MICROFORUM

If the calculator is to be aimed at learning hardware such as adders, multipliers and logic, then building the calculator from TTL or CMOS 4000 digital circuits is the way to go. If the computer is intended to be more focused on software development such as mathematical calculation algorithms, then ...

You can use both methods, resistive divider or IC voltage level shifter. The IC translators are safer and more professional.

I'm looking for information on digital circuits manufactured by NEC and Hitachi in the late 1960's. These circuits are commonly used in old digital calculators from the late 60's or early 70's.

Hi, do you know the control codes for remote control over GPIB?