diff options
Diffstat (limited to 'src/home/division.asm')
| -rw-r--r-- | src/home/division.asm | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/src/home/division.asm b/src/home/division.asm new file mode 100644 index 0000000..56bc651 --- /dev/null +++ b/src/home/division.asm @@ -0,0 +1,31 @@ +; divides BC by DE. Stores result in BC and stores remainder in HL +DivideBCbyDE: + ld hl, $0000 + rl c + rl b + ld a, $10 +.asm_3c63 + ldh [hffb6], a + rl l + rl h + push hl + ld a, l + sub e + ld l, a + ld a, h + sbc d + ccf + jr nc, .asm_3c78 + ld h, a + add sp, $2 + scf + jr .asm_3c79 +.asm_3c78 + pop hl +.asm_3c79 + rl c + rl b + ldh a, [hffb6] + dec a + jr nz, .asm_3c63 + ret |