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(MESS) gl4004: fixed lcd and ROM banking. (nw)

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This commit is contained in:
Sandro Ronco 2014-02-20 18:58:14 +00:00
parent 3138b2c660
commit 0ffeaba699
2 changed files with 44 additions and 4 deletions
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8
src/emu/video/hd44780.c
View File

@ -388,6 +388,14 @@ WRITE8_MEMBER(hd44780_device::control_write)
{
m_active_ram = DDRAM;
m_ac = m_ir & 0x7f;
if (m_num_line == 2 && m_ac > 0x27 && m_ac < 0x40)
m_ac = 0x40 + (m_ac - 0x28);
else if (m_num_line == 2 && m_ac > 0x67)
m_ac = 0x00 + (m_ac - 0x68);
else if (m_num_line == 1 && m_ac > 0x4f)
m_ac = 0x00 + (m_ac - 0x50);
set_busy_flag(37);
if (LOG) logerror("HD44780 '%s': set DDRAM address %x\n", tag(), m_ac);

40
src/mess/drivers/pc2000.c
View File

@ -31,6 +31,7 @@ public:
m_maincpu(*this, "maincpu"),
m_lcdc(*this, "hd44780"),
m_beep(*this, "beeper"),
m_bank0(*this, "bank0"),
m_bank1(*this, "bank1"),
m_bank2(*this, "bank2")
{ }
@ -38,6 +39,7 @@ public:
required_device<cpu_device> m_maincpu;
optional_device<hd44780_device> m_lcdc;
required_device<beep_device> m_beep;
optional_memory_bank m_bank0;
required_memory_bank m_bank1;
optional_memory_bank m_bank2;
@ -50,6 +52,7 @@ public:
DECLARE_DEVICE_IMAGE_LOAD_MEMBER( cart_load );
DECLARE_READ8_MEMBER( key_matrix_r );
DECLARE_WRITE8_MEMBER( key_matrix_w );
DECLARE_WRITE8_MEMBER( rombank0_w );
DECLARE_WRITE8_MEMBER( rombank1_w );
DECLARE_WRITE8_MEMBER( rombank2_w );
DECLARE_READ8_MEMBER( beep_r );
@ -72,6 +75,16 @@ public:
UINT32 screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
};
class gl4004_state : public pc2000_state
{
public:
gl4004_state(const machine_config &mconfig, device_type type, const char *tag)
: pc2000_state(mconfig, type, tag)
{ }
virtual void machine_start();
};
class pc1000_state : public pc2000_state
{
public:
@ -114,9 +127,14 @@ WRITE8_MEMBER( pc2000_state::key_matrix_w )
m_mux_data = data;
}
WRITE8_MEMBER( pc2000_state::rombank0_w )
{
m_bank0->set_entry(data & 0x1f);
}
WRITE8_MEMBER( pc2000_state::rombank1_w )
{
m_bank1->set_entry(data & 0x0f);
m_bank1->set_entry(data & 0x1f);
}
WRITE8_MEMBER( pc2000_state::rombank2_w )
@ -124,7 +142,7 @@ WRITE8_MEMBER( pc2000_state::rombank2_w )
if (data & 0x80)
m_bank2->set_entry(data & 0x8f); //cartridge
else
m_bank2->set_entry(data & 0x0f);
m_bank2->set_entry(data & 0x1f);
}
READ8_MEMBER( pc2000_state::beep_r )
@ -140,7 +158,7 @@ WRITE8_MEMBER( pc2000_state::beep_w )
static ADDRESS_MAP_START(pc2000_mem, AS_PROGRAM, 8, pc2000_state)
ADDRESS_MAP_UNMAP_HIGH
AM_RANGE(0x0000, 0x3fff) AM_ROM AM_REGION("bios", 0x00000)
AM_RANGE(0x0000, 0x3fff) AM_ROMBANK("bank0")
AM_RANGE(0x4000, 0x7fff) AM_ROMBANK("bank1")
AM_RANGE(0x8000, 0xbfff) AM_ROMBANK("bank2") //0x8000 - 0xbfff tests a cartridge, header is 0x55 0xaa 0x59 0x45, if it succeeds a jump at 0x8004 occurs
AM_RANGE(0xc000, 0xdfff) AM_RAM
@ -149,6 +167,7 @@ ADDRESS_MAP_END
static ADDRESS_MAP_START( pc2000_io , AS_IO, 8, pc2000_state)
ADDRESS_MAP_UNMAP_HIGH
ADDRESS_MAP_GLOBAL_MASK(0xff)
AM_RANGE(0x00, 0x00) AM_WRITE(rombank0_w)
AM_RANGE(0x01, 0x01) AM_WRITE(rombank1_w)
AM_RANGE(0x03, 0x03) AM_WRITE(rombank2_w)
AM_RANGE(0x0a, 0x0b) AM_DEVREADWRITE("hd44780", hd44780_device, read, write)
@ -695,14 +714,27 @@ void pc2000_state::machine_start()
UINT8 *bios = memregion("bios")->base();
UINT8 *cart = memregion("cart")->base();
m_bank0->configure_entries(0, 0x10, bios, 0x4000);
m_bank1->configure_entries(0, 0x10, bios, 0x4000);
m_bank2->configure_entries(0, 0x10, bios, 0x4000);
m_bank2->configure_entries(0x80, 0x10, cart, 0x4000);
}
void gl4004_state::machine_start()
{
UINT8 *bios = memregion("bios")->base();
UINT8 *cart = memregion("cart")->base();
m_bank0->configure_entries(0, 0x20, bios, 0x4000);
m_bank1->configure_entries(0, 0x20, bios, 0x4000);
m_bank2->configure_entries(0, 0x20, bios, 0x4000);
m_bank2->configure_entries(0x80, 0x10, cart, 0x4000);
}
void pc2000_state::machine_reset()
{
//set the initial bank
m_bank0->set_entry(0);
m_bank1->set_entry(0);
m_bank2->set_entry(0);
}
@ -813,7 +845,7 @@ static MACHINE_CONFIG_DERIVED_CLASS( gl3000s, pc2000, gl3000s_state )
MCFG_GFXDECODE_MODIFY("gfxdecode", gl3000s)
MACHINE_CONFIG_END
static MACHINE_CONFIG_DERIVED( gl4000, pc2000 )
static MACHINE_CONFIG_DERIVED_CLASS( gl4000, pc2000, gl4004_state )
MCFG_SCREEN_MODIFY("screen")
MCFG_SCREEN_SIZE(120, 36) // 4x20 chars
MCFG_SCREEN_VISIBLE_AREA(0, 120-1, 0, 36-1)