µCPU Documentation

Backplane

Backplane

In Progress

Note	Backplane (rev 1.0)[PDF] [SVG] [PNG]

General Purpose Register Schematic

Figure 1. General Purpose Register Schematic

Power
- Add voltage supervisor LP3470 to provide consistent starting state
Reset
- Design circuit
- Wait for stable power
- Low power monitor
- …?
- https://www.grappendorf.net/projects/6502-home-computer/reset-circuit.html
- https://www.smbaker.com/z80-power-on-reset-circuits
- https://blog.mark-stevens.co.uk/2020/01/ne555-power-on-reset/
Timer
- Better 555 circuit with 50% duty cycle
- https://ohmslawcalculator.com/555-astable-calculator
- https://www.multisim.com/content/d5VPrhr8otpMN6bm34r4JM/555-adjustable-frequency-50-duty-cycle-astable-multivibrator-charge-by-bjt-pull-up/
- https://www.electronics-tutorials.ws/waveforms/555-circuits-part-1.html
- Crystal
Controls
- Better denounce https://www.eejournal.com/article/ultimate-guide-to-switch-debounce-part-5/
Bus pull up/down where appropriate
Add bare test points for all CLK and /CLK, etc points for future bodges :)

References