Chapter 18.

H8/500 Dependent Features

18.1. Options

as

has no additional command line options for the Renesas (formerly Hitachi) H8/500 family.

18.2. Syntax

18.2.1. Special Characters

!

is the line comment character.

;

can be used instead of a newline to separate statements.

Since

$

has no special meaning, you may use it in symbol names.

18.2.2. Register Names

You can use the predefined symbols

r0

,

r1

,

r2

,

r3

,

r4

,

r5

,

r6

, and

r7

to refer to the H8/500 registers.

The H8/500 also has these control registers:

cp

code pointer

dp

data pointer

bp

base pointer

tp

stack top pointer

ep

extra pointer

sr

status register

ccr

condition code register

All registers are 16 bits long. To represent 32 bit numbers, use two adjacent registers; for distant

memory addresses, use one of the segment pointers (

cp

for the program counter;

dp

for

r0

r3

;

ep

for

r4

and

r5

; and

tp

for

r6

and

r7

.