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ichiban: Figure out opcode/data split [O. Galibert]

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- Add NVRAM and start mapping devices (nw)
This commit is contained in:
AJR 2019-02-19 09:52:04 -05:00
parent 3bd5da37c0
commit 1ff00607de
1 changed files with 28 additions and 21 deletions
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49
src/mame/drivers/ichiban.cpp
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@ -5,8 +5,6 @@
Ichi Ban Jyan
Excel, 199?
TODO: code is encrypted (data, not opcodes)
PCB Layout
----------
@ -38,6 +36,7 @@ HSync - 15.510kHz
#include "emu.h"
#include "cpu/z80/z80.h"
#include "machine/nvram.h"
#include "sound/ay8910.h"
#include "sound/ym2413.h"
#include "emupal.h"
@ -67,8 +66,9 @@ private:
virtual void video_start() override;
uint32_t screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
void ichibanjyan_io(address_map &map);
void ichibanjyan_map(address_map &map);
void mem_map(address_map &map);
void io_map(address_map &map);
void opcodes_map(address_map &map);
};
void ichibanjyan_state::video_start()
@ -81,14 +81,24 @@ uint32_t ichibanjyan_state::screen_update( screen_device &screen, bitmap_ind16 &
}
void ichibanjyan_state::ichibanjyan_map(address_map &map)
void ichibanjyan_state::mem_map(address_map &map)
{
map(0x0000, 0x7fff).bankr("bank1");
map(0x0000, 0x6fff).rom().region("code", 0x10000);
map(0x7000, 0x7fff).ram().share("nvram");
map(0x8000, 0xffff).ram();
}
void ichibanjyan_state::ichibanjyan_io(address_map &map)
void ichibanjyan_state::io_map(address_map &map)
{
map.global_mask(0xff);
map(0x01, 0x01).r("aysnd", FUNC(ym2149_device::data_r));
map(0x02, 0x03).w("aysnd", FUNC(ym2149_device::data_address_w));
map(0x16, 0x17).w("ymsnd", FUNC(ym2413_device::write));
}
void ichibanjyan_state::opcodes_map(address_map &map)
{
map(0x0000, 0x6fff).rom().region("code", 0);
}
static INPUT_PORTS_START( ichibanjyan )
@ -113,9 +123,6 @@ GFXDECODE_END
void ichibanjyan_state::machine_start()
{
uint8_t *ROM = memregion("code")->base();
membank("bank1")->configure_entries(0, 4, ROM, 0x8000);
}
void ichibanjyan_state::machine_reset()
@ -126,18 +133,18 @@ void ichibanjyan_state::machine_reset()
MACHINE_CONFIG_START(ichibanjyan_state::ichibanjyan)
/* basic machine hardware */
MCFG_DEVICE_ADD("maincpu",Z80,MAIN_CLOCK/3)
MCFG_DEVICE_PROGRAM_MAP(ichibanjyan_map)
MCFG_DEVICE_IO_MAP(ichibanjyan_io)
Z80(config, m_maincpu, MAIN_CLOCK/3);
m_maincpu->set_addrmap(AS_PROGRAM, &ichibanjyan_state::mem_map);
m_maincpu->set_addrmap(AS_IO, &ichibanjyan_state::io_map);
m_maincpu->set_addrmap(AS_OPCODES, &ichibanjyan_state::opcodes_map);
NVRAM(config, "nvram", nvram_device::DEFAULT_ALL_0);
/* video hardware */
MCFG_SCREEN_ADD("screen", RASTER)
MCFG_SCREEN_REFRESH_RATE(60)
MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(0))
MCFG_SCREEN_UPDATE_DRIVER(ichibanjyan_state, screen_update)
MCFG_SCREEN_SIZE(32*8, 32*8)
MCFG_SCREEN_VISIBLE_AREA(0*8, 32*8-1, 2*8, 30*8-1)
MCFG_SCREEN_PALETTE("palette")
screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
screen.set_raw(MAIN_CLOCK/3, 396, 0, 320, 256, 0, 224); // dimensions guessed
screen.set_screen_update(FUNC(ichibanjyan_state::screen_update));
screen.set_palette("palette");
GFXDECODE(config, "gfxdecode", "palette", gfx_ichibanjyan);
@ -159,7 +166,7 @@ MACHINE_CONFIG_END
***************************************************************************/
ROM_START( ichiban )
ROM_REGION( 0x20000, "code", 0 )
ROM_REGION( 0x20000, "code", 0 ) // opcodes in first half are mixed with pseudo-random garbage
ROM_LOAD( "3.u15", 0, 0x20000, CRC(76240568) SHA1(cf055d1eaae25661a49ec4722a2c7caca862e66a) )
ROM_REGION( 0x20000, "gfx1", 0 )