JohnSwenson wrote: > My first computer was an 8080 based homebrew monster. I spent a month > wire wrapping that thing after school. I had an OLD Tecktronix tube > based scope I used to debug it. The first incarnation just had the > infamous switches and lights, but it WAS a computer! 8080s were still > $75 back then, so I had to be darn sure I wasn't going to fry it!
Ahh, yes. Substitute the 8080 for a 6800 and the Tectronix for an even older Heathkit scope, and you have my story... > The big improvement came when I got a cassette tape recorder running as > non-volatile storage. The very first display was a vector display using > the scope and a couple 8 bit DACs, very crude but it worked. A year > later I built a color TV interface and wrote a couple video games for > it. It was done all with SSI and MSI TTL, a big board crammed full of > parts all wire wrapped. I still can't believe I did some of that stuff > back then. I went almost the same path - first a 7-segment 4 + 2 digit hex display, then the 2 R-2R ladders on a parallel port as DACS doing X-Y, and then a video display - in my case black and white, 16 lines of 64 chars. Oh, and an expansion of RAM from 512 bytes to 2K... :) ------------------------------------------------------------------------ Julf's Profile: http://forums.slimdevices.com/member.php?userid=42050 View this thread: http://forums.slimdevices.com/showthread.php?t=98544 _______________________________________________ unix mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/unix
