I want to find out if my purchased 8085 works. I'm thinking of:
- pulling down the data bus and interrupt lines (equivalent to NOPs)
- using a slow RC clock (1 Hz or so)
- drive LEDs through BJTs with the IO/~M and status pins (and the address pins maybe) so I can monitor each T-state and see if everything's fine.
The problem is I don't know if 1 Hz is too low, that it will hinder the 8085 operation. There's also this, from the datasheet:
There was no mention of this low frequency limit when they talked about using an LC clock.
- So is this limit RC-related and why?
- Is this a hard limit? What would happen (if anything) if I went ahead and ignored it?
- If I can't use this option, I'd appreciate any alternatives that can yield the same or close to 1 Hz so I can track the states of each instruction cycle.
- Can a basic "button and pull-up resistor" combo be used to generate the clock pulses safely, even if its aperiodic?