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https://github.com/holub/mame
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arabian.c: Hooked up the MB8841 MCU (disabled by default as the game doesn't work properly when it's enabled) [Phil Bennett]
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Phil Bennett
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ac38657987
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e08a1c9eb1
@ -8,7 +8,8 @@
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* Arabian [2 sets]
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Known bugs:
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* none at this time
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* The large blue bird is missing (see MT 03916).
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* The game doesn't work properly when the MCU is emulated. Bad ROM?
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****************************************************************************
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@ -68,11 +69,13 @@
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#include "emu.h"
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#include "cpu/z80/z80.h"
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#include "cpu/mb88xx/mb88xx.h"
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#include "includes/arabian.h"
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#include "sound/ay8910.h"
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/* constants */
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#define MAIN_OSC XTAL_12MHz
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#define SIMULATE_MCU 1
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/*************************************
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@ -110,6 +113,11 @@ static WRITE8_DEVICE_HANDLER( ay8910_portb_w )
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/* track the custom CPU reset */
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state->custom_cpu_reset = ~data & 0x10;
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#if !SIMULATE_MCU
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cputag_set_input_line(device->machine, "mcu", MB88_IRQ_LINE, data & 0x20 ? CLEAR_LINE : ASSERT_LINE);
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cputag_set_input_line(device->machine, "mcu", INPUT_LINE_RESET, data & 0x10 ? CLEAR_LINE : ASSERT_LINE);
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#endif
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/* clock the coin counters */
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coin_counter_w(device->machine, 1, ~data & 0x02);
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coin_counter_w(device->machine, 0, ~data & 0x01);
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@ -122,7 +130,7 @@ static WRITE8_DEVICE_HANDLER( ay8910_portb_w )
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* Custom CPU RAM snooping
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*
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*************************************/
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#if SIMULATE_MCU
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static READ8_HANDLER( custom_cpu_r )
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{
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arabian_state *state = space->machine->driver_data<arabian_state>();
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@ -213,7 +221,83 @@ static WRITE8_HANDLER( custom_cocktail_w )
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state->custom_cpu_ram[0x400 + offset] = data;
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update_flip_state(space->machine);
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}
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#else
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static READ8_HANDLER( mcu_port_r_r )
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{
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arabian_state *state = space->machine->driver_data<arabian_state>();
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UINT8 val = state->mcu_port_r[offset];
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/* RAM mode is enabled */
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if (offset == 0)
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val |= 4;
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return val;
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}
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static WRITE8_HANDLER( mcu_port_r_w )
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{
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arabian_state *state = space->machine->driver_data<arabian_state>();
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if (offset == 0)
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{
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UINT32 ram_addr = ((state->mcu_port_p & 7) << 8) | state->mcu_port_o;
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if (~data & 2)
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state->custom_cpu_ram[ram_addr] = 0xf0 | state->mcu_port_r[3];
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state->flip_screen = data & 8;
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}
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state->mcu_port_r[offset] = data & 0x0f;
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}
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static READ8_HANDLER( mcu_portk_r )
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{
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arabian_state *state = space->machine->driver_data<arabian_state>();
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UINT8 val = 0xf;
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if (~state->mcu_port_r[0] & 1)
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{
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UINT32 ram_addr = ((state->mcu_port_p & 7) << 8) | state->mcu_port_o;
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val = state->custom_cpu_ram[ram_addr];
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}
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else
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{
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static const char *const comnames[] = { "COM0", "COM1", "COM2", "COM3", "COM4", "COM5" };
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UINT8 sel = ((state->mcu_port_r[2] << 4) | state->mcu_port_r[1]) & 0x3f;
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int i;
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for (i = 0; i < 6; ++i)
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{
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if (~sel & (1 << i))
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{
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val = input_port_read(space->machine, comnames[i]);
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break;
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}
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}
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}
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return val & 0x0f;
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}
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static WRITE8_HANDLER( mcu_port_o_w )
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{
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arabian_state *state = space->machine->driver_data<arabian_state>();
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UINT8 out = data & 0x0f;
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if (data & 0x10)
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state->mcu_port_o = (state->mcu_port_o & 0x0f) | (out << 4);
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else
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state->mcu_port_o = (state->mcu_port_o & 0xf0) | out;
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}
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static WRITE8_HANDLER( mcu_port_p_w )
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{
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arabian_state *state = space->machine->driver_data<arabian_state>();
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state->mcu_port_p = data & 0x0f;
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}
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#endif
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/*************************************
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@ -227,8 +311,12 @@ static ADDRESS_MAP_START( main_map, ADDRESS_SPACE_PROGRAM, 8 )
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AM_RANGE(0x8000, 0xbfff) AM_WRITE(arabian_videoram_w)
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AM_RANGE(0xc000, 0xc000) AM_MIRROR(0x01ff) AM_READ_PORT("IN0")
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AM_RANGE(0xc200, 0xc200) AM_MIRROR(0x01ff) AM_READ_PORT("DSW1")
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#if SIMULATE_MCU
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AM_RANGE(0xd000, 0xd7ef) AM_RAM AM_BASE_MEMBER(arabian_state, custom_cpu_ram)
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AM_RANGE(0xd7f0, 0xd7ff) AM_READWRITE(custom_cpu_r, custom_cpu_w)
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#else
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AM_RANGE(0xd000, 0xd7ff) AM_MIRROR(0x0800) AM_RAM AM_BASE_MEMBER(arabian_state, custom_cpu_ram)
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#endif
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AM_RANGE(0xe000, 0xe007) AM_MIRROR(0x0ff8) AM_WRITE(arabian_blitter_w) AM_BASE_MEMBER(arabian_state, blitter)
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ADDRESS_MAP_END
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@ -247,6 +335,21 @@ ADDRESS_MAP_END
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/*************************************
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*
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* MCU port handlers
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*
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*************************************/
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#if !SIMULATE_MCU
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static ADDRESS_MAP_START( mcu_io_map, ADDRESS_SPACE_IO, 8 )
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AM_RANGE(MB88_PORTK, MB88_PORTK ) AM_READ(mcu_portk_r)
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AM_RANGE(MB88_PORTO, MB88_PORTO ) AM_WRITE(mcu_port_o_w)
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AM_RANGE(MB88_PORTP, MB88_PORTP ) AM_WRITE(mcu_port_p_w)
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AM_RANGE(MB88_PORTR0, MB88_PORTR3) AM_READWRITE(mcu_port_r_r, mcu_port_r_w)
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ADDRESS_MAP_END
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#endif
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/*************************************
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*
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* Port definitions
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@ -398,6 +501,11 @@ static MACHINE_CONFIG_START( arabian, arabian_state )
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MDRV_CPU_IO_MAP(main_io_map)
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MDRV_CPU_VBLANK_INT("screen", irq0_line_hold)
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#if !SIMULATE_MCU
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MDRV_CPU_ADD("mcu", MB8841, MAIN_OSC/3/2)
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MDRV_CPU_IO_MAP(mcu_io_map)
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#endif
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MDRV_MACHINE_START(arabian)
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MDRV_MACHINE_RESET(arabian)
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@ -442,6 +550,9 @@ ROM_START( arabian )
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ROM_LOAD( "tvg-92.ic85", 0x2000, 0x2000, CRC(f7c6866d) SHA1(34f545c5f7c152cd59f7be0a72105f739852cd6a) )
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ROM_LOAD( "tvg-93.ic86", 0x4000, 0x2000, CRC(71acd48d) SHA1(cd0bffed351b14c9aebbfc1d3d4d232a5b91a68f) )
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ROM_LOAD( "tvg-94.ic87", 0x6000, 0x2000, CRC(82160b9a) SHA1(03511f6ebcf22ba709a80a565e71acf5bdecbabb) )
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ROM_REGION( 0x800, "mcu", 0 )
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ROM_LOAD( "sun-8212.ic3", 0x000, 0x800, BAD_DUMP CRC(8869611e) SHA1(c6443f3bcb0cdb4d7b1b19afcbfe339c300f36aa) )
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ROM_END
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@ -457,6 +568,9 @@ ROM_START( arabiana )
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ROM_LOAD( "tvg-92.ic85", 0x2000, 0x2000, CRC(f7c6866d) SHA1(34f545c5f7c152cd59f7be0a72105f739852cd6a) )
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ROM_LOAD( "tvg-93.ic86", 0x4000, 0x2000, CRC(71acd48d) SHA1(cd0bffed351b14c9aebbfc1d3d4d232a5b91a68f) )
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ROM_LOAD( "tvg-94.ic87", 0x6000, 0x2000, CRC(82160b9a) SHA1(03511f6ebcf22ba709a80a565e71acf5bdecbabb) )
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ROM_REGION( 0x800, "mcu", 0 )
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ROM_LOAD( "sun-8212.ic3", 0x000, 0x800, BAD_DUMP CRC(8869611e) SHA1(c6443f3bcb0cdb4d7b1b19afcbfe339c300f36aa) )
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ROM_END
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@ -469,8 +583,12 @@ ROM_END
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static DRIVER_INIT( arabian )
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{
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#if SIMULATE_MCU
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memory_install_write8_handler(cputag_get_address_space(machine, "maincpu", ADDRESS_SPACE_PROGRAM), 0xd34b, 0xd34b, 0, 0, custom_flip_w);
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memory_install_write8_handler(cputag_get_address_space(machine, "maincpu", ADDRESS_SPACE_PROGRAM), 0xd400, 0xd401, 0, 0, custom_cocktail_w);
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#else
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cputag_set_input_line(machine, "mcu", INPUT_LINE_RESET, ASSERT_LINE);
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#endif
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}
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@ -26,6 +26,10 @@ public:
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/* misc */
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UINT8 custom_cpu_reset;
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UINT8 custom_cpu_busy;
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UINT8 mcu_port_o;
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UINT8 mcu_port_p;
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UINT8 mcu_port_r[4];
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};
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