pad8.c

void pad_numbers8(uint8_t *s, uint8_t limit, uint8_t number)
{
	/*
	 s += limit;
	 *s = 0;

	 do
	 {
	 limit--;

	 *--s = (number % 10) + '0';
	 number /= 10;
	 } while (limit);
	 */

	__asm
		ld hl, #4
		add hl, sp
		ld b, #0
		ld c, (hl)
		dec hl
		ld d, (hl)
		dec hl
		ld e, (hl)

		ld hl, #5
		add hl, sp
		ld a, (hl) ; number

		ex de, hl
		add hl, bc ; s+ = limit
		ld (hl), #0

		ld b, c ; limit
		ld c, a ; number

		pad_numbers8_loop:
		dec hl

		; mod
		ld a, c
		ld de, #0x05a0
		mod_loop:
		sub e
		jr nc, skip_mod_add
		add a, e
		skip_mod_add:
		srl e
		dec d
		jr nz, mod_loop

		add a, #0x30 ; (number mod 10) + '0'
		ld (hl), a ; store in *s

		push hl
		ld d, #0
		ld e, c
		ld h, d
		ld l, e
		add hl, hl
		add hl, de
		add hl, hl
		add hl, hl
		add hl, de
		add hl, hl
		ld c, h ; number /= 10
		pop hl

		djnz pad_numbers8_loop
		__endasm;

}