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...

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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...

Performance of the Hope Badge Computer

I’ve just managed to get some key components working this year, and as a result, the machine is becoming more usable. I wanted to measure the performance of this Frankenstein machine. Ideally, I’d use...

RTC Progress

RTC appears to be working and keeping the date and time across cold-starts. I picked the Epson RTC-72423 which is about a $6 chip, but is obviously directly compatible with the OKI Semiconductor MSM6242B.  The design...