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b16.cpp: device_finder (nw)

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This commit is contained in:
Ivan Vangelista 2018-05-31 11:18:14 +02:00
parent 44243dcac8
commit ee20deea84
1 changed files with 29 additions and 38 deletions
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67
src/mame/drivers/b16.cpp
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@ -27,14 +27,28 @@ public:
b16_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag),
m_vram(*this, "vram"),
m_mc6845(*this, "crtc"),
m_dma8237(*this, "8237dma"),
m_maincpu(*this, "maincpu"),
m_gfxdecode(*this, "gfxdecode"),
m_palette(*this, "palette") { }
m_palette(*this, "palette"),
m_char_rom(*this, "pcg") { }
void b16(machine_config &config);
protected:
virtual void video_start() override;
private:
uint8_t m_crtc_vreg[0x100], m_crtc_index;
uint8_t *m_char_rom;
required_shared_ptr<uint16_t> m_vram;
uint8_t m_crtc_vreg[0x100],m_crtc_index;
required_device<mc6845_device> m_mc6845;
required_device<am9517a_device> m_dma8237;
required_device<cpu_device> m_maincpu;
required_device<gfxdecode_device> m_gfxdecode;
required_device<palette_device> m_palette;
required_region_ptr<uint8_t> m_char_rom;
DECLARE_READ16_MEMBER(vblank_r);
DECLARE_WRITE8_MEMBER(b16_pcg_w);
@ -45,17 +59,8 @@ public:
DECLARE_READ8_MEMBER(memory_read_byte);
DECLARE_WRITE8_MEMBER(memory_write_byte);
virtual void video_start() override;
uint32_t screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
mc6845_device *m_mc6845;
required_device<am9517a_device> m_dma8237;
virtual void machine_start() override;
virtual void machine_reset() override;
required_device<cpu_device> m_maincpu;
required_device<gfxdecode_device> m_gfxdecode;
required_device<palette_device> m_palette;
void b16(machine_config &config);
void b16_io(address_map &map);
void b16_map(address_map &map);
};
@ -80,30 +85,26 @@ public:
void b16_state::video_start()
{
// find memory regions
m_char_rom = memregion("pcg")->base();
save_item(NAME(m_crtc_vreg));
save_item(NAME(m_crtc_index));
}
uint32_t b16_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
int x,y;
int xi,yi;
uint8_t *gfx_rom = memregion("pcg")->base();
for(y=0;y<mc6845_v_display;y++)
for(int y=0;y<mc6845_v_display;y++)
{
for(x=0;x<mc6845_h_display;x++)
for(int x=0;x<mc6845_h_display;x++)
{
int tile = m_vram[x+y*mc6845_h_display] & 0xff;
int color = (m_vram[x+y*mc6845_h_display] & 0x700) >> 8;
int pen;
for(yi=0;yi<mc6845_tile_height;yi++)
for(int yi=0;yi<mc6845_tile_height;yi++)
{
for(xi=0;xi<8;xi++)
for(int xi=0;xi<8;xi++)
{
pen = (gfx_rom[tile*16+yi] >> (7-xi) & 1) ? color : 0;
pen = (m_char_rom[tile*16+yi] >> (7-xi) & 1) ? color : 0;
if(y*mc6845_tile_height < 400 && x*8+xi < 640) /* TODO: safety check */
bitmap.pix16(y*mc6845_tile_height+yi, x*8+xi) = m_palette->pen(pen);
@ -251,16 +252,6 @@ static GFXDECODE_START( gfx_b16 )
GFXDECODE_ENTRY( "pcg", 0x0000, b16_charlayout, 0, 1 )
GFXDECODE_END
void b16_state::machine_start()
{
m_mc6845 = machine().device<mc6845_device>("crtc");
}
void b16_state::machine_reset()
{
}
READ8_MEMBER(b16_state::memory_read_byte)
{
address_space& prog_space = m_maincpu->space(AS_PROGRAM);
@ -276,7 +267,7 @@ WRITE8_MEMBER(b16_state::memory_write_byte)
MACHINE_CONFIG_START(b16_state::b16)
/* basic machine hardware */
MCFG_DEVICE_ADD("maincpu",I8086, XTAL(14'318'181)/2) //unknown xtal
MCFG_DEVICE_ADD(m_maincpu, I8086, XTAL(14'318'181)/2) //unknown xtal
MCFG_DEVICE_PROGRAM_MAP(b16_map)
MCFG_DEVICE_IO_MAP(b16_io)
@ -290,16 +281,16 @@ MACHINE_CONFIG_START(b16_state::b16)
MCFG_SCREEN_VISIBLE_AREA(0, 640-1, 0, 400-1)
MCFG_SCREEN_PALETTE("palette")
MCFG_MC6845_ADD("crtc", H46505, "screen", XTAL(14'318'181)/5) /* unknown clock, hand tuned to get ~60 fps */
MCFG_MC6845_ADD(m_mc6845, H46505, "screen", XTAL(14'318'181)/5) /* unknown clock, hand tuned to get ~60 fps */
MCFG_MC6845_SHOW_BORDER_AREA(false)
MCFG_MC6845_CHAR_WIDTH(8)
MCFG_DEVICE_ADD("8237dma", AM9517A, XTAL(14'318'181)/2)
MCFG_DEVICE_ADD(m_dma8237, AM9517A, XTAL(14'318'181)/2)
MCFG_I8237_IN_MEMR_CB(READ8(*this, b16_state, memory_read_byte))
MCFG_I8237_OUT_MEMW_CB(WRITE8(*this, b16_state, memory_write_byte))
MCFG_DEVICE_ADD("gfxdecode", GFXDECODE, "palette", gfx_b16)
MCFG_PALETTE_ADD("palette", 8)
MCFG_DEVICE_ADD(m_gfxdecode, GFXDECODE, m_palette, gfx_b16)
MCFG_PALETTE_ADD(m_palette, 8)
// MCFG_PALETTE_INIT_STANDARD(black_and_white) // TODO
MACHINE_CONFIG_END