(note) 2023-08-21 - Create dev note

notes/2023-08-21--dev-notes.md

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+# 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