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Experimental fixes for Bug!

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This commit is contained in:
Angelo Salese 2013-02-12 00:18:28 +00:00
parent 6aa5f235f7
commit 31a88e0ec2
3 changed files with 16 additions and 4 deletions
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6
src/emu/video/stvvdp2.c
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@ -4576,7 +4576,8 @@ void saturn_state::stv_vdp2_check_tilemap(bitmap_rgb32 &bitmap, const rectangle
/* Langrisser III bit 3 normal, bit 1 during battle field */
/* Metal Slug bit 0 during gameplay */
if(STV_VDP2_SFSEL & ~0xb)
/* Bug! Sega Away Logo onward 0x470 */
if(STV_VDP2_SFSEL & ~0x47b)
popmessage("Special Function Code Select enable %04x %04x, contact MAMEdev",STV_VDP2_SFSEL,STV_VDP2_SFCODE);
/* Albert Odyssey Gaiden 0x0001 */
@ -4607,7 +4608,8 @@ void saturn_state::stv_vdp2_check_tilemap(bitmap_rgb32 &bitmap, const rectangle
/* Find Love 0x4400 */
/* Dragon Ball Z 0x3800 - 0x2c00 */
/* Assault Suit Leynos 2 0x0200*/
if(STV_VDP2_SFPRMD & ~0x7f75)
/* Bug! 0x8800 */
if(STV_VDP2_SFPRMD & ~0xff75)
popmessage("Special Priority Mode enabled %04x, contact MAMEdev",STV_VDP2_SFPRMD);
}
}

13
src/mame/drivers/saturn.c
View file

@ -301,8 +301,10 @@ READ32_MEMBER(saturn_state::saturn_scu_r)
res = m_scu.ism;
break;
case 0xa4/4:
if(LOG_SCU && !space.debugger_access()) logerror("(PC=%08x) IRQ status reg read %08x MASK=%08x\n",space.device().safe_pc(),mem_mask,m_scu_regs[0xa0/4]);
res = m_scu.ist;
if(LOG_SCU && !space.debugger_access()) logerror("(PC=%08x) IRQ status reg read MASK=%08x IST=%08x | ISM=%08x\n",space.device().safe_pc(),mem_mask,m_scu.ist,m_scu.ism);
/* TODO: Bug! trips an HW fault. Basically, it tries to read the IST bit 1 with that irq enabled. */
res = m_scu.ist | ~m_scu.ism;
// res = m_scu.ist;
break;
case 0xc8/4:
if(LOG_SCU && !space.debugger_access()) logerror("(PC=%08x) SCU version reg read\n",space.device().safe_pc());
@ -769,6 +771,12 @@ READ8_MEMBER(saturn_state::saturn_cart_type_r)
return cart_ram_header[m_cart_type];
}
/* TODO: Bug! accesses this one, if returning 0 the SH-2 hard-crashes. Might be an actual bug with the CD block. */
READ32_HANDLER( saturn_state::abus_dummy_r )
{
return -1;
}
static ADDRESS_MAP_START( saturn_mem, AS_PROGRAM, 32, saturn_state )
AM_RANGE(0x00000000, 0x0007ffff) AM_ROM AM_SHARE("share6") // bios
AM_RANGE(0x00100000, 0x0010007f) AM_READWRITE8(saturn_SMPC_r, saturn_SMPC_w,0xffffffff)
@ -780,6 +788,7 @@ static ADDRESS_MAP_START( saturn_mem, AS_PROGRAM, 32, saturn_state )
// AM_RANGE(0x02400000, 0x027fffff) AM_RAM //cart RAM area, dynamically allocated
// AM_RANGE(0x04000000, 0x047fffff) AM_RAM //backup RAM area, dynamically allocated
AM_RANGE(0x04fffffc, 0x04ffffff) AM_READ8(saturn_cart_type_r,0x000000ff)
AM_RANGE(0x05000000, 0x057fffff) AM_READ(abus_dummy_r)
AM_RANGE(0x05800000, 0x0589ffff) AM_READWRITE(stvcd_r, stvcd_w)
/* Sound */
AM_RANGE(0x05a00000, 0x05a7ffff) AM_READWRITE16(saturn_soundram_r, saturn_soundram_w,0xffffffff)

1
src/mame/includes/stv.h
View file

@ -272,6 +272,7 @@ public:
DECLARE_WRITE32_MEMBER ( saturn_vdp2_cram_w );
DECLARE_WRITE16_MEMBER ( saturn_vdp2_regs_w );
DECLARE_READ32_MEMBER( abus_dummy_r );
/* VDP1 */
void stv_set_framebuffer_config( void );