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Experimental scanline-based drawing function, and added color attribute.

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This commit is contained in:
Angelo Salese 2015-01-28 21:18:10 +01:00
parent a8f1140de0
commit 26eceda93f
1 changed files with 42 additions and 10 deletions
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52
src/mess/drivers/c65.c
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@ -51,6 +51,9 @@ public:
required_shared_ptr<UINT8> m_cram;
required_device<gfxdecode_device> m_gfxdecode;
UINT8 *m_iplrom;
DECLARE_READ8_MEMBER(vic4567_dummy_r);
DECLARE_WRITE8_MEMBER(vic4567_dummy_w);
DECLARE_WRITE8_MEMBER(PalRed_w);
@ -80,23 +83,49 @@ private:
UINT8 m_VIC3_ControlA,m_VIC3_ControlB;
void PalEntryFlush(UINT8 offset);
void DMAgicExecute(address_space &space,UINT32 address);
int inner_x_char(int xoffs);
int inner_y_char(int yoffs);
};
void c65_state::video_start()
{
}
// TODO: inline?
int c65_state::inner_x_char(int xoffs)
{
return xoffs>>3;
}
int c65_state::inner_y_char(int yoffs)
{
return yoffs>>3;
}
UINT32 c65_state::screen_update( screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect )
{
int y,x;
gfx_element *gfx = m_gfxdecode->gfx(0);
for(y=0;y<25;y++)
// TODO: border area
for(y=0;y<m_screen->height();y++)
{
for(x=0;x<80;x++)
for(x=0;x<m_screen->width();x++)
{
UINT8 tile = m_workram[x+y*80+0x800];
gfx->opaque(bitmap,cliprect,tile,0,0,0,x*8,y*8);
//int, xi,yi,xm,ym,dot_x;
int xi = inner_x_char(x);
int yi = inner_y_char(y);
int xm = 7 - (x & 7);
int ym = (y & 7);
UINT8 tile = m_workram[xi+yi*80+0x800];
UINT8 attr = m_cram[xi+yi*80];
int enable_dot = ((m_iplrom[(tile<<3)+ym+0xd000] >> xm) & 1);
//if(cliprect.contains(x, y))
bitmap.pix16(y, x) = m_palette->pen((enable_dot) ? attr & 0xf : 0);
//gfx->opaque(bitmap,cliprect,tile,0,0,0,x*8,y*8);
}
}
@ -261,7 +290,7 @@ READ8_MEMBER(c65_state::CIASelect_r)
return m_cram[offset];
else
{
// CIA
// CIA at 0xdc00
}
return 0xff;
@ -273,7 +302,7 @@ WRITE8_MEMBER(c65_state::CIASelect_w)
m_cram[offset] = data;
else
{
// CIA
// CIA at 0xdc00
}
}
@ -298,7 +327,7 @@ static ADDRESS_MAP_START( c65_map, AS_PROGRAM, 8, c65_state )
AM_RANGE(0x0d700, 0x0d702) AM_WRITE(DMAgic_w) AM_SHARE("dmalist") // 0x0d700, 0x0d7** DMAgic
//AM_RANGE(0x0d703, 0x0d703) AM_READ(DMAgic_r)
// 0x0d800, 0x0d8** Color matrix
AM_RANGE(0x0dc00, 0x0dfff) AM_READWRITE(CIASelect_r,CIASelect_w) AM_SHARE("cram")
AM_RANGE(0x0d800, 0x0dfff) AM_READWRITE(CIASelect_r,CIASelect_w) AM_SHARE("cram")
// 0x0dc00, 0x0dc** CIA-1
// 0x0dd00, 0x0dd** CIA-2
// 0x0de00, 0x0de** Ext I/O Select 1
@ -370,6 +399,9 @@ INPUT_PORTS_END
void c65_state::machine_start()
{
m_iplrom = memregion("maincpu")->base();
save_pointer(NAME(m_cram.target()), 0x800);
}
void c65_state::machine_reset()
@ -394,7 +426,7 @@ static const gfx_layout charlayout =
};
static GFXDECODE_START( c65 )
GFXDECODE_ENTRY( "maincpu", 0xd000, charlayout, 0, 1 ) // another identical copy is at 0x9000
GFXDECODE_ENTRY( "maincpu", 0xd000, charlayout, 0, 16 ) // another identical copy is at 0x9000
GFXDECODE_END
INTERRUPT_GEN_MEMBER(c65_state::vic3_vblank_irq)