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dfjail: Support the DAC samples. [R. Belmont]

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This commit is contained in:
arbee 2021-07-06 20:46:56 -04:00
parent c7ba9dc2fa
commit 633349ca06
2 changed files with 26 additions and 23 deletions
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47
src/mame/drivers/segas16b.cpp
View File

@ -1934,27 +1934,30 @@ void dfjail_state::sound_control_w(uint8_t data)
membank("soundbank")->set_base(memregion("soundcpu")->base() + 0x10000 + (bankoffs % size));
}
void dfjail_state::dac_data_w(uint8_t data)
void dfjail_state::dac_data_w(offs_t offset, uint8_t data)
{
// TODO: understand how this is hooked up
#if 0
switch(offset)
/*
Z80 code in the NMI handler at 0x6e:
Sample in A
Copy A to E
Shift A left 2 and AND by 3C
write A to port 0x80
Copy E to A
Shift right 4 times
write A to ports 0x81, 0x82, and 0x83
This means port 0x80 gets the bottom 4 bits of the 8-bit sample, offset by 2 bits,
and ports 81/82/83 get the top 4 bits of the sample, shifted right 4 bits.
*/
if (offset == 0)
{
case 0:
m_dac_data = (data & 0xf) << 0;
break;
case 1:
m_dac_data |= (data & 0xf) << 4;
break;
case 2:
m_dac_data |= (data & 0xf) << 8;
break;
case 3:
m_dac_data |= (data & 0xf) << 12;
m_dac->write(m_dac_data);
break;
m_dac_data = (data>>2) & 0xf;
}
else if (offset == 1)
{
m_dac_data |= (data << 4);
m_dac->write(m_dac_data);
}
#endif
}
void dfjail_state::dfjail_sound_iomap(address_map &map)
@ -4278,12 +4281,12 @@ void dfjail_state::dfjail(machine_config &config)
m_soundcpu->set_addrmap(AS_PROGRAM, &dfjail_state::bootleg_sound_map);
m_soundcpu->set_addrmap(AS_IO, &dfjail_state::dfjail_sound_iomap);
// connected to a 74ls74 clock source
m_soundcpu->set_periodic_int(FUNC(dfjail_state::soundirq_cb), attotime::from_hz(4*60)); // TODO: timing
m_soundcpu->set_periodic_int(FUNC(dfjail_state::soundirq_cb), attotime::from_hz(8000)); // This sets the sample rate of the DAC samples
//config.device_remove("ym2151");
config.device_remove("upd");
AD7533(config, m_dac, 0).add_route(ALL_OUTPUTS, "mono", 0.25); // AD7533KN
AD7533(config, m_dac, 0).add_route(ALL_OUTPUTS, "mono", 0.75); // AD7533KN
}
@ -5170,8 +5173,8 @@ ROM_START( dfjail )
ROM_REGION( 0x50000, "soundcpu", 0 ) // z80
ROM_LOAD( "29.f3", 0x000000, 0x008000, CRC(7f3ebb6a) SHA1(f265c6215ef457202686b31c9b503a0a371a1139) )
ROM_LOAD( "28.g3", 0x010000, 0x020000, CRC(ed96d6b9) SHA1(3ad096e466150d0ca36fec8dd649554e7fb9f654) )
ROM_LOAD( "27.g1", 0x030000, 0x020000, CRC(7a88e1c1) SHA1(b238b451522819a5a8c1a9e82058b86d33ac2272) )
ROM_LOAD( "28.g3", 0x030000, 0x020000, CRC(ed96d6b9) SHA1(3ad096e466150d0ca36fec8dd649554e7fb9f654) )
ROM_LOAD( "27.g1", 0x010000, 0x020000, CRC(7a88e1c1) SHA1(b238b451522819a5a8c1a9e82058b86d33ac2272) )
ROM_REGION( 0xc0000, "gfx1", 0 ) // tiles
ROM_LOAD( "9.f16", 0x000000, 0x020000, CRC(b2a49d12) SHA1(052b96109abc18c562c09042664738bac68f66b4) )

2
src/mame/includes/segas16b.h
View File

@ -302,7 +302,7 @@ public:
protected:
void sound_control_w(uint8_t data);
void dac_data_w(uint8_t data);
void dac_data_w(offs_t offset, uint8_t data);
INTERRUPT_GEN_MEMBER( soundirq_cb );
bool m_nmi_enable;
uint16_t m_dac_data;