Käsuformaadid ja käsusüsteem (Instruction set)
An instruction set, or instruction set architecture (ISA), describes the aspects of a
computer architecture visible to a programmer, including the native datatypes,
instructions, registers, addressing modes, memory architecture, interrupt and
exception handling, and external I/O (if any).
Kõrgtaseme keel
Assembler keel
masinkood
Andmeedastus käsud Data transfer instructions
MOV, LOAD, STORE, ...
Aritmeetika-loogika käsud Arithmetic-logic instructions
AND, OR, ADD, SUB, ?
Hargnemiste (siirete) käsud Branch instructions
JMP, CALL, RET, ?
Pinumälu, sisend-väljund seadmete ja protsessori juhtimine
Stack, I/O, Machine control instructions
PUSH, POP, IN, OUT, NOP, ...