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decodmd2: Updated to use MC6845_UPDATE_ROW, and corrected status return. (no whatsnew)

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mahlemiut 2013-06-27 06:42:24 +00:00
parent 665bf49d7a
commit cea5a8578f
2 changed files with 29 additions and 27 deletions
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55
src/mame/video/decodmd2.c
View File

@ -51,7 +51,7 @@ READ8_MEMBER( decodmd_type2_device::busy_r )
{
UINT8 ret = 0x00;
ret = (m_status & 0x03) << 3;
ret = (m_status & 0x0f) << 3;
if(m_busy)
return 0x80 | ret;
@ -77,6 +77,11 @@ WRITE8_MEMBER( decodmd_type2_device::ctrl_w )
m_ctrl = data;
}
READ8_MEMBER( decodmd_type2_device::ctrl_r )
{
return m_ctrl;
}
READ8_MEMBER( decodmd_type2_device::status_r )
{
return m_status;
@ -92,13 +97,31 @@ TIMER_DEVICE_CALLBACK_MEMBER(decodmd_type2_device::dmd_firq)
m_cpu->set_input_line(M6809_FIRQ_LINE, HOLD_LINE);
}
MC6845_UPDATE_ROW( dmd_update_row )
{
decodmd_type2_device *state = downcast<decodmd_type2_device *>(device->owner());
UINT8* RAM = state->m_ram->pointer();
UINT8 x,dot,intensity;
UINT16 addr = (ma & 0xfc00) + ((ma & 0x100)<<2) + (ra << 4);
for(x=0;x<128;x+=8)
{
for(dot=0;dot<8;dot++)
{
intensity = (RAM[addr] >> (7-dot) & 0x01) | ((RAM[addr+0x200] >> (7-dot) & 0x01) << 1);
bitmap.pix32(y,x+dot) = MAKE_RGB(0x3f*intensity,0x2a*intensity,0x00);
}
addr++;
}
}
MC6845_INTERFACE( decodmd2_6845_intf )
{
NULL, /* screen name */
false, /* show border area */
16, /* number of pixels per video memory address */
8, /* number of pixels per video memory address */
NULL, /* begin_update */
NULL, /* update_row */
dmd_update_row, /* update_row */
NULL, /* end_update */
DEVCB_NULL, /* on_de_changed */
DEVCB_NULL, /* on_cur_changed */
@ -124,7 +147,7 @@ static MACHINE_CONFIG_FRAGMENT( decodmd2 )
MCFG_QUANTUM_TIME(attotime::from_hz(60))
MCFG_TIMER_DRIVER_ADD_PERIODIC("firq_timer",decodmd_type2_device,dmd_firq,attotime::from_hz(60))
MCFG_TIMER_DRIVER_ADD_PERIODIC("firq_timer",decodmd_type2_device,dmd_firq,attotime::from_hz(80))
MCFG_MC6845_ADD("dmd6845",MC6845,XTAL_8MHz / 8,decodmd2_6845_intf) // TODO: confirm clock speed
@ -133,7 +156,7 @@ static MACHINE_CONFIG_FRAGMENT( decodmd2 )
MCFG_SCREEN_ADD("dmd",RASTER)
MCFG_SCREEN_SIZE(128, 32)
MCFG_SCREEN_VISIBLE_AREA(0, 128-1, 0, 32-1)
MCFG_SCREEN_UPDATE_DRIVER(decodmd_type2_device, screen_update)
MCFG_SCREEN_UPDATE_DEVICE("dmd6845",mc6845_device, screen_update)
MCFG_SCREEN_REFRESH_RATE(60)
MCFG_RAM_ADD(RAM_TAG)
@ -191,25 +214,3 @@ void decodmd_type2_device::device_config_complete()
m_romregion = NULL;
}
}
UINT32 decodmd_type2_device::screen_update( screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect )
{
UINT16 addr = (START_ADDRESS & 0xfc00) | ((START_ADDRESS & 0x1ff) << 2);
UINT8* RAM = m_ram->pointer();
UINT8 x,y,dot,intensity;
for(y=0;y<bitmap.height();y++)
{
for(x=0;x<bitmap.width();x+=8)
{
for(dot=0;dot<8;dot++)
{
intensity = (RAM[addr] >> (7-dot) & 0x01) | ((RAM[addr+0x200] >> (7-dot) & 0x01) << 1);
bitmap.pix32(y,x+dot) = MAKE_RGB(0x3f*intensity,0x2a*intensity,0x00);
}
addr++;
}
}
return 0;
}

1
src/mame/video/decodmd2.h
View File

@ -44,6 +44,7 @@ public:
DECLARE_WRITE8_MEMBER(data_w);
DECLARE_READ8_MEMBER(busy_r);
DECLARE_WRITE8_MEMBER(ctrl_w);
DECLARE_READ8_MEMBER(ctrl_r);
DECLARE_READ8_MEMBER(status_r);
DECLARE_WRITE8_MEMBER(status_w);
TIMER_DEVICE_CALLBACK_MEMBER(dmd_firq);