Sharp MZ-5600 - 13-3 Channel Description

°Software (in reference to the circuit example in the preceding page)
\j
CSEG
ORG 100B
MOV AL, 0
, OUT OAEll, AL
~\
MOV AL, 07H
OUT OAH, AL
I put
MOV AL, 40H ;Only high order
OUT 50H, AL ;4 bits are valid
OUT OCH, AL
Set DHA start
address to
40000H
I
MOV AL, 0
OUT 06H, AL
OUT 06H, AL
Se t DMA add ress
offset
MOV AL, OFFH
OUT 07H, AL
MOV AL, 7FH
Set DMA word
set DMA transfel
~i
OUT 07B, AL
size to 32KB
J
MOV AL, 47H
OUT OBH, . AL
CH3
MOV AL, 03H
OUT OAH, AL
Clear DMAC
eH] mask
MOV AL, 80H
OUT OAEB, AL
Li: IN AL, 40H
AND AL, 40B
JZ. i Li
MOV AL, 0
OUT OAEB, 0
XOR CX, CX
XOR DX, DX
INT 224
END
Enable
*1: IR-26 is used simply as an input port.
4q