Atari 800 Manual del operador descargar pdf (Pagina 22)

Examplesr

10 AND

110 F,OR

1110 STA

$3C26,x

20955,Y

Non-Indexed

Indireca

operands

ln Eeneral.

indjrecl operand

wrilten

with

pa-rentbeses The address

wirhin

rbe-Dareniheses

i" an

i;rermediare

address

which itself

con(ains

Ihe effective

addrless.

The onlv instrudion

with a non-indexed

indirecl

operand

isJump

In'

dired.

The

operand

number enclosed

parentheses.

The

parcnlheses

in the

operand

enciose a

number or an

expression

lhar

is inlerpreted

ae an

inter-

mediate addr€ss.

Dxamples:

JMP

t$6000)

JMP

(ABS)

JMP

(7430)

JM?

(ABS+256-BYJ

Indeied

Indtiect

oPerands

An indexed

indftect

instruction

us€s register

The operand

is wdtten

(-,Xl

Examples:

rNc

($99,X)

Indirect Index€d

OPerands

indtect indexed

instruction

uses

Y. The operand

wdtt€n

(-)'Y

Exarnpld:

10 LDA

I$28),Y

110

.CMP

($E5),Y

1110 ORA

(BY),Y

tndexed

Page zero

operandg

A zero

page indexed

operand

is wrirlen

-.X

-.Y

Eramples:

10 lNc

$34,X

110 STX

$AB,Y

1110 I-DX

BY,Y

string

operands

ODerands

pai-ls

ol operands

enclosed

double

quotaLion marks are

rr:anslared into

rhe ATASIII

codes

of lhe characiers

berween

lhe

quota(ion

marks.

The

use ofsuch

operands

musl ofcourse

be appropriate

to lhe

U?e

insrruclion or

diredive io

which they

are appended.

Examples:

10 ADDR

.BYTE

..9+1

TEN"

Ex€cutio[ ofthis

direciive

causes

th€ ATASCII

numb€rs

coresponding

"9",

''',

erc.)

io be srored

al successive

localions

slarJing

al ADDR.

Note.lhal

lhe

ATASCII

represenlation

ol any

character

except rhe

quoration mark

(")

can be

srored

wirh lhe.BYTL

directive

having a

slring operand.

1 2 ... 17 18 19 20 21 22 23 24 25 26 27 ... 91 92

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Atari 800 Manual del operador Pagina 22

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