Is something wrong with my code?
It's a tower of hanoi in assembly language
Code:
BR main
n: .EQUATE 5
start: .EQUATE 4
dest: .EQUATE 3
spare: .EQUATE 2
msgMove: .ASCII "MOVE \x00"
msgTO: .ASCII " to \x00"
hanoi: LDA n,s ;loads the number of disks
CPA 0,i ;compares it if it's 0
BRLE endHanoi ;Else statement
;
LDA n,i ;loads the number of disks
SUBA 1,i ;subtracts one
STA -2,s ;stores it
LDBYTEA start,i ;loads start
STBYTEA -3,s ;stores start
LDBYTEA dest,i ;loads dest and store it on the stack
STBYTEA -4,s
LDBYTEA spare,i ;loads spare and stores it on the stack
STBYTEA -5,s
SUBSP 5,i ;allocates bytes
Call hanoi ;recursive function
ADDSP 5,i ;deallocate bytes
STRO msgMove,d ;this whole block of codes
STRO start,d ;are the outputs
STRO msgTO,d ; Move X to Y
STRO dest,d
Charo '\n',i
LDA n,i ;loads the number of disks
SUBA 1,i ;Subtract one from it
LDBYTEA spare,i ;loads spare and stores it on the stack
STBYTEA -3,s
LDBYTEA dest,i ;loads dest and stores it on the stack
STBYTEA -4,s
LDBYTEA start,i ;loads start and stores it on the stack
STBYTEA -5,s
SUBSP 5,i ;allocates bytes
Call hanoi ;recursive function
ADDSP 5,i ;deallocates byets
endHanoi: Ret0 ;return to main
msgInput: .ASCII "Enter number of disks: \x00"
disks: .EQUATE 0
main: STRO msgInput,d ;outputs the message
DECI disks,s ;inputs the # of disk
LDA disks,d
STA -2,s
LDBYTEA 'A',i
STBYTEA -3,s
LDBYTEA 'B',i
STBYTEA -4,s
LDBYTEA 'C',i
STBYTEA -5,s
SUBSP 5,i
Call hanoi
AddSP 5,i
.END
.STOP
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Linear Mode
