# Dev notes - 2023-08-21

## Goals for today

- graphic design
  - [ ] design: 80 col card template
  - see below
- printing
  - [ ] print: paper tape template
  - [ ] print: colour coding forms
  - [ ] print: 80 col card template

- see code/design commentary below

- (consider python (microbit) version of simulator)
  - maybe ask for e's input

## Imported notes from earlier

### 2023-08-18 cardiograph loose thoughts

- use binary encodes punch cards for cardiog progs in machine code
- try making a microbit based emulator
    - (microbit + hex keypad)
        - (machine code monitor like VIP…)
    - (+ tape input??)
- a4 template with full size 80 col card
- snake
- [ ] add simulator todo: pass asm line thru to cpu to print when debugging
    - asm: create a second array that stores every line with code (nor blank or comment only lines) + its line number
    - cpu: accept an optional debugging array, print line # and statement
- readme:
    - [ ] readme: rename (or split up?) mem map / peripherals section
    - [ ] ? readme: put 2 keypad charts side by side (they would fit on my phone)
- [ ] see paper notes on mem map


## 2023-08-19

- [ ] reconsider ISA order in light of supercat comment here
    - [Why didn't the 6503 have increment/decrement opcodes for A?](https://retrocomputing.stackexchange.com/questions/13023/why-didnt-the-6502-have-increment-decrement-opcodes-for-a)

- [ ] look at use of `*` or `.` in assembly
    - [What does "jmp *" mean in 6502 assembly?](https://retrocomputing.stackexchange.com/questions/7998/what-does-jmp-mean-in-6502-assembly)


## 2023-07-17 - cardiograph - worksheet for hand-assembling code… + other docs

- machine code quick ref (ops + short explanations + mnems)
- assembly quick ref (as above, plus assembler-specific syntax like constants)
- worksheet for hand-assembling