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

2-wire digital voltage display accuracy

I had a few needs to for a simple voltage display that can handle the range of +5v to +12v. There’s a few different applications like displaying the state of a battery, a state of a power supply and so on. I was...

My new i7-4790k Desktop build

I needed some more horsepower for my FPGA compiles, and because it’s been so long since my last PC build, I decided to take advantage of some free time I had, and build a new machine. This machine is a quad-core...

on recent disk reading results

(this was posted to Classic Computer mailing list, please disregard if you’re on the list.  I think this is an important topic) The last two nights I’ve been busy archiving some of my Amiga floppy collection...

status updates

I’ve been more active on the project than the posts have illustrated. I’ve been working on a few different things : Been trying different PLL solutions, examining how Paula does it, and actually analyzing my...

Updated hope badge computer

Here’s the current image for the Hope Badge Computer, which I really think needs a new name. It’s not quite a badge, although the intention is for it to be portable. Last night, I partially integrated the...

New Reverse Engineering PALs page

I’ve recently put a new page online on the site. It hosts a basic outline on different techniques to enable one to reverse engineering a PAL, and produce a modern equivalent. Right now, there are about a dozen...

results from adding the PJL

So, as I mentioned in another post, I added Jim Thompson’s phase-jerked-loop to the project.  Phil had good luck using it with his DiscFerret, but it really didn’t help me.  My problem disks are still...