quartz/content/notes/07-6809-advanced.md

title	aliases	tags
07-6809-advanced		lecture cosc204

10 addressing modes

• implied inca
• immediate lda #$00
• extended LDA $31FE
• extended indirect LDA [$31FE] or LDA [HERE] points to a memory location which specifies another memory location
• direct LDA $ff or lda <HERE
• register trf X,Y
• indexed LDA $3111E, X use memory location that is the sum of the operands
  • LDA ,X
  • LDA $23,X
  • etc
• indexed indirect LDA [$10, X]
• relative BEQ HERE
  • BEQ does a short branch
  • LBEQ does a long branch
  • the value is relative to HERE
• program counter relative LDA TABLE,PCR ; A = the value stored at TABLE
  • if all memory references are relative, then the program cna be loaded anywhere is memory, and will still work. It is said to be relocatable