test/fib.s


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; Name: fib.s
; Description: Computes the Fibbonacci sequence.
;
; Written in Sux Assembly
; by mr b0nk 500 <b0nk@b0nk.xyz>

; Variables for thread 0.
.org $1000
x:
.qword $0
y:
.qword $0
z:
.qword $0

; Variables for thread 1.
.org $2000
x2:
.qword $0
y2:
.qword $0
z2:
.qword $0

.org $0
init:
cps		; Clear the Processor Status register.

start:
lda #$0		; Clear the accumulator.
ldy #$1		; y=1.
sty.q y		; Store y into memory.

fib:
ldx #$0		; x=0.
ldx.q x		; Output the value of x.
adc.q y		; Add x with y.
sta.q z		; z=x+y
ldy.q y
sty.q x		; x=y.
sta.q y		; y=z.
lda.q x
bcs start	; Start all over again, if the carry flag was set.
jmp fib		; Otherwise, keep looping.

.org $8000
init2:
cps		; Clear the Processor Status register.

start2:
lda #$0		; Clear the accumulator.
ldy #$1		; y2=1.
sty.q y2	; Store y into memory.

fib2:
ldx #$0		; x2=0.
ldx.q x2	; Output the value of x2.
adc.q y2	; Add x2 with y2.
sta.q z2	; z2=x2+y2
ldy.q y2
sty.q x2	; x2=y2.
sta.q y2	; y2=z2.
lda.q x2
bcs start2	; Start all over again, if the carry flag was set.
jmp fib2	; Otherwise, keep looping.

; Set up the thread vectors.
.org $FF50
.qword init2
; Execute the program.
done