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atarijsa.c
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2000-04-23
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/***************************************************************************
Atari Audio Board II
--------------------
6502 MEMORY MAP
Function Address R/W Data
---------------------------------------------------------------
Program RAM 0000-1FFF R/W D0-D7
Music (YM-2151) 2000-2001 R/W D0-D7
Read 68010 Port (Input Buffer) 280A R D0-D7
Self-test 280C R D7
Output Buffer Full (@2A02) (Active High) R D5
Left Coin Switch R D1
Right Coin Switch R D0
Interrupt acknowledge 2A00 W xx
Write 68010 Port (Outbut Buffer) 2A02 W D0-D7
Banked ROM select (at 3000-3FFF) 2A04 W D6-D7
??? 2A06 W
Effects 2C00-2C0F R/W D0-D7
Banked Program ROM (4 pages) 3000-3FFF R D0-D7
Static Program ROM (48K bytes) 4000-FFFF R D0-D7
****************************************************************************/
#include "machine/atarigen.h"
#include "sndhrdw/atarijsa.h"
#include "cpu/m6502/m6502.h"
static UINT8 *bank_base;
static UINT8 *bank_source_data;
static UINT8 speech_data;
static UINT8 last_ctl;
static UINT8 cpu_num;
static UINT8 input_port;
static UINT8 test_port;
static UINT16 test_mask;
static UINT8 has_pokey;
static UINT8 has_ym2151;
static UINT8 has_tms5220;
static UINT8 has_oki6295;
static UINT32 oki6295_bank_base;
static UINT8 overall_volume;
static UINT8 pokey_volume;
static UINT8 ym2151_volume;
static UINT8 tms5220_volume;
static UINT8 oki6295_volume;
static void update_all_volumes(void);
static READ_HANDLER( jsa1_io_r );
static WRITE_HANDLER( jsa1_io_w );
static READ_HANDLER( jsa2_io_r );
static WRITE_HANDLER( jsa2_io_w );
static READ_HANDLER( jsa3_io_r );
static WRITE_HANDLER( jsa3_io_w );
/*************************************
*
* External interfaces
*
*************************************/
void atarijsa_init(int cpunum, int inputport, int testport, int testmask)
{
int i;
/* copy in the parameters */
cpu_num = cpunum;
input_port = inputport;
test_port = testport;
test_mask = testmask;
/* predetermine the bank base */
bank_base = &memory_region(REGION_CPU1+cpunum)[0x03000];
bank_source_data = &memory_region(REGION_CPU1+cpunum)[0x10000];
/* determine which sound hardware is installed */
has_tms5220 = has_oki6295 = has_pokey = has_ym2151 = 0;
for (i = 0; i < MAX_SOUND; i++)
{
switch (Machine->drv->sound[i].sound_type)
{
case SOUND_TMS5220:
has_tms5220 = 1;
break;
case SOUND_OKIM6295:
has_oki6295 = 1;
break;
case SOUND_POKEY:
has_pokey = 1;
break;
case SOUND_YM2151:
has_ym2151 = 1;
break;
}
}
/* install POKEY memory handlers */
if (has_pokey)
{
install_mem_read_handler(cpunum, 0x2c00, 0x2c0f, pokey1_r);
install_mem_write_handler(cpunum, 0x2c00, 0x2c0f, pokey1_w);
}
atarijsa_reset();
}
void atarijsa_reset(void)
{
/* reset the sound I/O system */
atarigen_sound_io_reset(cpu_num);
/* reset the static states */
speech_data = 0;
last_ctl = 0;
oki6295_bank_base = 0x00000;
overall_volume = 100;
pokey_volume = 100;
ym2151_volume = 100;
tms5220_volume = 100;
oki6295_volume = 100;
/* Guardians of the Hood assumes we're reset to bank 0 on startup */
memcpy(bank_base, &bank_source_data[0x0000], 0x1000);
}
/*************************************
*
* JSA I I/O handlers
*
*************************************/
static READ_HANDLER( jsa1_io_r )
{
int result = 0xff;
switch (offset & 0x206)
{
case 0x000: /* n/c */
logerror("atarijsa: Unknown read at %04X\n", offset & 0x206);
break;
case 0x002: /* /RDP */
result = atarigen_6502_sound_r(offset);
break;
case 0x004: /* /RDIO */
/*
0x80 = self test
0x40 = NMI line state (active low)
0x20 = sound output full
0x10 = TMS5220 ready (active low)
0x08 = +5V
0x04 = +5V
0x02 = coin 2
0x01 = coin 1
*/
result = readinputport(input_port);
if (!(readinputport(test_port) & test_mask)) result ^= 0x80;
if (atarigen_cpu_to_sound_ready) result ^= 0x40;
if (atarigen_sound_to_cpu_ready) result ^= 0x20;
if (!has_tms5220 || tms5220_ready_r()) result ^= 0x10;
break;
case 0x006: /* /IRQACK */
atarigen_6502_irq_ack_r(0);
break;
case 0x200: /* /VOICE */
case 0x202: /* /WRP */
case 0x204: /* /WRIO */
case 0x206: /* /MIX */
logerror("atarijsa: Unknown read at %04X\n", offset & 0x206);
break;
}
return result;
}
static WRITE_HANDLER( jsa1_io_w )
{
switch (offset & 0x206)
{
case 0x000: /* n/c */
case 0x002: /* /RDP */
case 0x004: /* /RDIO */
logerror("atarijsa: Unknown write (%02X) at %04X\n", data & 0xff, offset & 0x206);
break;
case 0x006: /* /IRQACK */
atarigen_6502_irq_ack_r(0);
break;
case 0x200: /* /VOICE */
speech_data = data;
break;
case 0x202: /* /WRP */
atarigen_6502_sound_w(offset, data);
break;
case 0x204: /* WRIO */
/*
0xc0 = bank address
0x20 = coin counter 2
0x10 = coin counter 1
0x08 = squeak (tweaks the 5220 frequency)
0x04 = TMS5220 reset (active low)
0x02 = TMS5220 write strobe (active low)
0x01 = YM2151 reset (active low)
*/
/* handle TMS5220 I/O */
if (has_tms5220)
{
int count;
if (((data ^ last_ctl) & 0x02) && (data & 0x02))
tms5220_data_w(0, speech_data);
count = 5 | ((data >> 2) & 2);
tms5220_set_frequency(ATARI_CLOCK_14MHz/2 / (16 - count));
}
/* update the bank */
memcpy(bank_base, &bank_source_data[0x1000 * ((data >> 6) & 3)], 0x1000);
last_ctl = data;
break;
case 0x206: /* MIX */
/*
0xc0 = TMS5220 volume (0-3)
0x30 = POKEY volume (0-3)
0x0e = YM2151 volume (0-7)
0x01 = low-pass filter enable
*/
tms5220_volume = ((data >> 6) & 3) * 100 / 3;
pokey_volume = ((data >> 4) & 3) * 100 / 3;
ym2151_volume = ((data >> 1) & 7) * 100 / 7;
update_all_volumes();
break;
}
}
/*************************************
*
* JSA II I/O handlers
*
*************************************/
static READ_HANDLER( jsa2_io_r )
{
int result = 0xff;
switch (offset & 0x206)
{
case 0x000: /* /RDV */
if (has_oki6295)
result = OKIM6295_status_0_r(offset);
else
logerror("atarijsa: Unknown read at %04X\n", offset & 0x206);
break;
case 0x002: /* /RDP */
result = atarigen_6502_sound_r(offset);
break;
case 0x004: /* /RDIO */
/*
0x80 = self test
0x40 = NMI line state (active low)
0x20 = sound output full
0x10 = +5V
0x08 = +5V
0x04 = +5V
0x02 = coin 2
0x01 = coin 1
*/
result = readinputport(input_port);
if (!(readinputport(test_port) & test_mask)) result ^= 0x80;
if (atarigen_cpu_to_sound_ready) result ^= 0x40;
if (atarigen_sound_to_cpu_ready) result ^= 0x20;
break;
case 0x006: /* /IRQACK */
atarigen_6502_irq_ack_r(0);
break;
case 0x200: /* /WRV */
case 0x202: /* /WRP */
case 0x204: /* /WRIO */
case 0x206: /* /MIX */
logerror("atarijsa: Unknown read at %04X\n", offset & 0x206);
break;
}
return result;
}
static WRITE_HANDLER( jsa2_io_w )
{
switch (offset & 0x206)
{
case 0x000: /* /RDV */
case 0x002: /* /RDP */
case 0x004: /* /RDIO */
logerror("atarijsa: Unknown write (%02X) at %04X\n", data & 0xff, offset & 0x206);
break;
case 0x006: /* /IRQACK */
atarigen_6502_irq_ack_r(0);
break;
case 0x200: /* /WRV */
if (has_oki6295)
OKIM6295_data_0_w(offset, data);
else
logerror("atarijsa: Unknown write (%02X) at %04X\n", data & 0xff, offset & 0x206);
break;
case 0x202: /* /WRP */
atarigen_6502_sound_w(offset, data);
break;
case 0x204: /* /WRIO */
/*
0xc0 = bank address
0x20 = coin counter 2
0x10 = coin counter 1
0x08 = voice frequency (tweaks the OKI6295 frequency)
0x04 = OKI6295 reset (active low)
0x02 = n/c
0x01 = YM2151 reset (active low)
*/
/* update the bank */
memcpy(bank_base, &bank_source_data[0x1000 * ((data >> 6) & 3)], 0x1000);
last_ctl = data;
/* update the OKI frequency */
OKIM6295_set_frequency(0, ALL_VOICES, ATARI_CLOCK_14MHz/4/3 / ((data & 8) ? 132 : 165));
break;
case 0x206: /* /MIX */
/*
0xc0 = n/c
0x20 = low-pass filter enable
0x10 = n/c
0x0e = YM2151 volume (0-7)
0x01 = OKI6295 volume (0-1)
*/
ym2151_volume = ((data >> 1) & 7) * 100 / 7;
oki6295_volume = 50 + (data & 1) * 50;
update_all_volumes();
break;
}
}
/*************************************
*
* JSA III I/O handlers
*
*************************************/
static READ_HANDLER( jsa3_io_r )
{
int result = 0xff;
switch (offset & 0x206)
{
case 0x000: /* /RDV */
if (has_oki6295)
result = OKIM6295_status_0_r(offset);
break;
case 0x002: /* /RDP */
result = atarigen_6502_sound_r(offset);
break;
case 0x004: /* /RDIO */
/*
0x80 = self test (active high)
0x40 = NMI line state (active high)
0x20 = sound output full (active high)
0x10 = self test (active high)
0x08 = service (active high)
0x04 = tilt (active high)
0x02 = coin L (active high)
0x01 = coin R (active high)
*/
result = readinputport(input_port);
if (!(readinputport(test_port) & test_mask)) result ^= 0x90;
if (atarigen_cpu_to_sound_ready) result ^= 0x40;
if (atarigen_sound_to_cpu_ready) result ^= 0x20;
break;
case 0x006: /* /IRQACK */
atarigen_6502_irq_ack_r(0);
break;
case 0x200: /* /WRV */
case 0x202: /* /WRP */
case 0x204: /* /WRIO */
case 0x206: /* /MIX */
logerror("atarijsa: Unknown read at %04X\n", offset & 0x206);
break;
}
return result;
}
static WRITE_HANDLER( jsa3_io_w )
{
switch (offset & 0x206)
{
case 0x000: /* /RDV */
overall_volume = data * 100 / 127;
update_all_volumes();
break;
case 0x002: /* /RDP */
case 0x004: /* /RDIO */
logerror("atarijsa: Unknown write (%02X) at %04X\n", data & 0xff, offset & 0x206);
break;
case 0x006: /* /IRQACK */
atarigen_6502_irq_ack_r(0);
break;
case 0x200: /* /WRV */
if (has_oki6295)
OKIM6295_data_0_w(offset, data);
break;
case 0x202: /* /WRP */
atarigen_6502_sound_w(offset, data);
break;
case 0x204: /* /WRIO */
/*
0xc0 = bank address
0x20 = coin counter 2
0x10 = coin counter 1
0x08 = voice frequency (tweaks the OKI6295 frequency)
0x04 = OKI6295 reset (active low)
0x02 = OKI6295 bank bit 0
0x01 = YM2151 reset (active low)
*/
/* update the OKI bank */
oki6295_bank_base = (0x40000 * ((data >> 1) & 1)) | (oki6295_bank_base & 0x80000);
OKIM6295_set_bank_base(0, ALL_VOICES, oki6295_bank_base);
/* update the bank */
memcpy(bank_base, &bank_source_data[0x1000 * ((data >> 6) & 3)], 0x1000);
last_ctl = data;
/* update the OKI frequency */
OKIM6295_set_frequency(0, ALL_VOICES, ATARI_CLOCK_14MHz/4/3 / ((data & 8) ? 132 : 165));
break;
case 0x206: /* /MIX */
/*
0xc0 = n/c
0x20 = low-pass filter enable
0x10 = OKI6295 bank bit 1
0x0e = YM2151 volume (0-7)
0x01 = OKI6295 volume (0-1)
*/
/* update the OKI bank */
oki6295_bank_base = (0x80000 * ((data >> 4) & 1)) | (oki6295_bank_base & 0x40000);
OKIM6295_set_bank_base(0, ALL_VOICES, oki6295_bank_base);
/* update the volumes */
ym2151_volume = ((data >> 1) & 7) * 100 / 7;
oki6295_volume = 50 + (data & 1) * 50;
update_all_volumes();
break;
}
}
/*************************************
*
* JSA IIIS I/O handlers
*
*************************************/
static READ_HANDLER( jsa3s_io_r )
{
int result = 0xff;
switch (offset & 0x206)
{
case 0x000: /* /RDV */
if (has_oki6295)
{
if (offset & 1)
result = OKIM6295_status_1_r(offset);
else
result = OKIM6295_status_0_r(offset);
}
break;
case 0x002: /* /RDP */
result = atarigen_6502_sound_r(offset);
break;
case 0x004: /* /RDIO */
/*
0x80 = self test (active high)
0x40 = NMI line state (active high)
0x20 = sound output full (active high)
0x10 = self test (active high)
0x08 = service (active high)
0x04 = tilt (active high)
0x02 = coin L (active high)
0x01 = coin R (active high)
*/
result = readinputport(input_port);
if (!(readinputport(test_port) & test_mask)) result ^= 0x90;
if (atarigen_cpu_to_sound_ready) result ^= 0x40;
if (atarigen_sound_to_cpu_ready) result ^= 0x20;
break;
case 0x006: /* /IRQACK */
atarigen_6502_irq_ack_r(0);
break;
case 0x200: /* /WRV */
case 0x202: /* /WRP */
case 0x204: /* /WRIO */
case 0x206: /* /MIX */
logerror("atarijsa: Unknown read at %04X\n", offset & 0x206);
break;
}
return result;
}
static WRITE_HANDLER( jsa3s_io_w )
{
switch (offset & 0x206)
{
case 0x000: /* /RDV */
overall_volume = data * 100 / 127;
update_all_volumes();
break;
case 0x002: /* /RDP */
case 0x004: /* /RDIO */
logerror("atarijsa: Unknown write (%02X) at %04X\n", data & 0xff, offset & 0x206);
break;
case 0x006: /* /IRQACK */
atarigen_6502_irq_ack_r(0);
break;
case 0x200: /* /WRV */
if (has_oki6295)
{
if (offset & 1)
OKIM6295_data_1_w(offset, data);
else
OKIM6295_data_0_w(offset, data);
}
break;
case 0x202: /* /WRP */
atarigen_6502_sound_w(offset, data);
break;
case 0x204: /* /WRIO */
/*
0xc0 = bank address
0x20 = coin counter 2
0x10 = coin counter 1
0x08 = voice frequency (tweaks the OKI6295 frequency)
0x04 = OKI6295 reset (active low)
0x02 = left OKI6295 bank bit 0
0x01 = YM2151 reset (active low)
*/
/* update the OKI bank */
oki6295_bank_base = (0x40000 * ((data >> 1) & 1)) | (oki6295_bank_base & 0x80000);
OKIM6295_set_bank_base(0, ALL_VOICES, oki6295_bank_base);
/* update the bank */
memcpy(bank_base, &bank_source_data[0x1000 * ((data >> 6) & 3)], 0x1000);
last_ctl = data;
/* update the OKI frequency */
OKIM6295_set_frequency(0, ALL_VOICES, ATARI_CLOCK_14MHz/4/3 / ((data & 8) ? 132 : 165));
OKIM6295_set_frequency(1, ALL_VOICES, ATARI_CLOCK_14MHz/4/3 / ((data & 8) ? 132 : 165));
break;
case 0x206: /* /MIX */
/*
0xc0 = right OKI6295 bank bits 0-1
0x20 = low-pass filter enable
0x10 = left OKI6295 bank bit 1
0x0e = YM2151 volume (0-7)
0x01 = OKI6295 volume (0-1)
*/
/* update the OKI bank */
oki6295_bank_base = (0x80000 * ((data >> 4) & 1)) | (oki6295_bank_base & 0x40000);
OKIM6295_set_bank_base(0, ALL_VOICES, oki6295_bank_base);
OKIM6295_set_bank_base(1, ALL_VOICES, 0x40000 * (data >> 6));
/* update the volumes */
ym2151_volume = ((data >> 1) & 7) * 100 / 7;
oki6295_volume = 50 + (data & 1) * 50;
update_all_volumes();
break;
}
}
/*************************************
*
* Volume helpers
*
*************************************/
static void update_all_volumes(void)
{
if (has_pokey) atarigen_set_pokey_vol(overall_volume * pokey_volume / 100);
if (has_ym2151) atarigen_set_ym2151_vol(overall_volume * ym2151_volume / 100);
if (has_tms5220) atarigen_set_tms5220_vol(overall_volume * tms5220_volume / 100);
if (has_oki6295) atarigen_set_oki6295_vol(overall_volume * oki6295_volume / 100);
}
/*************************************
*
* Sound CPU memory handlers
*
*************************************/
struct MemoryReadAddress atarijsa1_readmem[] =
{
{ 0x0000, 0x1fff, MRA_RAM },
{ 0x2000, 0x2001, YM2151_status_port_0_r },
{ 0x2800, 0x2bff, jsa1_io_r },
{ 0x3000, 0xffff, MRA_ROM },
{ -1 } /* end of table */
};
struct MemoryWriteAddress atarijsa1_writemem[] =
{
{ 0x0000, 0x1fff, MWA_RAM },
{ 0x2000, 0x2000, YM2151_register_port_0_w },
{ 0x2001, 0x2001, YM2151_data_port_0_w },
{ 0x2800, 0x2bff, jsa1_io_w },
{ 0x3000, 0xffff, MWA_ROM },
{ -1 } /* end of table */
};
struct MemoryReadAddress atarijsa2_readmem[] =
{
{ 0x0000, 0x1fff, MRA_RAM },
{ 0x2000, 0x2001, YM2151_status_port_0_r },
{ 0x2800, 0x2bff, jsa2_io_r },
{ 0x3000, 0xffff, MRA_ROM },
{ -1 } /* end of table */
};
struct MemoryWriteAddress atarijsa2_writemem[] =
{
{ 0x0000, 0x1fff, MWA_RAM },
{ 0x2000, 0x2000, YM2151_register_port_0_w },
{ 0x2001, 0x2001, YM2151_data_port_0_w },
{ 0x2800, 0x2bff, jsa2_io_w },
{ 0x3000, 0xffff, MWA_ROM },
{ -1 } /* end of table */
};
struct MemoryReadAddress atarijsa3_readmem[] =
{
{ 0x0000, 0x1fff, MRA_RAM },
{ 0x2000, 0x2001, YM2151_status_port_0_r },
{ 0x2800, 0x2bff, jsa3_io_r },
{ 0x3000, 0xffff, MRA_ROM },
{ -1 } /* end of table */
};
struct MemoryWriteAddress atarijsa3_writemem[] =
{
{ 0x0000, 0x1fff, MWA_RAM },
{ 0x2000, 0x2000, YM2151_register_port_0_w },
{ 0x2001, 0x2001, YM2151_data_port_0_w },
{ 0x2800, 0x2bff, jsa3_io_w },
{ 0x3000, 0xffff, MWA_ROM },
{ -1 } /* end of table */
};
struct MemoryReadAddress atarijsa3s_readmem[] =
{
{ 0x0000, 0x1fff, MRA_RAM },
{ 0x2000, 0x2001, YM2151_status_port_0_r },
{ 0x2800, 0x2bff, jsa3s_io_r },
{ 0x3000, 0xffff, MRA_ROM },
{ -1 } /* end of table */
};
struct MemoryWriteAddress atarijsa3s_writemem[] =
{
{ 0x0000, 0x1fff, MWA_RAM },
{ 0x2000, 0x2000, YM2151_register_port_0_w },
{ 0x2001, 0x2001, YM2151_data_port_0_w },
{ 0x2800, 0x2bff, jsa3s_io_w },
{ 0x3000, 0xffff, MWA_ROM },
{ -1 } /* end of table */
};
/*************************************
*
* Sound definitions
*
*************************************/
struct TMS5220interface atarijsa_tms5220_interface =
{
ATARI_CLOCK_14MHz/2/11, /* potentially ATARI_CLOCK_14MHz/2/9 as well */
100,
0
};
struct POKEYinterface atarijsa_pokey_interface =
{
1, /* 1 chip */
ATARI_CLOCK_14MHz/8,
{ 40 },
};
struct YM2151interface atarijsa_ym2151_interface_mono =
{
1, /* 1 chip */
ATARI_CLOCK_14MHz/4,
{ YM3012_VOL(30,MIXER_PAN_CENTER,30,MIXER_PAN_CENTER) },
{ atarigen_ym2151_irq_gen }
};
struct YM2151interface atarijsa_ym2151_interface_stereo =
{
1, /* 1 chip */
ATARI_CLOCK_14MHz/4,
{ YM3012_VOL(60,MIXER_PAN_LEFT,60,MIXER_PAN_RIGHT) },
{ atarigen_ym2151_irq_gen }
};
struct YM2151interface atarijsa_ym2151_interface_stereo_swapped =
{
1, /* 1 chip */
ATARI_CLOCK_14MHz/4,
{ YM3012_VOL(60,MIXER_PAN_RIGHT,60,MIXER_PAN_LEFT) },
{ atarigen_ym2151_irq_gen }
};
struct OKIM6295interface atarijsa_okim6295_interface_REGION_SOUND1 =
{
1, /* 1 chip */
{ ATARI_CLOCK_14MHz/4/3/132 },
{ REGION_SOUND1 },
{ 75 }
};
struct OKIM6295interface atarijsa_okim6295s_interface_REGION_SOUND1 =
{
2, /* 2 chips */
{ ATARI_CLOCK_14MHz/4/3/132, ATARI_CLOCK_14MHz/4/3/132 },
{ REGION_SOUND1, REGION_SOUND1 },
{ MIXER(75,MIXER_PAN_LEFT), MIXER(75,MIXER_PAN_RIGHT) }
};