4/9

TRANSLATING ASSEMBLY CODE FROM HC05 TO ST7

4.1 VARIABLES

It’s recommended to write all your variables in a file (called variable.asm for example) and to

declare those you want to be public in a file called variable.inc as shown in the following ex-

ample:

variable.asm:

st7/

TITLE “variable.asm”

MOTOROLA

; Motorola format (default), other formats are

also available:

; Intel, Zilog or Texas.

BYTES

; this directive means that the addresses of the

following

; variables are bytes and not that the variables are bytes.

segment ‘ram0’; this directive means that the following variables are going

to be

; ORG RAM0

; placed in ram0 from $00 to $FF .

; section .ram0

; (segment byte ‘ram0’ at 00-FF : this line is in the map

file)

var1

DS.B

1

; 1 byte space is reserved in ram0 for var1 which

is local.

; DEFS

; corresponding MOTOROLA directive.

.var2

DS.W

1

; 1 word space is reserved in ram0 for var 2 which

is

; public (a dot is placed just before the variable

name)

WORDS

; this directive means that the addresses of the follow-

ing

; variables are words.

segment ‘ram1’

; this directive means that following variables are

going to be

; ORG RAM1

; placed in RAM1 from $100 to $13F (for the ST72251)

; section .ram1

.var3

DS.B

1

; 1 byte space reserved in RAM1 for this public

variable.

; DS or RMB

segment ‘rom’

; this directive means that the following variables are

going to be

; ORG ROM

; placed in ROM.

; section .rom

.table

DC.B

$10,$AA,50,%11111010 ;table of values defined in ROM.

; BYTE or DB or DEFB or FCB

END