Sharp MZ-5500 Tehnical Manual

5-5. 1/0 port interfacing examples (user's job)
(1) 16-bit input port (1/0 address: l80H)
Machine language
Lsz44
programming example:
6
6
I ö Ace.
Aq
A8
A7
Ab
AS
A4-
~
loRe.
D15
I
°Word input
~
MOV
DX, 180H
Dra
IN
AX,
DX
°Low order byte input
HOV DX,
180H
IN
AL, DX
°High
order byte
input
D7
MOV DX,
18lH
~
IN AL,
DX
PS
(2) 16-bit output port (1/0 address: 320H)
°When only ward write is done
°Word output
MOV DX,
l80H
MOV
M, --
OUT
DX" AX
°Insignificant date
:f) /5
S·
D8
will be stored in the ,
other byte when the
byte write is done.
4~
ALt ---1
D7
,ÖW!.. - --td
S
C
D~
~--
A~
A9
A7
Ah - - ---Ll
(3) ~len the high order and low order bytes are written independently
°Word output
M V DX, ,180H
6 AA, M V
OUT
D?<.,
AX
°Low order
byte
output
MOV DX, 180H
MOV
AL,
OUT
DX,
AL
° High
order byte
output
MOV DX, 1.8lH
MOV AL,
OUT
DX,
AL
'-f5v-
Al
A8
117
Ab
-4 ~
ALt- ----I
!ö ~-----
BHE
A~
1) 15
~
DS

Sharp MZ-5500 Specifications

General

Brand	Sharp
Model	MZ-5500
Category	Desktop
Language	English