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Default for ISM, there were some spurious irqs at boot ...

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This commit is contained in:
Angelo Salese 2013-02-21 22:33:10 +00:00
parent 523413c4a5
commit 423bab6d8f
2 changed files with 29 additions and 22 deletions
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48
src/mame/drivers/saturn.c
View File

@ -191,10 +191,9 @@ DMA TODO:
#define DRUP(_lv_) (m_scu_regs[5+(_lv_*8)] & 0x00010000)
#define DWUP(_lv_) (m_scu_regs[5+(_lv_*8)] & 0x00000100)
#define DMA_STATUS (m_scu_regs[31])
/*These macros sets the various DMA status flags.*/
#define DnMV_1(_ch_) DMA_STATUS|=(0x10 << 4 * _ch_)
#define DnMV_0(_ch_) DMA_STATUS&=~(0x10 << 4 * _ch_)
#define DnMV_1(_ch_) m_scu.status|=(0x10 << 4 * _ch_)
#define DnMV_0(_ch_) m_scu.status&=~(0x10 << 4 * _ch_)
/*For area checking*/
#define BIOS_BUS(var) (var & 0x07000000) == 0
@ -258,11 +257,11 @@ READ32_MEMBER(saturn_state::saturn_scu_r)
case 0x5c/4:
// Super Major League and Shin Megami Tensei - Akuma Zensho reads from there (undocumented), DMA status mirror?
if(LOG_SCU && !space.debugger_access()) logerror("(PC=%08x) DMA status reg read\n",space.device().safe_pc());
res = m_scu_regs[0x7c/4];
res = m_scu.status;
break;
case 0x7c/4:
if(LOG_SCU && !space.debugger_access()) logerror("(PC=%08x) DMA status reg read\n",space.device().safe_pc());
res = m_scu_regs[offset];
res = m_scu.status;
break;
case 0x80/4:
res = dsp_prg_ctrl_r(space);
@ -366,7 +365,10 @@ WRITE32_MEMBER(saturn_state::saturn_scu_w)
m_scu.ist &= m_scu_regs[offset];
scu_test_pending_irq();
break;
case 0xa8/4: if(LOG_SCU) logerror("A-Bus IRQ ACK %08x\n",m_scu_regs[42]); break;
case 0xa8/4:
/* This sends an irq signal to the extra devices connected to the A-Bus, not really needed for now. */
//if(LOG_SCU) logerror("A-Bus IRQ ACK %08x\n",m_scu_regs[42]);
break;
case 0xc4/4: if(LOG_SCU) logerror("SCU SDRAM set: %02x\n",m_scu_regs[49]); break;
default: if(LOG_SCU) logerror("Warning: unused SCU reg set %d = %08x\n",offset,data);
}
@ -1663,6 +1665,16 @@ WRITE32_MEMBER(saturn_state::saturn_cs1_w)
m_cart_backupram[offset*2+1] = (data & 0x000000ff) >> 0;
}
void saturn_state::scu_reset(void)
{
m_scu.ism = 0xbfff;
m_scu.ist = 0;
m_scu.start_factor[0] = 7;
m_scu.start_factor[1] = 7;
m_scu.start_factor[2] = 7;
m_scu.status = 0;
}
MACHINE_RESET_MEMBER(saturn_state,saturn)
{
m_scsp_last_line = 0;
@ -1673,11 +1685,12 @@ MACHINE_RESET_MEMBER(saturn_state,saturn)
m_smpc.SR = 0x40; // this bit is always on according to docs
scu_reset();
m_en_68k = 0;
m_NMI_reset = 0;
m_smpc.slave_on = 0;
m_scu_regs[31] = 0; //DMA_STATUS = 0;
//memset(stv_m_workram_l, 0, 0x100000);
//memset(stv_m_workram_h, 0, 0x100000);
@ -1732,12 +1745,6 @@ MACHINE_RESET_MEMBER(saturn_state,saturn)
machine().device("slave")->memory().space(AS_PROGRAM).install_readwrite_handler(0x04000000, 0x04000000 | mask, read32_delegate(FUNC(saturn_state::saturn_cs1_r),this), write32_delegate(FUNC(saturn_state::saturn_cs1_w),this));
}
/* TODO: default value is probably 7 */
m_scu.start_factor[0] = -1;
m_scu.start_factor[1] = -1;
m_scu.start_factor[2] = -1;
m_vdp2.old_crmd = -1;
m_vdp2.old_tvmd = -1;
@ -1766,10 +1773,7 @@ MACHINE_RESET_MEMBER(saturn_state,stv)
m_stv_rtc_timer->adjust(attotime::zero, 0, attotime::from_seconds(1));
m_prev_bankswitch = 0xff;
/* TODO: default value is probably 7 */
m_scu.start_factor[0] = -1;
m_scu.start_factor[1] = -1;
m_scu.start_factor[2] = -1;
scu_reset();
m_vdp2.old_crmd = -1;
m_vdp2.old_tvmd = -1;
@ -1913,11 +1917,11 @@ void saturn_state::saturn_init_driver(int rgn)
m_minit_boost_timeslice = attotime::zero;
m_sinit_boost_timeslice = attotime::zero;
m_scu_regs = auto_alloc_array(machine(), UINT32, 0x100/4);
m_scsp_regs = auto_alloc_array(machine(), UINT16, 0x1000/2);
m_cart_dram = auto_alloc_array(machine(), UINT32, 0x400000/4);
m_backupram = auto_alloc_array(machine(), UINT8, 0x8000);
m_cart_backupram = auto_alloc_array(machine(), UINT8, 0x400000);
m_scu_regs = auto_alloc_array_clear(machine(), UINT32, 0x100/4);
m_scsp_regs = auto_alloc_array_clear(machine(), UINT16, 0x1000/2);
m_cart_dram = auto_alloc_array_clear(machine(), UINT32, 0x400000/4);
m_backupram = auto_alloc_array_clear(machine(), UINT8, 0x8000);
m_cart_backupram = auto_alloc_array_clear(machine(), UINT8, 0x400000);
}
DRIVER_INIT_MEMBER(saturn_state,saturnus)

3
src/mame/includes/stv.h
View File

@ -47,8 +47,11 @@ public:
UINT32 ist;
UINT32 ism;
UINT32 illegal_factor[3];
UINT32 status;
}m_scu;
void scu_reset(void);
int m_minit_boost;
int m_sinit_boost;
attotime m_minit_boost_timeslice;