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03916: arabian: Missing bird at top of the screen. [Phil Bennett]
Hooked up Arabian MB8841 MCU and removed obsolete simulation code [Phil Bennett]
This commit is contained in:
Phil Bennett
parent
5f75b3dcf8
commit
fd1a3c34ba
@ -8,8 +8,7 @@
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* Arabian [2 sets]
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Known bugs:
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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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* none at this time
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****************************************************************************
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@ -41,30 +40,6 @@
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IRQ generated by VBLANK
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========================================================================
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========================================================================
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CPU #1 (Kangaroo)
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========================================================================
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0000-7FFF R xxxxxxxx Program ROM
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8000-BFFF R/W xxxxxxxx Bitmap RAM
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C000 R ----xxxx Coin inputs
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C200 R ----xxxx Option switches
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D000-DFFF R/W xxxxxxxx Custom microprocessor RAM
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E000 W ----xxxx BSEL Bank select
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E001 W xxxxxxxx DMA ROM start address low
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E002 W xxxxxxxx DMA ROM start address high
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E003 W xxxxxxxx DMA RAM start address low
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E004 W xxxxxxxx DMA RAM start address high
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E005 W xxxxxxxx Picture size/DMA start low
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E006 W xxxxxxxx Picture size/DMA start high
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========================================================================
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C800 W xxxxxxxx Sound chip address
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CA00 R/W xxxxxxxx Sound chip data
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========================================================================
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Interrupts:
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NMI not connected
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IRQ generated by VBLANK
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========================================================================
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***************************************************************************/
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#include "emu.h"
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@ -75,7 +50,6 @@
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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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@ -101,8 +75,6 @@ static WRITE8_DEVICE_HANDLER( ay8910_porta_w )
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static WRITE8_DEVICE_HANDLER( ay8910_portb_w )
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{
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arabian_state *state = device->machine->driver_data<arabian_state>();
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/*
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bit 5 = /IREQ to custom CPU
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bit 4 = /SRES to custom CPU
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@ -110,13 +82,8 @@ static WRITE8_DEVICE_HANDLER( ay8910_portb_w )
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bit 0 = coin 1 counter
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*/
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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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@ -127,101 +94,10 @@ static WRITE8_DEVICE_HANDLER( ay8910_portb_w )
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/*************************************
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*
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* Custom CPU RAM snooping
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* Custom CPU (MB8841 MCU)
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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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/* since we don't have a simulator for the Fujitsu 8841 4-bit microprocessor */
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/* we have to simulate its behavior; it looks like Arabian reads out of the */
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/* alternate CPU's RAM space while the CPU is running. If the CPU is not */
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/* running (i.e., the /SRES line is low), it needs to look like RAM to pass */
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/* the self-tests */
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static const char *const comnames[] = { "COM0", "COM1", "COM2", "COM3", "COM4", "COM5" };
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/* if the CPU reset line is being held down, just return RAM */
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if (state->custom_cpu_reset)
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return state->custom_cpu_ram[0x7f0 + offset];
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/* otherwise, assume the custom CPU is live */
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switch (offset)
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{
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/* 4-bit input ports from the custom */
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case 0:
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case 1:
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case 2:
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case 3:
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case 4:
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case 5:
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return input_port_read(space->machine, comnames[offset]);
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/* busy flag; this is polled to check the custom CPU's readiness */
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/* we just toggle it on and off until the main CPU gets the result */
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/* it wants. There appears to be a number of different ways to make */
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/* the custom turn this on. */
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case 6:
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return state->custom_cpu_busy ^= 1;
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/* handshake read; the main CPU writes to the previous memory location */
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/* and waits for the custom to copy that value here */
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case 8:
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return state->custom_cpu_ram[0x7f0 + offset - 1];
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/* error cases */
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default:
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logerror("Input Port %04X read. PC = %04X\n", offset + 0xd7f0, cpu_get_pc(space->cpu));
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}
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return 0;
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}
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static WRITE8_HANDLER( custom_cpu_w )
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{
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arabian_state *state = space->machine->driver_data<arabian_state>();
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state->custom_cpu_ram[0x7f0 + offset] = data;
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}
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static void update_flip_state( running_machine *machine )
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{
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arabian_state *state = machine->driver_data<arabian_state>();
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/* the custom CPU also controls the video flip control line; unfortunately, */
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/* it appears that the custom is smart enough to flip the screen itself, based */
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/* on the information stored at $d400 and $d401. The value at $d400 specifies */
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/* the active player number, and the value at $d401 is a copy of the input */
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/* port from $c200. Also, the value at $d34b controls the global flip screen */
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/* state. */
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/* initial state is based on the flip screen flag */
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state->flip_screen = state->custom_cpu_ram[0x34b];
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/* flip if not player 1 and cocktail mode */
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if (state->custom_cpu_ram[0x400] != 0 && !(state->custom_cpu_ram[0x401] & 0x02))
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state->flip_screen = !state->flip_screen;
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}
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static WRITE8_HANDLER( custom_flip_w )
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{
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arabian_state *state = space->machine->driver_data<arabian_state>();
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state->custom_cpu_ram[0x34b + offset] = data;
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update_flip_state(space->machine);
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}
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static WRITE8_HANDLER( custom_cocktail_w )
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{
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arabian_state *state = space->machine->driver_data<arabian_state>();
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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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@ -297,7 +173,7 @@ static WRITE8_HANDLER( mcu_port_p_w )
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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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@ -311,12 +187,7 @@ 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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@ -340,14 +211,14 @@ ADDRESS_MAP_END
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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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@ -479,18 +350,16 @@ static MACHINE_START( arabian )
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{
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arabian_state *state = machine->driver_data<arabian_state>();
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state_save_register_global(machine, state->custom_cpu_reset);
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state_save_register_global(machine, state->custom_cpu_busy);
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state_save_register_global(machine, state->mcu_port_o);
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state_save_register_global(machine, state->mcu_port_p);
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state_save_register_global_array(machine, state->mcu_port_r);
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}
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static MACHINE_RESET( arabian )
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{
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arabian_state *state = machine->driver_data<arabian_state>();
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state->custom_cpu_reset = 0;
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state->custom_cpu_busy = 0;
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state->video_control = 0;
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state->flip_screen = 0;
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}
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static MACHINE_CONFIG_START( arabian, arabian_state )
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@ -501,10 +370,8 @@ 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_CPU_ADD("mcu", MB8841, MAIN_OSC/3/2)
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MDRV_CPU_IO_MAP(mcu_io_map)
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MDRV_MACHINE_START(arabian)
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MDRV_MACHINE_RESET(arabian)
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@ -552,7 +419,7 @@ ROM_START( arabian )
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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_LOAD( "sun-8212.ic3", 0x000, 0x800, CRC(8869611e) SHA1(c6443f3bcb0cdb4d7b1b19afcbfe339c300f36aa) )
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ROM_END
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@ -570,7 +437,7 @@ ROM_START( arabiana )
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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_LOAD( "sun-8212.ic3", 0x000, 0x800, CRC(8869611e) SHA1(c6443f3bcb0cdb4d7b1b19afcbfe339c300f36aa) )
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ROM_END
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@ -583,12 +450,7 @@ 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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@ -23,10 +23,7 @@ public:
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UINT8 video_control;
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UINT8 flip_screen;
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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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/* MCU */
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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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