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(MESS) mbc200 : video code improved

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This commit is contained in:
Robbbert 2014-05-20 01:16:17 +00:00
parent 453141c1c8
commit e6ea8bf92f
1 changed files with 25 additions and 35 deletions
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60
src/mess/drivers/mbc200.c
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@ -60,7 +60,7 @@ public:
DECLARE_READ8_MEMBER(from_master_r);
DECLARE_WRITE8_MEMBER(porta_w);
DECLARE_READ8_MEMBER(ppi_hs_r);
UINT32 screen_update_mbc200(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
MC6845_UPDATE_ROW(update_row);
required_device<palette_device> m_palette;
private:
@ -128,7 +128,7 @@ static ADDRESS_MAP_START( mbc200_sub_io , AS_IO, 8, mbc200_state)
ADDRESS_MAP_UNMAP_HIGH
ADDRESS_MAP_GLOBAL_MASK(0xff)
AM_RANGE(0x70, 0x73) AM_DEVREADWRITE("ppi8255_1", i8255_device, read, write)
AM_RANGE(0xb0, 0xb0) AM_DEVWRITE("crtc", mc6845_device, address_w)
AM_RANGE(0xb0, 0xb0) AM_DEVREADWRITE("crtc", mc6845_device, status_r, address_w)
AM_RANGE(0xb1, 0xb1) AM_DEVREADWRITE("crtc", mc6845_device, register_r, register_w)
// AM_RANGE(0xd0, 0xd3) AM_DEVREADWRITE("ppi8255_2", i8255_device, read, write)
AM_RANGE(0xd0, 0xd0) AM_READ(from_master_r)
@ -154,36 +154,6 @@ void mbc200_state::machine_start()
m_floppy1->floppy_drive_set_ready_state(1, 1);
}
UINT32 mbc200_state::screen_update_mbc200(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
int x,y,xi,yi;
int count;
count = 0;
for(y=0;y<100;y++)
{
for(x=0;x<80;x++)
{
for(yi=0;yi<4;yi++)
{
for(xi=0;xi<8;xi++)
{
UINT8 dot;
dot = (m_vram[count] >> (7-xi)) & 1;
if(y*4+yi < 400 && x*8+xi < 640) /* TODO: safety check */
bitmap.pix16(y*4+yi, x*8+xi) = m_palette->pen(dot);
}
count++;
}
}
}
return 0;
}
WRITE8_MEMBER( mbc200_state::porta_w )
{
machine().scheduler().synchronize(); // force resync
@ -210,6 +180,27 @@ static const floppy_interface mbc200_floppy_interface =
// SLOT_INTERFACE( "525dd", FLOPPY_525_SSDD )
//SLOT_INTERFACE_END
MC6845_UPDATE_ROW( mbc200_state::update_row )
{
const rgb_t *palette = m_palette->palette()->entry_list_raw();
UINT8 gfx;
UINT16 mem,x;
UINT32 *p = &bitmap.pix32(y);
for (x = 0; x < x_count; x++)
{
mem = (ma+x)*4+ra;
gfx = m_vram[mem];
*p++ = palette[BIT(gfx, 7)];
*p++ = palette[BIT(gfx, 6)];
*p++ = palette[BIT(gfx, 5)];
*p++ = palette[BIT(gfx, 4)];
*p++ = palette[BIT(gfx, 3)];
*p++ = palette[BIT(gfx, 2)];
*p++ = palette[BIT(gfx, 1)];
*p++ = palette[BIT(gfx, 0)];
}
}
static const gfx_layout mbc200_chars_8x8 =
{
@ -243,15 +234,14 @@ static MACHINE_CONFIG_START( mbc200, mbc200_state )
MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) /* not accurate */
MCFG_SCREEN_SIZE(640, 400)
MCFG_SCREEN_VISIBLE_AREA(0, 640-1, 0, 400-1)
MCFG_SCREEN_UPDATE_DRIVER(mbc200_state, screen_update_mbc200)
MCFG_SCREEN_PALETTE("palette")
MCFG_SCREEN_UPDATE_DEVICE("crtc", h46505_device, screen_update)
MCFG_GFXDECODE_ADD("gfxdecode", "palette", mbc200)
MCFG_PALETTE_ADD_BLACK_AND_WHITE("palette")
MCFG_MC6845_ADD("crtc", H46505, "screen", XTAL_8MHz / 4) // HD46505SP
MCFG_MC6845_SHOW_BORDER_AREA(false)
MCFG_MC6845_CHAR_WIDTH(8)
MCFG_MC6845_UPDATE_ROW_CB(mbc200_state, update_row)
MCFG_DEVICE_ADD("ppi8255_1", I8255, 0)