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unistar: Add CRTC (nw)

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This commit is contained in:
AJR 2018-06-22 22:33:04 -04:00
parent c0003099ac
commit 888aec7e77
1 changed files with 22 additions and 11 deletions
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33
src/mame/drivers/unistar.cpp
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@ -6,7 +6,7 @@
2009-12-09 Skeleton driver.
Chips used: i8275, AM9513, i8085, i8237, i8255, 2x 2651. XTAL 20MHz
Chips used: i8275, AM9513, AM8085A-2, i8237, i8255, 2x 2651. XTAL 20MHz
****************************************************************************/
@ -14,6 +14,7 @@
#include "cpu/i8085/i8085.h"
#include "machine/am9513.h"
#include "machine/i8255.h"
#include "video/i8275.h"
#include "emupal.h"
#include "screen.h"
@ -27,13 +28,14 @@ public:
, m_p_chargen(*this, "chargen")
{ }
DECLARE_PALETTE_INIT(unistar);
uint32_t screen_update_unistar(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
void unistar(machine_config &config);
private:
DECLARE_PALETTE_INIT(unistar);
I8275_DRAW_CHARACTER_MEMBER(draw_character);
void unistar_io(address_map &map);
void unistar_mem(address_map &map);
private:
virtual void machine_reset() override;
required_device<cpu_device> m_maincpu;
required_region_ptr<u8> m_p_chargen;
@ -51,14 +53,21 @@ void unistar_state::unistar_io(address_map &map)
{
//ADDRESS_MAP_UNMAP_HIGH
map.global_mask(0xff);
map(0x84, 0x84).portr("CONFIG");
map(0x8c, 0x8d).rw("stc", FUNC(am9513_device::read8), FUNC(am9513_device::write8));
map(0x94, 0x97).rw("ppi", FUNC(i8255_device::read), FUNC(i8255_device::write));
map(0x98, 0x99).rw("crtc", FUNC(i8275_device::read), FUNC(i8275_device::write));
// ports used: 00,02,03(W),08(RW),09,0A,0B,0D,0F(W),80,81(R),82,83(W),84(R),8C,8D(W),94(R),97,98(W),99(RW)
// if nonzero returned from port 94, it goes into test mode.
}
/* Input ports */
static INPUT_PORTS_START( unistar )
PORT_START("CONFIG")
PORT_DIPNAME(0x01, 0x01, "Screen Refresh Rate")
PORT_DIPSETTING(0x01, "50 Hz")
PORT_DIPSETTING(0x00, "60 Hz")
PORT_BIT(0xfe, 0xfe, IPT_UNKNOWN)
INPUT_PORTS_END
@ -73,9 +82,8 @@ PALETTE_INIT_MEMBER( unistar_state, unistar )
palette.set_pen_color(2, 0, 128, 0 ); /* Dimmed */
}
uint32_t unistar_state::screen_update_unistar(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
I8275_DRAW_CHARACTER_MEMBER(unistar_state::draw_character)
{
return 0;
}
/* F4 Character Displayer */
@ -98,11 +106,11 @@ GFXDECODE_END
MACHINE_CONFIG_START(unistar_state::unistar)
/* basic machine hardware */
MCFG_DEVICE_ADD("maincpu",I8085A, XTAL(2'000'000))
MCFG_DEVICE_ADD("maincpu", I8085A, 20_MHz_XTAL / 2)
MCFG_DEVICE_PROGRAM_MAP(unistar_mem)
MCFG_DEVICE_IO_MAP(unistar_io)
MCFG_DEVICE_ADD("stc", AM9513, XTAL(8'000'000))
MCFG_DEVICE_ADD("stc", AM9513, 8_MHz_XTAL)
MCFG_AM9513_FOUT_CALLBACK(WRITELINE("stc", am9513_device, source1_w))
MCFG_DEVICE_ADD("ppi", I8255A, 0)
@ -113,8 +121,11 @@ MACHINE_CONFIG_START(unistar_state::unistar)
MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) /* not accurate */
MCFG_SCREEN_SIZE(640, 480)
MCFG_SCREEN_VISIBLE_AREA(0, 640-1, 0, 480-1)
MCFG_SCREEN_UPDATE_DRIVER(unistar_state, screen_update_unistar)
MCFG_SCREEN_PALETTE("palette")
MCFG_SCREEN_UPDATE_DEVICE("crtc", i8275_device, screen_update)
MCFG_DEVICE_ADD("crtc", I8275, 20_MHz_XTAL / 8.5) // clock is probably wrong
MCFG_I8275_CHARACTER_WIDTH(8)
MCFG_I8275_DRAW_CHARACTER_CALLBACK_OWNER(unistar_state, draw_character)
MCFG_DEVICE_ADD("gfxdecode", GFXDECODE, "palette", gfx_unistar)
MCFG_PALETTE_ADD("palette", 3)