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duet16: more devices and video (nw)

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This commit is contained in:
cracyc 2018-02-19 19:59:29 -06:00
parent aee499dbe7
commit f2a4d08fcc
1 changed files with 28 additions and 1 deletions
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29
src/mame/drivers/duet16.cpp
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@ -21,7 +21,9 @@ class duet16_state : public driver_device
public:
duet16_state(const machine_config &mconfig, device_type type, const char *tag) :
driver_device(mconfig, type, tag),
m_maincpu(*this, "maincpu")
m_maincpu(*this, "maincpu"),
m_chrrom(*this, "char"),
m_vram(*this, "vram")
{ }
void duet16(machine_config &config);
@ -31,12 +33,16 @@ private:
void duet16_io(address_map &map);
void duet16_mem(address_map &map);
required_device<cpu_device> m_maincpu;
required_memory_region m_chrrom;
required_shared_ptr<u16> m_vram;
};
ADDRESS_MAP_START(duet16_state::duet16_mem)
AM_RANGE(0x00000, 0x9ffff) AM_RAM
AM_RANGE(0xb8000, 0xbffff) AM_RAM
AM_RANGE(0xc0000, 0xc0fff) AM_RAM AM_SHARE("vram")
AM_RANGE(0xf8000, 0xf801f) AM_DEVREADWRITE8("dmac", am9517a_device, read, write, 0xff00)
AM_RANGE(0xf8040, 0xf804f) AM_DEVREADWRITE8("ptm", ptm6840_device, read, write, 0x00ff)
AM_RANGE(0xf8060, 0xf8067) AM_DEVREADWRITE8("bgpit", pit8253_device, read, write, 0x00ff)
AM_RANGE(0xf8080, 0xf8087) AM_DEVREADWRITE8("sio", upd7201_new_device, ba_cd_r, ba_cd_w, 0x00ff)
AM_RANGE(0xf80a0, 0xf80a1) AM_DEVREADWRITE8("kbusart", i8251_device, data_r, data_w, 0x00ff)
@ -51,7 +57,26 @@ ADDRESS_MAP_END
MC6845_UPDATE_ROW(duet16_state::crtc_update_row)
{
const rgb_t fg = 0xffffffff;
const rgb_t bg = 0;
u32 *p = &bitmap.pix32(y);
for(int i = 0; i < x_count; i++)
{
u16 offset = (ma + i) & 0x1fff;
u8 chr = m_vram[offset] & 0xff;
//u8 attr = m_vram[offset] >> 8;
u8 data = m_chrrom->base()[(chr * 16) + ra];
*p = (data & 0x80) ? fg : bg; p++;
*p = (data & 0x40) ? fg : bg; p++;
*p = (data & 0x20) ? fg : bg; p++;
*p = (data & 0x10) ? fg : bg; p++;
*p = (data & 0x08) ? fg : bg; p++;
*p = (data & 0x04) ? fg : bg; p++;
*p = (data & 0x02) ? fg : bg; p++;
*p = (data & 0x01) ? fg : bg; p++;
}
}
MACHINE_CONFIG_START(duet16_state::duet16)
@ -84,6 +109,8 @@ MACHINE_CONFIG_START(duet16_state::duet16)
MCFG_PIT8253_OUT2_HANDLER(DEVWRITELINE("kbusart", i8251_device, write_txc))
MCFG_DEVCB_CHAIN_OUTPUT(DEVWRITELINE("kbusart", i8251_device, write_rxc))
MCFG_DEVICE_ADD("ptm", PTM6840, 0)
MCFG_DEVICE_ADD("sio", UPD7201_NEW, 8_MHz_XTAL / 2)
MCFG_DEVICE_ADD("kbusart", I8251, 8_MHz_XTAL / 4)