6502/6502-opcodes
1
0
Fork 0
mirror of https://github.com/mcanlas/6502-opcodes.git synced 2024-12-22 09:30:45 +00:00
Code Issues Projects Releases Wiki Activity
Exploring the visualization of 6502 opcodes
119 Commits 2 Branches 0 Tags 931 KiB
Scala 96.9%
Assembly 3.1%
8c5ae9c2bc
Go to file
Mark Canlas 8c5ae9c2bc basic looping
2020-08-16 11:33:49 -04:00
project add support for bit fields and enums 2020-08-15 17:04:16 -04:00
src basic looping 2020-08-16 11:33:49 -04:00
.gitignore just checking in 2018-05-05 14:23:21 -04:00
.scalafix.conf scalafix 2020-08-15 02:04:28 -04:00
.scalafmt.conf fmt 2020-08-15 03:52:11 -04:00
build.sbt add support for bit fields and enums 2020-08-15 17:04:16 -04:00
Jenkinsfile add jenkinsfile 2019-11-30 01:52:25 -05:00
LICENSE Create LICENSE 2018-05-11 18:03:32 -04:00
README.md simplify iterators 2020-08-15 17:34:33 -04:00

README.md

6502-opcodes

Addressing modes

  • Immediate: a value literal
  • ZeroPage: argument is an 8-bit address to the zero page
  • ZeroPageX: argument is an 8-bit address to the zero page, incremented by X without carry
  • ZeroPageY: argument is an 8-bit address to the zero page, incremented by Y without carry
  • Absolute: argument is an 16-bit address
  • AbsoluteX: argument is an 16-bit address, incremented by X with carry
  • AbsoluteY: argument is an 16-bit address, incremented by Y with carry
  • Indirect: argument an address (A); the effective value is an address (B) stored at that address (A); used only by Jump
  • IndirectX: argument is an 8-bit address; find a value at this address incremented by the value X
  • IndirectY: argument is an 8-bit address; find a value at this address; increment the value by Y

TODO

  • add mapping support
  • postfix operations to accumulator values
  • loops