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

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...

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...

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...

switching design from DRAM to ALTRAMs

So as my last couple posts alluded to, I’ve been having problems with my DRAM-based design. My controller isn’t dual-port. And I’ve been trying to wrap my head around a time-slot method for arbitration...

Launch of HOPE Badge Computer project

This is the first post of many in this category. We have a project page giving the general goals of the project, but most of the hands-on action will happen here in the blog posts. For the latest status, reading these...

Interesting article and comments

Someone on sci.electronics.design mentioned the following article: This is a Floppy Disk Data Separator Design Guide for DP8473 which is a floppy disk controller like the infamous NEC 765 controller.  It’s a...