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--- spo600:assembly_language [2024/04/16 18:10] – external edit 127.0.0.1
+++ spo600:assembly_language [2025/02/19 16:38] (current) – [Assembly Language] chris
@@ Line 3: / Line 3: @@
 //Assembly language// is a [[Symbol|symbolic]] representation of [[Machine Language|machine language]]. It is therefore very [[Portable|architecture-specific]].
-Each instruction is represented by a short mnemonic word such as "LDR" for //Load Register//, "MOV" for //move//, or "MUL" for //multiply//, followed by (optional) arguments. The [[Addressing Mode|addressing mode]] is implied by the format of the arguments. Different [[Assembler|assemblers]] use slightly different syntax.
+Each instruction is represented by a short mnemonic word such as "LDR" for //Load Register//, "MOV" for //move//, or "MUL" for //multiply//, followed by (optional) arguments. The [[Addressing Mode|addressing mode]] is implied by the format of the arguments. The instructions and addressing modes available are defined by and specific to a particular target processor. Different [[Assembler|assemblers]] use slightly different syntax, even for the same processor.
 =====  Examples  =====
@@ Line 98: / Line 98: @@
 <code>
- define SCINIT $ff81 ; initialize/clear screen
+ define SCINIT $ff81    ; initialize/clear screen
- define CHROUT $ffd2 ; output character to screen
+ define CHROUT $ffd2    ; output character to screen
- 	JSR SCINIT	; clear screen
+ 	JSR SCINIT	; initialize and clear the screen
  	LDY #$00	; set Y index to zero
  loop:	LDA msg,Y	; get a character