Sinclair Scientific calculator

[roganjosh]

Having recently received a gift of a TI DataMath/Sinclair Scientific hardware emulator kit I built it yesterday (it's largely a SMD build).

https://simpleavr.github.io/tms0800/index.html

It works nicely (you hold key 7 whilst powering-up for Sinclair Scientific mode). What prompted me to post is that the web site links to a fascinating short history plus reverse-engineering of the Sinclair Scientific by Ken Shirriff.

http://files.righto.com/calculator/sinc ... lator.html

As well as technical details it also has a software emulator at the top which shows the opcodes being used during the internal calculations.


Alan

[Moggy]

I have always liked reading Ken Shirriff's works especially his reverse z80 engineering pages and the calculator emulator page is very good and informative.

These pages are also quite good I think..

http://www.righto.com/2014/10/how-z80s- ... -down.html

http://www.righto.com/2013/09/the-z-80- ... ow-it.html

[marste]

http://files.righto.com/calculator/sinc ... lator.html

Red this post by chance but very very interesting link!
Nice story, nice engineering work and nice emulator (with on/off switch as a cherry)!
Thank you for sharing!