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segas32: multi 32 master clock is 32MHz [Guru],

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also got rid of clock defines, it gets messy with MASTER_CLOCK_S32 and MASTER_CLOCK_M32, and especially 2 defines for the timer0 clock
This commit is contained in:
hap 2024-08-25 18:31:45 +02:00
parent 546bf269bc
commit 8edd5dbf59
2 changed files with 23 additions and 22 deletions
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2
src/emu/xtal.cpp
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@ -417,7 +417,7 @@ const double XTAL::known_xtals[] = {
31'948'800, /* 31.9488_MHz_XTAL NEC PC-88xx, PC-98xx */
32'000'000, /* 32_MHz_XTAL - */
32'147'000, /* 32.147_MHz_XTAL Ampex 210+ 132-column display clock */
32'215'900, /* 32.2159_MHz_XTAL Sega Master System, Sega System 32 (close to 9x NTSC subcarrier which is 32.215905Mhz */
32'215'900, /* 32.2159_MHz_XTAL Sega System 32, Sega Game Gear (close to 9x NTSC subcarrier which is 32.215905Mhz */
32'220'000, /* 32.22_MHz_XTAL Typically used on 90's Data East PCBs */
32'256'000, /* 32.256_MHz_XTAL Hitachi MB-6890 */
32'317'400, /* 32.3174_MHz_XTAL DEC VT330, VT340 */

43
src/mame/sega/segas32.cpp
View File

@ -61,13 +61,13 @@ PCB Layout
| 93C46 D42264 |
|CNB SW2 D42264 |
| SW1 D42264 |
| CNA DSW1 32MHz 50MHz D42264 |
| CNA DSW1 32.2159MHz 50MHz D42264 |
|-------------------------------------------------------------------------------------------|
Notes:
V60 CPU running at 16.00MHz [32/2]
Z80 CPU running at 8.000MHz [32/4]
YM3438 running at 8.000MHz [32/4]
V60 CPU running at 16.108MHz [32.2159/2]
Z80 CPU running at 8.054MHz [32.2159/4]
YM3438 running at 8.054MHz [32.2159/4]
CNE/F/I - Multi-pin connectors for connection of ROM Board
CND - 4 pin connector for 2nd Speaker for Stereo Output
CNA - 30 pin connector for extra controls PCB
@ -211,7 +211,7 @@ Notes:
V70 CPU running at 20.00MHz [40/2]
Z80 CPU running at 8.000MHz [32/4]
YM3438 running at 8.000MHz [32/4]
315-5560 running at 8.000MHz [32/4]
315-5560 running at 10.000MHz [40/4]
CND/E/F/H: Multi-pin connectors for connection of ROM Board
CNC : 4 pin connector for 2nd Speaker for Stereo Output
CNJ : 32 pin connector (purpose unknown)
@ -605,13 +605,6 @@ segas32_state::segas32_state(const machine_config &mconfig, device_type type, co
*
*************************************/
#define MASTER_CLOCK 32.2159_MHz_XTAL
#define RFC_CLOCK 50_MHz_XTAL
#define MULTI32_CLOCK 40_MHz_XTAL
#define TIMER_0_CLOCK ((MASTER_CLOCK/2)/2048) /* confirmed */
#define TIMER_1_CLOCK ((RFC_CLOCK/16)/256) /* confirmed */
#define MAIN_IRQ_VBSTART 0
#define MAIN_IRQ_VBSTOP 1
#define MAIN_IRQ_SOUND 2
@ -725,8 +718,6 @@ uint8_t segas32_state::int_control_r(offs_t offset)
void segas32_state::int_control_w(offs_t offset, uint8_t data)
{
int duration;
// logerror("%06X:int_control_w(%X) = %02X\n", m_maincpu->pc(), offset, data);
switch (offset)
{
@ -754,25 +745,30 @@ void segas32_state::int_control_w(offs_t offset, uint8_t data)
case 8:
case 9: /* timer 0 count */
{
m_v60_irq_control[offset] = data;
duration = m_v60_irq_control[8] + ((m_v60_irq_control[9] << 8) & 0xf00);
uint16_t duration = m_v60_irq_control[8] | ((m_v60_irq_control[9] << 8) & 0xf00);
if (duration)
{
attotime period = attotime::from_hz(TIMER_0_CLOCK) * duration;
const XTAL xtal = m_is_multi32 ? 32_MHz_XTAL : 32.2159_MHz_XTAL;
attotime period = attotime::from_ticks(0x800 * duration, xtal / 2);
m_v60_irq_timer[0]->adjust(period, MAIN_IRQ_TIMER0);
}
break;
}
case 10:
case 11: /* timer 1 count */
{
m_v60_irq_control[offset] = data;
duration = m_v60_irq_control[10] + ((m_v60_irq_control[11] << 8) & 0xf00);
uint16_t duration = m_v60_irq_control[10] | ((m_v60_irq_control[11] << 8) & 0xf00);
if (duration)
{
attotime period = attotime::from_hz(TIMER_1_CLOCK) * duration;
attotime period = attotime::from_ticks(0x100 * duration, 50_MHz_XTAL / 16);
m_v60_irq_timer[1]->adjust(period, MAIN_IRQ_TIMER1);
}
break;
}
case 12:
case 13:
@ -2237,6 +2233,8 @@ GFXDECODE_END
void segas32_state::device_add_mconfig(machine_config &config)
{
constexpr XTAL MASTER_CLOCK = 32.2159_MHz_XTAL;
/* basic machine hardware */
V60(config, m_maincpu, MASTER_CLOCK/2);
m_maincpu->set_addrmap(AS_PROGRAM, &segas32_state::system32_map);
@ -2289,7 +2287,7 @@ void segas32_state::device_add_mconfig(machine_config &config)
ym2.add_route(0, "lspeaker", 0.40);
ym2.add_route(1, "rspeaker", 0.40);
rf5c68_device &rfsnd(RF5C68(config, "rfsnd", RFC_CLOCK/4)); // ASSP (RF)5C105 or Sega 315-5476A
rf5c68_device &rfsnd(RF5C68(config, "rfsnd", 50_MHz_XTAL/4)); // ASSP (RF)5C105 or Sega 315-5476A
rfsnd.add_route(0, "lspeaker", 0.55);
rfsnd.add_route(1, "rspeaker", 0.55);
rfsnd.set_addrmap(0, &segas32_state::rf5c68_map);
@ -2550,6 +2548,9 @@ segas32_cd_state::segas32_cd_state(const machine_config &mconfig, const char *ta
void sega_multi32_state::device_add_mconfig(machine_config &config)
{
constexpr XTAL MASTER_CLOCK = 32_MHz_XTAL;
constexpr XTAL MULTI32_CLOCK = 40_MHz_XTAL;
/* basic machine hardware */
V70(config, m_maincpu, MULTI32_CLOCK/2);
m_maincpu->set_addrmap(AS_PROGRAM, &sega_multi32_state::multi32_map);
@ -5833,8 +5834,8 @@ void segas32_state::init_jpark()
segas32_common_init();
pROM[0xC15A8/2] = 0xCD70;
pROM[0xC15AA/2] = 0xD8CD;
pROM[0xc15a8/2] = 0xcd70;
pROM[0xc15aa/2] = 0xd8cd;
m_sw1_output = &segas32_state::jpark_sw1_output;
}