qu 0x0d status equ 0x03 org 0x00 main movlw 0xff tris portb movlw 0x00 tris porta clrf porta start clrf left clrf right clrw btfss portb,7 goto bit6 movlw 0x08 addwf left,f bit6 btfss portb,6 goto bit5 movlw 0x0
qu 0x0d status equ 0x03 org 0x00 main movlw 0xff tris portb movlw 0x00 tris porta clrf porta start clrf left clrf right clrw btfss portb,7 goto bit6 movlw 0x08 addwf left,f bit6 btfss portb,6 goto bit5 movlw 0x0
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
Related questions
Question
Make a system flowchart of this code.
porta equ 0x05
portb equ 0x06
left equ 0x0c
right equ 0x0d
status equ 0x03
org 0x00
main movlw 0xff
tris portb
movlw 0x00
tris porta
clrf porta
start clrf left
clrf right
clrw
btfss portb,7
goto bit6
movlw 0x08
addwf left,f
bit6 btfss portb,6
goto bit5
movlw 0x04
addwf left,f
bit5 btfss portb,5
goto bit4
movlw 0x02
addwf left,f
bit4 btfss portb,4
goto bit3
movlw 0x01
addwf left,f
bit3 btfss portb,3
goto bit2
movlw 0x08
addwf right,f
bit2 btfss portb,2
goto bit1
movlw 0x04
addwf right,f
bit1 btfss portb,1
goto bit0
movlw 0x02
addwf right,f
bit0 btfss portb,0
goto check
movlw 0x01
addwf right,f
check movf left,w
xorwf right,w
btfss status,2
goto compare
movlw 0x02
movwf porta
goto start
compare movf left,w
subwf right,w
btfss status,0
goto agreatb
bgreatea movlw 0x01
movwf porta
goto start
agreatb movlw 0x04
movwf porta
goto start
end
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