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.
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
Red this post by chance but very very interesting link!roganjosh wrote: ↑Fri Jan 08, 2021 11:11 am http://files.righto.com/calculator/sinc ... lator.html
Nice story, nice engineering work and nice emulator (with on/off switch as a cherry)!
Thank you for sharing!