static void YM2151_IRQ(int irq)
{
if (irq)
{
update_irq_lines(RST28_ASSERT);
}
else
{
update_irq_lines(RST28_CLEAR);
}
}
static READ_HANDLER( z80_in_sh )
{
unsigned char *ROM;
int port = offset & 0xff;
switch (port)
{
case 1:
case 0x41:
return YM2151ReadStatus(0);
break;
case 2: // M72 cmd latch
case 0x42: // M97 cmd latch
case 0x80: // M84 cmd latch
update_irq_lines(RST18_CLEAR);
return cmd_latch&0xff;
break;
case 0x84: // DAC memory read
ROM = rom_getregion(RGN_SAMP1);
if (!ROM) return 0;
return ROM[sample_addr];
break;
}
// printf("Unknown read from port %x (PC=%x)\n", port, _z80_get_reg(Z80_REG_PC));
return 0;
}
// used only by NMK16 bootlegs
void seibu_sound_device::main_mustb_w(offs_t, u16 data, u16 mem_mask)
{
if (ACCESSING_BITS_0_7)
m_main2sub[0] = data & 0xff;
if (ACCESSING_BITS_8_15)
m_main2sub[1] = data >> 8;
// logerror("seibu_main_mustb_w: %x -> %x %x\n", data, main2sub[0], main2sub[1]);
update_irq_lines(RST18_ASSERT);
}
void seibu_sound_device::device_reset()
{
int romlength = machine().root_device().memregion("audiocpu")->bytes();
UINT8 *rom = machine().root_device().memregion("audiocpu")->base();
m_sound_cpu = machine().device("audiocpu");
update_irq_lines(VECTOR_INIT);
if (romlength > 0x10000)
{
machine().root_device().membank("bank1")->configure_entries(0, (romlength - 0x10000) / 0x8000, rom + 0x10000, 0x8000);
/* Denjin Makai definitely needs this at start-up, it never writes to the bankswitch */
machine().root_device().membank("bank1")->set_entry(0);
}
}
void seibu_sound_device::main_w(offs_t offset, u8 data)
{
switch (offset)
{
case 0:
case 1:
m_main2sub[offset] = data;
break;
case 4:
update_irq_lines(RST18_ASSERT);
break;
case 2: //Sengoku Mahjong writes here
case 6:
/* just a guess */
m_sub2main_pending = 0;
m_main2sub_pending = 1;
break;
default:
//logerror("%s: seibu_main_w(%x,%02x)\n",machine().describe_context(),offset,data);
break;
}
}
void seibu_sound_device::rst18_ack_w(u8)
{
update_irq_lines(RST18_CLEAR);
}
void seibu_sound_device::device_reset()
{
update_irq_lines(VECTOR_INIT);
}
void seibu_sound_device::ym2203_irqhandler(int linestate)
{
update_irq_lines(linestate ? RST10_ASSERT : RST10_CLEAR);
}
void seibu_sound_device::device_reset()
{
m_sound_cpu = machine().device(":audiocpu");
update_irq_lines(VECTOR_INIT);
}
