diff options
Diffstat (limited to 'home/vcopy.asm')
| -rw-r--r-- | home/vcopy.asm | 27 |
1 files changed, 14 insertions, 13 deletions
diff --git a/home/vcopy.asm b/home/vcopy.asm index bfcaa7c..a453da5 100644 --- a/home/vcopy.asm +++ b/home/vcopy.asm @@ -3,6 +3,7 @@ INCLUDE "vram.asm" SECTION "Copy Routines used by VBlank ISR", ROM0[$123a] +RedrawRowOrColumn:: ; 123a (0:123a) ; This function redraws a BG row of height 2 or a BG column of width 2. ; One of its main uses is redrawing the row or column that will be exposed upon ; scrolling the BG when the player takes a step. Redrawing only the exposed @@ -11,7 +12,6 @@ SECTION "Copy Routines used by VBlank ISR", ROM0[$123a] ; when necessary. It is also used in trade animation and elevator code. ; This also implements the flashlight drawing distance effect, which takes ; multiple frames in either direction to complete -RedrawRowOrColumn:: ; 123a (0:123a) ldh a, [hRedrawRowOrColumnMode] and a ret z @@ -63,8 +63,8 @@ RedrawRowOrColumn:: ; 123a (0:123a) ld a, BG_MAP_WIDTH ; width of VRAM background map add e ld e, a - ; fall through and draw lower half - + ; fallthrough (draw lower half) + .DrawHalf ld c, SCREEN_WIDTH / 2 .row_loop @@ -98,6 +98,7 @@ RedrawRowOrColumn:: ; 123a (0:123a) ld h, [hl] ld l, a jp hl + .flashlight_effect_table dw RedrawFlashlightRow0 ; $1310 dw RedrawFlashlightRow0 ; $1310 @@ -115,7 +116,7 @@ RedrawRowOrColumn:: ; 123a (0:123a) dw RedrawFlashlightRow3 ; $134E dw RedrawFlashlightColumn3 ; $1301 dw RedrawFlashlightColumn3 ; $1301 - + RedrawFlashlightColumn0:: ; 12c3 (0:12c3) ldh a, [hSCX] and $07 @@ -384,8 +385,8 @@ AutoBgMapTransfer:: ; 13ee (0:13ee) .doTransfer ldh [hBGMapTransferPosition], a ld a, $06 ; 6 rows of SCREEN_WIDTH each - ; fall through - + ; fallthrough + TransferBgRows:: ; 1430 (0:1430) ld bc, BG_MAP_WIDTH - SCREEN_WIDTH + 1 .loop @@ -397,7 +398,7 @@ TransferBgRows:: ; 1430 (0:1430) ld [hl], d inc l endr - + pop de ld [hl], e inc l @@ -412,6 +413,7 @@ TransferBgRows:: ; 1430 (0:1430) ld sp, hl ret +VBlankCopyDouble:: ; 1470 (0:1470) ; Copy [wVBCopyDoubleSize] 1bpp tiles ; from wVBCopyDoubleSrc to wVBCopyDoubleDst. ; wVBCopyDoubleDst must be aligned to 0x10 bytes. @@ -419,7 +421,6 @@ TransferBgRows:: ; 1430 (0:1430) ; While we're here, convert to 2bpp. ; The process is straightforward: ; copy each byte twice. -VBlankCopyDouble:: ; 1470 (0:1470) ld a, [wVBCopyDoubleSize] and a ret z @@ -439,7 +440,7 @@ VBlankCopyDouble:: ; 1470 (0:1470) ld [wVBCopyDoubleSize], a .loop - rept 16/4 - 1 ; 16 bytes per 2bpp tile at 2 bytes per pop + rept 16/4 - 1 ; 16 bytes per 2bpp tile at 2 bytes per pop pop de ; copied twice minus last block ld [hl], e inc l @@ -450,7 +451,7 @@ VBlankCopyDouble:: ; 1470 (0:1470) ld [hl], d inc l endr - + pop de ld [hl], e inc l @@ -474,13 +475,13 @@ VBlankCopyDouble:: ; 1470 (0:1470) ld sp, hl ret +VBlankCopy:: ; 14c7 (0:14c7) ; Copy 16 * [wVBCopySize] bytes ; from wVBCopySrc to wVBCopyDst. ; wVBCopyDst must be aligned to 0x10 bytes. ; Source and destination addresses are updated, ; so transfer can continue in subsequent calls. -VBlankCopy:: ; 14c7 (0:14c7) ld a, [wVBCopySize] and a ret z @@ -561,13 +562,13 @@ Function_1538: ; 1538 (0:1538) ld a, $01 jp TransferBgRows +VBlankCopyFar:: ; 1558 (0:1558) ; Copy 0x10 * [wVBCopyFarSize] bytes ; from wVBCopyFarSrcBank::wVBCopyFarSrc to wVBCopyFarDst. ; wVBCopyFarDst must be aligned to 0x10 bytes. ; Source and destination addresses are updated, ; so transfer can continue in subsequent calls. -VBlankCopyFar:: ; 1558 (0:1558) ld a, [wVBCopyFarSize] and a ret z @@ -595,7 +596,7 @@ VBlankCopyFar:: ; 1558 (0:1558) ld [hl], d inc l endr - + pop de ld [hl], e inc l |