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spc1500: screen update modified for game (galaxy)

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Palet table added for simple screen update (from a comment of the naver cafe manager 'Loderunner') .
Video start addr of MC6845 regs affected on screen update (galaxy).
PCG character takes proper palet color (galaxy).
Joystick port active has been fixed to low from high.
This commit is contained in:
Miso Kim 2016-01-10 10:02:22 +09:00
parent 6c18ce2c95
commit 5a22684fd4
1 changed files with 36 additions and 27 deletions
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63
src/mame/drivers/spc1500.cpp
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@ -284,6 +284,7 @@ private:
UINT8 *m_p_ram;
UINT8 m_ipl;
UINT8 m_palet[3];
UINT8 m_paltbl[8];
UINT16 m_page;
UINT16 m_pcg_addr;
UINT8 m_pcg_char, m_pcg_attr;
@ -367,6 +368,8 @@ WRITE8_MEMBER( spc1500_state::portc_w)
m_centronics->write_strobe(BIT(data, 7));
m_double_mode = (!m_p5bit && BIT(data, 5)); // double access I/O mode
m_p5bit = BIT(data, 5);
m_vdg->set_clock(VDP_CLOCK/(BIT(data, 2) ? 48 : 24));
}
READ8_MEMBER( spc1500_state::portb_r)
@ -453,7 +456,8 @@ WRITE8_MEMBER( spc1500_state::priority_w)
WRITE8_MEMBER( spc1500_state::palet_w)
{
m_palet[(offset>>8)&0x0f] = data;
// printf("palet:0x%02x, 0x%02x, 0x%02x\n", m_palet[0], m_palet[1], m_palet[2]);
for(int i=1, j=0; i < 0x100; i<<=1, j++)
m_paltbl[j] = (m_palet[0]&i?1:0)|(m_palet[1]&i?2:0)|(m_palet[2]&i?4:0);
}
PALETTE_INIT_MEMBER(spc1500_state,spc)
@ -495,23 +499,22 @@ MC6845_UPDATE_ROW(spc1500_state::crtc_update_row)
char hs = (m_crtc_vreg[0x9] < 15 ? 3 : 4);
int n = y & (m_crtc_vreg[0x9]);
bool ln400 = (hs == 4 && m_crtc_vreg[0x4] > 20);
UINT8 *vram = &m_p_videoram[0] + (m_crtc_vreg[12] << 8) + m_crtc_vreg[13];
for (i = 0; i < x_count; i++)
{
UINT8 *pp = &m_p_videoram[0x2000+((y>>hs)*x_count+(((y)&7)<<11))+i+(((hs==4)&&(y&8))?0x400:0)];
UINT8 *pv = &m_p_videoram[(y>>hs)*x_count + i];
UINT8 *pp = &vram[0x2000+((y>>hs)*x_count+(((y)&7)<<11))+i+(((hs==4)&&(y&8))?0x400:0)];
UINT8 *pv = &vram[(y>>hs)*x_count + i];
UINT8 ascii = *(pv+0x1000);
UINT8 attr = *pv;
inv = (attr & 0x8 ? true : false);
UINT8 rgb = (attr & 0x7);
UINT8 pal = 1<<rgb;
UINT8 color = attr & 0x7;
UINT8 pixelb = *(pp+0);
UINT8 pixelr = *(pp+0x4000);
UINT8 pixelg = *(pp+0x8000);
UINT8 pen = (((m_palet[0]&pal)>0)<<2)|(((m_palet[1]&pal)>0)<<1)|(((m_palet[2]&pal)>0));
if ((m_palet[0] | m_palet[1] | m_palet[2])==0 || ln400)
pen = rgb;
UINT32 color = m_palette->pen(pen);
bool nopalet = ((m_palet[0] | m_palet[1] | m_palet[2])==0 || ln400);
UINT8 pen = (nopalet ? color : m_paltbl[color]);
UINT8 pixelpen = 0;
UINT8 pixel = 0;
if (hs == 4 && ascii & 0x80)
{
UINT16 wpixelb = (pixelb << 8) + (*(pp+1));
@ -529,10 +532,11 @@ MC6845_UPDATE_ROW(spc1500_state::crtc_update_row)
hfnt = hfnt & ((*pf << 8) | (*(pf+16)));
hfnt = (inv ? 0xffff - hfnt : hfnt);
//printf("0x%04x\n" , hfnt);
for (j = 0; j < 16; j++)
for (j = 0x8000; j > 0; j>>=1)
{
pixelpen = (((wpixelg&(0x8000 >> j))>0 ? 4:0 )|((wpixelr&(0x8000 >> j))>0 ? 2:0)|((wpixelb&(0x8000 >> j))>0 ? 1:0));
*p++ = (((hfnt & (0x8000 >> j)) || (m_priority & (1<<pixelpen))) ? m_palette->pen(pixelpen) : color);
pixel = ((wpixelg&j ? 4:0 )|(wpixelr&j? 2:0)|(wpixelb&j ? 1:0));
pixelpen = (nopalet ? pixel : m_paltbl[pixel]);
*p++ = m_palette->pen(((hfnt & j) || (m_priority & (1<<pixel))) ? pixelpen : pen);
}
i++;
}
@ -542,11 +546,13 @@ MC6845_UPDATE_ROW(spc1500_state::crtc_update_row)
UINT8 b = *pa;
UINT8 r = *(pa+0x800);
UINT8 g = *(pa+0x1000);
for (j = 0; j < 8; j++)
for (j = 0x80; j > 0; j>>=1)
{
pen = ((g & (0x80 >> j))>0?4:0)|((r & (0x80>>j))>0?2:0)|((b & (0x80>>j))>0?1:0);
pixelpen = (((pixelg&(0x80 >> j))>0 ? 4 : 0)|((pixelr&(0x80 >> j))>0 ? 2:0)|(((pixelb&(0x80 >> j) ? 1:0 ))));
*p++ = ((pen == 0 || (m_priority & (1<<pixelpen))) ? m_palette->pen(pixelpen) : m_palette->pen(pen));
pixel = ((g & j)?4:0)|((r & j)?2:0)|((b & j)?1:0);
pen = (pixel == 7 ? color : pixel);
pixel = (pixelg&j ? 4 : 0)|(pixelr&j ? 2:0)|(pixelb&j ? 1:0 );
pixelpen = (nopalet ? pixel : m_paltbl[pixel]);
*p++ = m_palette->pen((m_priority & (1<<pixel)) ? pixelpen : pen);
}
}
else
@ -556,16 +562,16 @@ MC6845_UPDATE_ROW(spc1500_state::crtc_update_row)
if (ascii == 0 && (attr & 0x08) && inv)
{
fnt = 0xff;
color = m_palette->pen(7);
}
fnt = (inv ? 0xff - fnt : fnt);
for (j = 0; j < 8; j++)
for (j = 0x80; j > 0; j>>=1)
{
pixelpen = (((pixelg&(0x80 >> j))>0 ? 4 : 0)|((pixelr&(0x80 >> j))>0 ? 2:0)|(((pixelb&(0x80 >> j) ? 1:0 ))));
pixel = ((pixelg&j) ? 4 : 0)|(pixelr&j ? 2:0)|(pixelb&j ? 1:0 );
pixelpen = (nopalet ? pixel : m_paltbl[pixel]);
if (ascii == 0 && attr == 0 && !inv)
*p++ = m_palette->pen(pixelpen);
else
*p++ = (((fnt & (0x80 >> j)) || (m_priority & (1<<pixelpen))) ? m_palette->pen(pixelpen) : color);
*p++ = m_palette->pen(((fnt & j) || (m_priority & (1<<pixel))) ? pixelpen : pen);
}
}
}
@ -782,12 +788,14 @@ static INPUT_PORTS_START( spc1500 )
PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("9 (") PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_CHAR('(')
PORT_START("JOY")
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_JOYSTICK_UP ) PORT_8WAY PORT_PLAYER(1)
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_JOYSTICK_DOWN ) PORT_8WAY PORT_PLAYER(1)
PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_JOYSTICK_LEFT ) PORT_8WAY PORT_PLAYER(1)
PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_JOYSTICK_RIGHT ) PORT_8WAY PORT_PLAYER(1)
PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_BUTTON1 ) PORT_PLAYER(1)
PORT_BIT(0x50, IP_ACTIVE_HIGH, IPT_BUTTON2 ) PORT_PLAYER(1)
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY PORT_PLAYER(1)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY PORT_PLAYER(1)
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY PORT_PLAYER(1)
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY PORT_PLAYER(1)
PORT_BIT(0x10, IP_ACTIVE_HIGH,IPT_UNUSED) // DIP SW2 for Korean/English
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(1)
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_PLAYER(1)
PORT_BIT(0x80, IP_ACTIVE_HIGH,IPT_UNUSED) // DIP SW3 for 200/400 line
INPUT_PORTS_END
static ADDRESS_MAP_START(spc1500_mem, AS_PROGRAM, 8, spc1500_state )
@ -820,6 +828,7 @@ void spc1500_state::machine_reset()
m_motor = false;
m_time = machine().scheduler().time();
m_double_mode = false;
memset(&m_paltbl[0], 1, 8);
}
READ8_MEMBER(spc1500_state::mc6845_videoram_r)
@ -831,6 +840,7 @@ READ8_MEMBER( spc1500_state::psga_r )
{
UINT8 data = 0;
data |= (BIT(m_dipsw->read(),1)<<4) | (BIT(m_dipsw->read(),2)<<7);
data |= (m_io_joy->read() & 0x6f);
return data;
}
@ -839,7 +849,6 @@ READ8_MEMBER( spc1500_state::porta_r )
UINT8 data = 0x3f;
data |= (m_cass->input() > 0.0038) ? 0x80 : 0;
data |= ((m_cass->get_state() & CASSETTE_MASK_UISTATE) != CASSETTE_STOPPED) && ((m_cass->get_state() & CASSETTE_MASK_MOTOR) == CASSETTE_MOTOR_ENABLED) ? 0x00 : 0x40;
data |= (m_io_joy->read() & 0x6f);
data &= ~((m_centronics_busy == 0)<< 5);
return data;
}