cardiograph-computer/notes/2023-08-10--dev-notes.md

Dev notes — 2023-08-10

• 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 detecut 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 ??