diff options
| -rw-r--r-- | src/example/gb.asm | 43 |
1 files changed, 31 insertions, 12 deletions
diff --git a/src/example/gb.asm b/src/example/gb.asm index 473ac89..ddefadb 100644 --- a/src/example/gb.asm +++ b/src/example/gb.asm @@ -11,18 +11,22 @@ SCRN equ $9800 OAM equ $fe00 LCDC equ $ff40 STAT equ $ff41 +BGRDPAL equ $ff47 +OBJ0PAL equ $ff48 +OBJ1PAL equ $ff49 +CURLINE equ $ff44 READY equ $ff81 XPOS equ $ff82 VBLANK macro - push af -.wait - ldh a,(LCDC) - cp $91 - jr nz,wait - - pop af +; push af +;.wait +; ldh a,(CURLINE) +; cp 144 +; jr nz,wait +; +; pop af endm @@ -41,10 +45,16 @@ VBLANK macro ; Set LCD so only sprites show ; - ld a,$82 + VBLANK + + ld a,$81 ldh (LCDC),a ld a,$10 ldh (STAT),a + ld a,$e4 + ldh (BGRDPAL),a + ldh (OBJ0PAL),a + ldh (OBJ1PAL),a ; Copy to VRAM ; @@ -55,8 +65,8 @@ VBLANK macro VBLANK .copy - ld a,(hl+) - ld (de),a + ld a,(de) + ld (hl+),a inc de dec a jr nz,copy @@ -65,20 +75,22 @@ VBLANK macro ldh (READY),a .idle + ei halt nop jr idle vbl_code: ldh a,(READY) + or a jr z,finish ldh a,(XPOS) inc a ldh (XPOS),a + ld (OAM),a ld (OAM+1),a xor a - ld (OAM),a ld (OAM+2),a ld (OAM+3),a @@ -86,5 +98,12 @@ vbl_code: reti sprite: - defs 16,$ff + defb $ff,00 + defb $ff,00 + defb $ff,00 + defb $ff,00 + defb $ff,00 + defb $ff,00 + defb $ff,00 + defb $ff,00 |