleasure and there you have it. Here’s where I’m...