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konami/viper.cpp: correct PowerPC clocks [Guru]

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This commit is contained in:
angelosa 2023-12-04 04:54:27 +01:00
parent af3a99f577
commit 57529aebd3
1 changed files with 8 additions and 6 deletions
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14
src/mame/konami/viper.cpp
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@ -89,17 +89,20 @@
- hookup adc0838
- Understand what really enables sound irq, can't be from Voodoo PCIINT.
\- tsurugi, boxingm, mfightc: no sound;
\- thrild2: no BGMs;
- xtrial: hangs when coined up;
- gticlub2: throws NETWORK ERROR after course select;
- jpark3: attract mode demo play acts weird, the dinosaur gets submerged
and camera doesn't really know what to do, CPU core bug?
- jpark3: crashes during second attract cycle;
- sscopex: attract mode black screens (coin still works), sogeki/sscopefh are unaffected;
- sscopex, thrild2: attract mode black screens (coin still works), sogeki/sscopefh are unaffected;
- wcombat: black screen when entering service mode;
- mocapglf, sscopefh, sscopex: implement 2nd screen output, controlled by IP90C63A;
\- sscopex/sogeki desyncs during gameplay intro, leaves heavy trails in gameplay;
- ppp2nd: hangs when selecting game mode from service (manages to save);
- code1d, code1da, p9112: RTC self check bad;
- thrild2c: blue screen;
- thrild2ac: black screen;
- all games needs to be verified against factory settings
(game options, coin options & sound options often don't match "green colored" defaults)
@ -789,8 +792,7 @@ void viper_state::pci_config_data_w(uint64_t data)
// TODO: timing calculation, comes from fdr / dffsr
// most if not all games in the driver sets fdr = 0x27 = 512, dffsr = 0x21
// code1db is *extremely* sensitive to this value, should really be divided by 10
#define I2C_TIMER_FREQ (SDRAM_CLOCK / 512) / 64
#define I2C_TIMER_FREQ (SDRAM_CLOCK / 512) / 10
uint8_t viper_state::i2cdr_r(offs_t offset)
{
@ -1942,7 +1944,7 @@ void viper_state::viper_map(address_map &map)
map(0xffe80000, 0xffe80007).w(FUNC(viper_state::unk1a_w));
map(0xffe88000, 0xffe88007).w(FUNC(viper_state::unk1b_w));
map(0xffe98000, 0xffe98007).noprw();
map(0xffe9a000, 0xffe9bfff).ram(); // World Combat uses this
map(0xffe9a000, 0xffe9bfff).ram(); // wcombat uses this
map(0xffea0000, 0xffea0007).noprw(); // Gun sensor? Read heavily by p9112
map(0xfff00000, 0xfff3ffff).rom().region("user1", 0); // Boot ROM
}
@ -2492,8 +2494,8 @@ void viper_state::machine_reset()
void viper_state::viper(machine_config &config)
{
/* basic machine hardware */
MPC8240(config, m_maincpu, 166'666'666); // Unknown
m_maincpu->set_bus_frequency(100'000'000);
MPC8240(config, m_maincpu, XTAL(33'868'800) * 6); // PCI clock * 6
m_maincpu->set_bus_frequency(XTAL(33'868'800) * 2); // TODO: x2 for AGP, other devices x1
m_maincpu->set_addrmap(AS_PROGRAM, &viper_state::viper_map);
m_maincpu->set_vblank_int("screen", FUNC(viper_state::viper_vblank));