Gigatron Hackers

Sending a kit costs us a bit over an hour of effort. That is our time amortised over batches, if you just consider the parts logistics, mail handling, accounting, and of course the parts counting and packing. But we've gotten quite good at it. (Well, Walter has. My skills are lagging.) There are a c...

Here's a screenshot of the settings I used on my Macbook. I used norgate's own GitHub repo, opening BabelFish.ino as the project (PS2.ino is only a module for that sketch, it gets included automatically). It worked first time, and I don't recall specific compiler warnings, or any excess of them. Hop...

A little bird slipped this under my door today: a cute 16-pinner that might work as a proper resolution doubler. The idea is to clock the RS flip flops at 12.5 MHz on /CP. Feed the 6 color bits into the multiplexers, get 3 colors bits out in two phases. The remaining flip flop and 2-to-1 multiplexer...

As of yesterday, DEVROM itself can detect a memory card during reset. When detected it will continue to boot from there instead of jumping to the built-in main menu. This means you don't need the Arduino route anymore when playing with the expander. Naturally everything still needs refinements. But ...

The ATtiny85 has just 512 bytes of EPROM to work with. But if you hookup an Arduino, you'll have more storage there. Even better, you can then bypass the EPROM entirely and send the whole BASIC program back to your laptop/PC over the serial port. Just first enter terminal mode for that with BabelFis...

I doubt Drass is reading this forum. But you can propose your enhancement in the design thread on the 6502 forum: http://forum.6502.org/viewtopic.php?f=4&t=3493

Adam @iNimbleSloth just published what must be the quickest Gigatron build ever

https://youtu.be/2-B4FK_AdDM
Duration: 14m58s


I can't get enough of that mesmerising soldering of DIP rows.

This just surfaced: a very entertaining presentation by Drass on his TTL implementation of the 6502, 65C02 and 6510. It can run at 20 MHz, which is on par with the TK20 from the 1980s ( link , link [German] ). Very worthwhile to watch. https://www.youtube.com/watch?v=dB3P5tt4gnE Duration: 28m42s C74...

Here's an idea: I believe a simple frame grabber can be constructed that fixes the issue of losing video when lowering the clock rate (or stopping it). All required signals are on the OUT chip already: 8 data bits and the clock. In essence such an adapter needs 128K of RAM and two address counters o...

My favourite method to do cosines and sines with just integer math. 'Plot cosine 10 cls 20 input p:if p<1 goto 20 30 u=50*100:v=0:c=0 40 for x=0 to 159 50 y=68-u/100 60 poke y*256+x,c 70 u=u+v:v=v-u/p 80 next x 90 c=c+23:goto 40 Cosine.jpeg It's stable in the sense that it seems to maintain its ampl...