TTL Computer

References

Project

  • Emulator Running

The most amazing vintage computers I recall were the ones that students named Bill V and Kellee C built from scratch. > Those should be in a museum. > Out of curiosity do you still have yours?

I still have the case you built for me along with the 12 bits wide front panel of LED's and switches. I had been using it as a box for a SWTP SS-50 computer. The original slit-n-wrap TTL everything boards have been salvaged and maybe even discarded. I don't remember seeing them in decades.

I do want to rebuild it:

1. build a software emulator
2. Wirewrap it so it does what it used to do in the silver box
3. Add a "coprocessor" like a rPI so it can do a lot more.

My plan for the Sphere is about the same. I have a 6800 emulator - so it should be hard to add the 1K ROM and minimal CRT to have a model software Sphere.

Then wirewrap a real Sphere model. Just getting it running the Itty Bitty tiny basic would be a blast.

I have the original Sphere keyboard in the garage here and I believe Mike H. has the original CPU board. The Memory (16K) and interface boards were unfortunately discarded. I remember the day I put the memory board in the garbage can at the trailer park in Bozeman.

TTL Computer

Do it in a cpld: http://www.bigmessowires.com/cpu-in-a-cpld/
Four bit TTL: http://www.bigmessowires.com/nibbler/
68000 booting uClinux https://www.youtube.com/watch?v=GJmPS3jMwD4

http://www.youtube.com/watch?v=0aERZuW9KhM
http://www.waitingforfriday.com/index.php/4-Bit_Computer
http://3.14.by/en/read/homemade-cpus - Including Mark 1 Forth computer http://www.aholme.co.uk/Mk1/Architecture.htm
http://www.homebrewcpu.com/
http://cpuville.com/
http://hackaday.com/2012/04/20/building-a-computer-with-discrete-transistors/
http://www.cpushack.com/2015/06/27/the-16-bit-transistor-level-megaprocessor/ - another Transistor computer
https://trmm.net/ - Trammel Hudson - Retro computing projects - https://trmm.net/Category:Retrocomputing

Other old computers

- http://www.rogtronics.net/blog/?p=28 Transistor PDP-8 clone

Scelbi Mark 8

- http://8bitaficionado.com/2011/08/17/bringing-back-the-scelbi-8h/
http://8bitaficionado.com/titus/mark8b.html

Microchroma 68 - 68008

Sphere One

SS-50

Radio Shack Color Computer

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