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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21-8
THE
x86 MICROPROCESSORS
ACALL COMMAND ;call the COMMAND procedure
ACALL DELAY ;call a delay
MOV A, #0EH ;command for display on, cursor on
A CALL DELAY ;call a delay
MOV A, #01 ;command to clear LCD
ACALL COMMAND ;call the COMMAND procedure
ACALL DELAY ;call a delay
MOV A, #80 H ;cursor at line 1, position 1
ACALL COMMAND ;call the COMMAND procedure
ACALL DELAY ;call a delay
STRT: MOV A, #'Y' ;move to AL, the ASCII of 'y'
ACALL DAT ;call the DAT procedure
ACALL DELAY ;call a delay
HERE: SJMP HERE
COMMAND: ;procedure named COMMAND
MOV DISP, A ;send data in A to port
CLR RS ;RS = 0 for selecting command
register
SETB EN ;EN = 1
ACALL DELAY ;call the delay program
CLR EN ;EN = 0
RET
DAT: ;procedure ...
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