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snes_ppu: let's initialize more class variables! nw.

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This commit is contained in:
etabeta78 2014-10-29 07:14:38 +01:00
parent ca67460d24
commit 4cc4bf11be
2 changed files with 105 additions and 42 deletions
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145
src/emu/video/snes_ppu.c
View File

@ -214,51 +214,10 @@ void snes_ppu_device::device_start()
{
m_openbus_cb.resolve_safe(0);
#if SNES_LAYER_DEBUG
memset(&m_debug_options, 0, sizeof(m_debug_options));
#endif
m_vram = auto_alloc_array(machine(), UINT8, SNES_VRAM_SIZE);
m_cgram = auto_alloc_array(machine(), UINT16, SNES_CGRAM_SIZE/2);
m_oam_ram = auto_alloc_array(machine(), UINT16, SNES_OAM_SIZE/2);
/* Inititialize registers/variables */
m_update_windows = 1;
m_beam.latch_vert = 0;
m_beam.latch_horz = 0;
m_beam.current_vert = 0;
m_beam.current_horz = 0;
m_beam.last_visible_line = 225; /* TODO: PAL setting */
m_mode = 0;
m_ppu1_version = 1; // 5C77 chip version number, read by STAT77, only '1' is known
m_ppu2_version = 3; // 5C78 chip version number, read by STAT78, only '2' & '3' encountered so far.
m_cgram_address = 0;
m_read_ophct = 0;
m_read_opvct = 0;
PPU_REG(VMAIN) = 0x80;
// what about other regs?
/* Inititialize mosaic table */
for (int j = 0; j < 16; j++)
{
for (int i = 0; i < 4096; i++)
m_mosaic_table[j][i] = (i / (j + 1)) * (j + 1);
}
/* Init VRAM */
memset(m_vram, 0, SNES_VRAM_SIZE);
/* Init Palette RAM */
memset((UINT8 *)m_cgram, 0, SNES_CGRAM_SIZE);
/* Init oam RAM */
memset((UINT8 *)m_oam_ram, 0xff, SNES_OAM_SIZE);
m_stat78 = 0;
memset(m_regs, 0x00, sizeof(m_regs));
for (int i = 0; i < 2; i++)
{
save_item(NAME(m_scanlines[i].enable), i);
@ -400,7 +359,111 @@ void snes_ppu_device::device_start()
save_pointer(NAME(m_oam_ram), SNES_OAM_SIZE/2);
}
void snes_ppu_device::device_reset()
{
#if SNES_LAYER_DEBUG
memset(&m_debug_options, 0, sizeof(m_debug_options));
#endif
/* Inititialize registers/variables */
m_update_windows = 1;
m_beam.latch_vert = 0;
m_beam.latch_horz = 0;
m_beam.current_vert = 0;
m_beam.current_horz = 0;
m_beam.last_visible_line = 225; /* TODO: PAL setting */
m_mode = 0;
m_ppu1_version = 1; // 5C77 chip version number, read by STAT77, only '1' is known
m_ppu2_version = 3; // 5C78 chip version number, read by STAT78, only '2' & '3' encountered so far.
m_cgram_address = 0;
m_read_ophct = 0;
m_read_opvct = 0;
PPU_REG(VMAIN) = 0x80;
// what about other regs?
/* Inititialize mosaic table */
for (int j = 0; j < 16; j++)
{
for (int i = 0; i < 4096; i++)
m_mosaic_table[j][i] = (i / (j + 1)) * (j + 1);
}
/* Init VRAM */
memset(m_vram, 0, SNES_VRAM_SIZE);
/* Init Palette RAM */
memset((UINT8 *)m_cgram, 0, SNES_CGRAM_SIZE);
/* Init oam RAM */
memset((UINT8 *)m_oam_ram, 0xff, SNES_OAM_SIZE);
m_stat78 = 0;
// other initializations to 0
memset(m_regs, 0, sizeof(m_regs));
memset(m_oam_itemlist, 0, sizeof(m_oam_itemlist));
memset(&m_oam, 0, sizeof(m_oam));
memset(&m_mode7, 0, sizeof(m_mode7));
for (int i = 0; i < 2; i++)
{
m_scanlines[i].enable = 0;
m_scanlines[i].clip = 0;
memset(m_scanlines[i].buffer, 0, SNES_SCR_WIDTH);
memset(m_scanlines[i].priority, 0, SNES_SCR_WIDTH);
memset(m_scanlines[i].layer, 0, SNES_SCR_WIDTH);
memset(m_scanlines[i].blend_exception, 0, SNES_SCR_WIDTH);
}
for (int i = 0; i < 6; i++)
{
m_layer[i].window1_enabled = 0;
m_layer[i].window1_invert = 0;
m_layer[i].window2_enabled = 0;
m_layer[i].window2_invert = 0;
m_layer[i].wlog_mask = 0;
m_layer[i].color_math = 0;
m_layer[i].charmap = 0;
m_layer[i].tilemap = 0;
m_layer[i].tilemap_size = 0;
m_layer[i].tile_size = 0;
m_layer[i].mosaic_enabled = 0;
m_layer[i].main_window_enabled = 0;
m_layer[i].sub_window_enabled = 0;
m_layer[i].main_bg_enabled = 0;
m_layer[i].sub_bg_enabled = 0;
m_layer[i].hoffs = 0;
m_layer[i].voffs = 0;
memset(m_clipmasks[i], 0, SNES_SCR_WIDTH);
}
for (int i = 0; i < ARRAY_LENGTH(m_oam_spritelist); i++)
{
m_oam_spritelist[i].tile = 0;
m_oam_spritelist[i].x = 0;
m_oam_spritelist[i].y = 0;
m_oam_spritelist[i].size = 0;
m_oam_spritelist[i].vflip = 0;
m_oam_spritelist[i].hflip = 0;
m_oam_spritelist[i].priority_bits = 0;
m_oam_spritelist[i].pal = 0;
m_oam_spritelist[i].height = 0;
m_oam_spritelist[i].width = 0;
}
for (int i = 0; i < ARRAY_LENGTH(m_oam_tilelist); i++)
{
m_oam_tilelist[i].x = 0;
m_oam_tilelist[i].priority = 0;
m_oam_tilelist[i].pal = 0;
m_oam_tilelist[i].tileaddr = 0;
m_oam_tilelist[i].hflip = 0;
}
}
/*****************************************
* get_bgcolor()

2
src/emu/video/snes_ppu.h
View File

@ -271,7 +271,7 @@ public:
protected:
// device-level overrides
virtual void device_start();
virtual void device_reset() {};
virtual void device_reset();
private:
devcb_read16 m_openbus_cb;