May 2024
Intermediate to advanced
889 pages
30h 8m
English
book
The X 86 Microprocessors: Architecture, Programming and Interfacing (8086 to Pentium) 2nd Edition by Pearson
by Lyla B. Das
Content preview from The X 86 Microprocessors: Architecture, Programming and Interfacing (8086 to Pentium) 2nd Edition by Pearson
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PERIPHERAL INTERFACING–I 9-29
OUT CR, AL ;send it to control register
MOV AL, 00 ;address corresponding to IN0
OUT PB, AL ;send it to Port B
MOV AL, 00 ;BSR control word to clear ALE (PC
0
)
OUT CR, AL ;send it to the control register
MOV AL, 01 ;BSR control word for setting ALE (PC
0
)
OUT CR, AL
MOV AL, 03 ;BSR control word to set SC(PC
1
)
OUT CR, AL
CALL DELAY ;call a delay
MOV AL, 00 ;BSR control word for clearing ALE(PC
0
)
OUT CR, AL
MOV AL, 02 ;BSR control word for clearing SC(PC
1
)
OUT CR, AL
AGN: IN AL, PC ;read in the contents of Port C
ROL AL, 1 ;rotate left to check if PC
7
is high
JC AGN ;if carry ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.