https://schweigi.github.io/assembler-simulator/ assembler sign function

sign.asm

JMP start

R0: DB 140
R1: DB 255


start:
	CALL sign
	HLT

sign:
	PUSH A
	MOV A, [R0]
	CMP A,128
	JAE .positivo
	JMP .negativo

.positivo:
	MOV [R1], 1
JMP .end
.negativo:
	MOV [R1], 0
.end:
	POP A
	RET

somma_primi_N_numeri.asm

; somma dei numeri da 1 a 5 (risultato in s)
JMP start
R0: DB 5

s: DB 0


start:
	CALL sum
	HLT

sum:
	PUSH A
	PUSH B
	PUSH C
	MOV A, [R0]
	MOV B, 0
	MOV C,1
.loop:
	
	CMP A, C
	JB .end
	ADD B, C
	INC C 
	JMP .loop

.end:
	MOV [s], B
	POP C
	POP B
	POP A
	RET