diff options
| author | yenatch <yenatch@gmail.com> | 2013-08-27 23:38:05 -0400 |
|---|---|---|
| committer | yenatch <yenatch@gmail.com> | 2013-08-27 23:38:05 -0400 |
| commit | 8898f63fc788d1d0e9cb3efab7f833fcba07fe07 (patch) | |
| tree | b38a6b4068d555f6a1ba64bbc11d4430bec6706a | |
| parent | e48899c1f4e59db41b5647f03c6651d39d7dd44d (diff) | |
timer interrupt
| -rw-r--r-- | main.asm | 23 |
1 files changed, 16 insertions, 7 deletions
@@ -41,7 +41,7 @@ SECTION "lcd",ROM0[$48] ; lcd interrupt jp LCD SECTION "timer",ROM0[$50] ; timer interrupt - jp Function3e93 + jp Timer SECTION "serial",ROM0[$58] ; serial interrupt jp Function6ef @@ -328,7 +328,7 @@ AskTimer: ; 591 ld a, [$ffe9] and a jr z, .asm_59a - call Function3e93 + call Timer .asm_59a pop af @@ -10975,28 +10975,36 @@ Function3e80: ; 3e80 ; 3e93 -Function3e93: ; 3e93 +Timer: ; 3e93 push af push bc push de push hl + ld a, [$ffe9] and a jr z, .asm_3ed2 + xor a ld [rTAC], a + +; Turn off timer interrupt ld a, [rIF] - and $1b + and 1 << VBLANK | 1 << LCD_STAT | 1 << SERIAL | 1 << JOYPAD ld [rIF], a + ld a, [$c86a] or a jr z, .asm_3ed2 + ld a, [$c822] bit 1, a jr nz, .asm_3eca + ld a, [rSC] - and $80 + and 1 << rSC_ON jr nz, .asm_3eca + ld a, [hROMBank] push af ld a, $44 @@ -11004,16 +11012,17 @@ Function3e93: ; 3e93 rst Bankswitch call $58de + pop bc ld a, b ld [$c981], a rst Bankswitch - .asm_3eca ld a, [rTMA] ld [rTIMA], a - ld a, $6 + + ld a, 1 << rTAC_ON | rTAC_65536_HZ ld [rTAC], a .asm_3ed2 |