A TTL approach to the HP-35

[teenix]

(05-15-2021 07:20 AM)PANAMATIK Wrote:  

(05-15-2021 06:40 AM)Alejandro Paz(Germany) Wrote:  This time I want to re build the HP-35 using TTL logic....

Nice idea! Did you already calculate how many gates and flip flops are needed? Next step: only use transistors. only vacuum tubes, only relays, reading the HP-35 ROM code from hard coded 768x10 bit magnetic core memory. I can see the Zuse Alejandro ZA3, the first relays computer with trigonometric and exponential functions.

Bernhard

...or diode logic like 9100 series :-)

cheers

Tony