diff options
Diffstat (limited to 'home/copy2.asm')
| -rw-r--r-- | home/copy2.asm | 146 |
1 files changed, 75 insertions, 71 deletions
diff --git a/home/copy2.asm b/home/copy2.asm index 830440b0..bd1c0f78 100644 --- a/home/copy2.asm +++ b/home/copy2.asm @@ -1,65 +1,39 @@ -FarCopyData2:: -; Identical to FarCopyData, but uses hROMBankTemp -; as temp space instead of wBuffer. - ld [hROMBankTemp],a - ld a,[H_LOADEDROMBANK] - push af - ld a,[hROMBankTemp] - ld [H_LOADEDROMBANK],a - ld [MBC1RomBank],a - call CopyData - pop af - ld [H_LOADEDROMBANK],a - ld [MBC1RomBank],a - ret - -FarCopyData3:: -; Copy bc bytes from a:de to hl. - ld [hROMBankTemp],a - ld a,[H_LOADEDROMBANK] - push af - ld a,[hROMBankTemp] - ld [H_LOADEDROMBANK],a - ld [MBC1RomBank],a - push hl - push de - push de - ld d,h - ld e,l - pop hl - call CopyData - pop de - pop hl - pop af - ld [H_LOADEDROMBANK],a - ld [MBC1RomBank],a - ret - -FarCopyDataDouble:: +FarCopyDataDouble:: ; 15d4 (0:15d4) ; Expand bc bytes of 1bpp image data -; from a:hl to 2bpp data at de. - ld [hROMBankTemp],a +; from a:de to 2bpp data at hl. + ld [wd122+1],a ld a,[H_LOADEDROMBANK] push af - ld a,[hROMBankTemp] - ld [H_LOADEDROMBANK],a - ld [MBC1RomBank],a -.loop - ld a,[hli] - ld [de],a - inc de - ld [de],a - inc de - dec bc + ld a,[wd122+1] + call BankswitchCommon + ld a,h ; swap hl and de + ld h,d + ld d,a + ld a,l + ld l,e + ld e,a + ld a,b + and a + jr z,.eightbitcopyamount ld a,c - or b - jr nz,.loop + and a ; multiple of $100 + jr z, .expandloop ; if so, do not increment b because the first instance of dec c results in underflow +.eightbitcopyamount + inc b +.expandloop + ld a,[de] + inc de + ld [hli],a + ld [hli],a + dec c + jr nz, .expandloop + dec b + jr nz, .expandloop pop af - ld [H_LOADEDROMBANK],a - ld [MBC1RomBank],a + call BankswitchCommon ret -CopyVideoData:: +CopyVideoData:: ; 15fe (0:15fe) ; Wait for the next VBlank, then copy c 2bpp ; tiles from b:de to hl, 8 tiles at a time. ; This takes c/8 frames. @@ -70,11 +44,10 @@ CopyVideoData:: ld [H_AUTOBGTRANSFERENABLED], a ld a, [H_LOADEDROMBANK] - ld [hROMBankTemp], a + push af ld a, b - ld [H_LOADEDROMBANK], a - ld [MBC1RomBank], a + call BankswitchCommon ld a, e ld [H_VBCOPYSRC], a @@ -94,9 +67,8 @@ CopyVideoData:: .done ld [H_VBCOPYSIZE], a call DelayFrame - ld a, [hROMBankTemp] - ld [H_LOADEDROMBANK], a - ld [MBC1RomBank], a + pop af + call BankswitchCommon pop af ld [H_AUTOBGTRANSFERENABLED], a ret @@ -110,7 +82,7 @@ CopyVideoData:: ld c, a jr .loop -CopyVideoDataDouble:: +CopyVideoDataDouble:: ; 1636 (0:1636) ; Wait for the next VBlank, then copy c 1bpp ; tiles from b:de to hl, 8 tiles at a time. ; This takes c/8 frames. @@ -119,11 +91,10 @@ CopyVideoDataDouble:: xor a ; disable auto-transfer while copying ld [H_AUTOBGTRANSFERENABLED], a ld a, [H_LOADEDROMBANK] - ld [hROMBankTemp], a + push af ld a, b - ld [H_LOADEDROMBANK], a - ld [MBC1RomBank], a + call BankswitchCommon ld a, e ld [H_VBCOPYDOUBLESRC], a @@ -143,9 +114,8 @@ CopyVideoDataDouble:: .done ld [H_VBCOPYDOUBLESIZE], a call DelayFrame - ld a, [hROMBankTemp] - ld [H_LOADEDROMBANK], a - ld [MBC1RomBank], a + pop af + call BankswitchCommon pop af ld [H_AUTOBGTRANSFERENABLED], a ret @@ -159,7 +129,41 @@ CopyVideoDataDouble:: ld c, a jr .loop -ClearScreenArea:: +FillMemory:: ; 166e (0:166e) + push af + ld a,b + and a + jr z, .eightbitcopyamount + ld a,c + and a + jr z, .mulitpleof0x100 +.eightbitcopyamount + inc b +.mulitpleof0x100 + pop af +.loop + ld [hli],a + dec c + jr nz, .loop + dec b + jr nz, .loop + ret + +Func_1681:: ; 1681 (0:1681) + push bc + ld b,a + ld a, [H_LOADEDROMBANK] + push af + ld a,b + call BankswitchCommon + ld b,[hl] + pop af + call BankswitchCommon + ld a,b + pop bc + ret + +ClearScreenArea:: ; 1692 (0:1692) ; Clear tilemap area cxb at hl. ld a, " " ; blank tile ld de, 20 ; screen width @@ -177,7 +181,7 @@ ClearScreenArea:: jr nz, .y ret -CopyScreenTileBufferToVRAM:: +CopyScreenTileBufferToVRAM:: ; 16a4 (0:16a4) ; Copy wTileMap to the BG Map starting at b * $100. ; This is done in thirds of 6 rows, so it takes 3 frames. @@ -212,7 +216,7 @@ CopyScreenTileBufferToVRAM:: ld [H_VBCOPYBGSRC], a ret -ClearScreen:: +ClearScreen:: ; 16dd (0:16dd) ; Clear wTileMap, then wait ; for the bg map to update. ld bc, 20 * 18 |