# Dev notes — 2023-08-10

- [x] Name it "Cardiograph"
  - homage to CARDIAC
  - (and cardboard)
  - and the special feature is that unlike other paper computers, this one has a graphical display

- art note: "performing computation"

## Keypad (and memory map)

- [ ] Copy the CHIP-8 approach: one memory location that stores the current key pressed
  - (Only one key can be pressed at a time)
  - And then do a bitmask-y thing for the secret advanced mode, to add the ability to detect multiple simultaneous keypresses

## Display (and memory map)

- Move display to $10?
- Then $00 could contain a jump to the start of code, and we wouldn't have this strange "IP doesn't start at 0" situation
- But, this might feel more complicated, and it would make working with the display a little less elegant...
- C64 has random stuff at $0000
  - How does the C64's PC get initialized ??

## (Moved from readme:) Nice features that didn't fit

- Hop `IF<` and hop `IF>`
- `MUL` and `DIV`
- Rotates and shifts

## (Moved from readme:) Possible features, maybe someday

- Timer (for a version in software/electronic-hardware)