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

Flow control

I’ve gotten away thus far without any flow control. I just started noticing that my software was locking up occasionally when reading a disk. It was locking up in the “read” portion of the code because...

redesign of read routine

After skimming the patent I referenced in the earlier post, I’m starting to come to the realization that in order to have an effective floppy controller, I need to implement a decent PLL which can better track the...

Let the fun begin!@#!@#

 
Everything has arrived!  I think the first order of business is soldering this darn memory chip…. Not sure how hard this is going to be, but I’m going to give it a shot!@#

RXTX and Java

As I mentioned before, I’m using RXTX to do serial communication in Java since Sun has dropped support for serial communication under the Windows platform.  I want to revamp my read routines on the java side...

Current status updated

Current status updated I was originally going to use a Microchip PIC, but they are just too darn slow. I gave up on the idea of using the PIC as a one-chip solution, and tried to use it as just a clock generator feeding...

data rate vs throughput

Although I’m transmitting from the Parallax SX microcontroller to the PC via USB at a data rate of 2mbps, the actual throughput is much less.  First, there is some overhead, namely start and stop bits, which is...

Minor problems on techtravels.org email

I recently discovered a problem where email directed to techtravels.org accounts was bouncing. It’s been fixed. If you’ve emailed something over the last couple months and didn’t get a reply, please...

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”...

new face of the amiga floppy project

You’d think that with the lack of posts lately that I haven’t been doing anything. BUT, in fact, I’ve been quite busy. I now have the entire floppy project on one single circuit board, the SX28...