74 lines
2.1 KiB
C
74 lines
2.1 KiB
C
/*
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Custom GBA BIOS replacement
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Copyright (c) 2002-2006 VBA Development Team
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Copyright (c) 2006-2013 VBA-M Development Team
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Copyright (c) 2013 Normmatt
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include <tonc.h>
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#include "logo_data.h"
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static inline void CPUWriteHalfWord(u32 adr, u16 val)
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{
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*(u16*)adr = val;
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}
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static inline u16 CPUReadHalfWord(u32 adr)
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{
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return *(u16*)adr;
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}
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void memcpy_(u32 source, u32 dest, int count)
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{
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// copy
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while(count) {
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CPUWriteHalfWord(dest, (source>0x0EFFFFFF ? 0x1CAD : CPUReadHalfWord(source)));
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dest += 2;
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source += 2;
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count--;
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}
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}
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extern void swi_LZ77UnCompVram_(u32 source, u32 dest, int checkBios);
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extern void swi_RegisterRamReset(u32 flags);
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/*-----------------------------------------------------------------
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DrawLogo
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Draws a custom logo and pauses for a second or two.
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-----------------------------------------------------------------*/
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void DrawLogo() {
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// Load palette
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memcpy_((u32)logo_dataPal, (u32)pal_bg_mem, logo_dataPalLen);
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// Load tiles into CBB 0
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swi_LZ77UnCompVram_((u32)logo_dataTiles, (u32)&tile_mem[0][0], 0);
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// Load map into SBB 30
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swi_LZ77UnCompVram_((u32)logo_dataMap, (u32)&se_mem[30][0], 0);
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// set up BG0 for a 4bpp 64x32t map, using
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// using charblock 0 and screenblock 31
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REG_BG0CNT= BG_CBB(0) | BG_SBB(30) | BG_4BPP | BG_REG_32x32;
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REG_DISPCNT= DCNT_MODE0 | DCNT_BG0;
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int countdown = 60*2;
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while(countdown--)
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{
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vid_vsync();
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}
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swi_RegisterRamReset(0xFF);
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}
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