Transcript AVC기반 멀티미디어 프로세서 칩 개발

Lecture 11
Z80 Instruction
Hong Youpyo @ DGU
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C vs Z80 Program Body
C Program
Z80 Program
#include <stdio.h>
Main ( ) {
.
.
.
}
ORG 0000H
.
.
.
END
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Two Types of Instruction

Pseudo-instruction
 Assembler
(or Compiler) Directive : ORG,
END, …
 Similar to #include in C.

Instruction
 Normal
instructions : LD, OUT, JP,…
 Similar to printf in C.
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Compiler and Assembler
Compiler
A tool that converts human-friendly language based
code to a binary code
Assembler
A tool that converts assembly code to a binary code
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compile
assemble
Z = A + Y;
High-level
Language
Assembly
Language
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Machine
Language
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ORG

Format : ORG
ADRS

Example : ORG 8000H
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END

Format : END
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Addressing Mode

Immediate operand
 Operand

is data itself (like a constant)
Direct address
 Operand
is address (or register name) for the
real data

Indirect address
 Operand
is the address of the address for the
real data
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LD (Load)

Format : LD target source
Ex) LD A, 00000001B
immediate operand
 Ex) LD (8000H), A

( ) for an operand means
direct addressing.
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OUT

Format : OUT target source

Example : OUT (00000111B), A
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