/**************************************************************************** drivers/sgi_ip6.c SGI 4D/PI IP6 family skeleton driver by Harmony 0x1fc00000 - 0x1fc3ffff ROM Interrupts: R2000: NYI ****************************************************************************/ #include "emu.h" #include "cpu/mips/r3000.h" struct ip6_regs_t { UINT16 unknown_half_0; UINT8 unknown_byte_0; UINT8 unknown_byte_1; }; class sgi_ip6_state : public driver_device { public: sgi_ip6_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag) , m_maincpu(*this, "maincpu") { } ip6_regs_t m_ip6_regs; DECLARE_READ32_MEMBER(ip6_unk1_r); DECLARE_WRITE32_MEMBER(ip6_unk1_w); DECLARE_READ32_MEMBER(ip6_unk2_r); DECLARE_WRITE32_MEMBER(ip6_unk2_w); DECLARE_READ32_MEMBER(ip6_unk3_r); DECLARE_WRITE32_MEMBER(ip6_unk3_w); DECLARE_DRIVER_INIT(sgi_ip6); virtual void machine_start(); virtual void machine_reset(); virtual void video_start(); UINT32 screen_update_sgi_ip6(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect); INTERRUPT_GEN_MEMBER(sgi_ip6_vbl); inline void ATTR_PRINTF(3,4) verboselog( int n_level, const char *s_fmt, ... ); required_device m_maincpu; }; #define VERBOSE_LEVEL ( 0 ) #define ENABLE_VERBOSE_LOG (1) inline void ATTR_PRINTF(3,4) sgi_ip6_state::verboselog( int n_level, const char *s_fmt, ... ) { #if ENABLE_VERBOSE_LOG if( VERBOSE_LEVEL >= n_level ) { va_list v; char buf[ 32768 ]; va_start( v, s_fmt ); vsprintf( buf, s_fmt, v ); va_end( v ); logerror("%08x: %s", machine().device("maincpu")->safe_pc(), buf); } #endif } /*************************************************************************** VIDEO HARDWARE ***************************************************************************/ void sgi_ip6_state::video_start() { } UINT32 sgi_ip6_state::screen_update_sgi_ip6(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect) { return 0; } /*************************************************************************** MACHINE FUNCTIONS ***************************************************************************/ READ32_MEMBER(sgi_ip6_state::ip6_unk1_r) { UINT32 ret = 0; switch(offset) { case 0x0000/4: if(ACCESSING_BITS_16_31) { verboselog(0, "ip6_unk1_r: Unknown address: %08x & %08x\n", 0x1f880000 + (offset << 2), mem_mask ); } if(ACCESSING_BITS_0_15) { verboselog(0, "ip6_unk1_r: Unknown Halfword 0: %08x & %08x\n", m_ip6_regs.unknown_half_0, mem_mask ); ret |= m_ip6_regs.unknown_half_0; } break; default: verboselog(0, "ip6_unk1_r: Unknown address: %08x & %08x\n", 0x1f880000 + (offset << 2), mem_mask ); break; } return ret; } WRITE32_MEMBER(sgi_ip6_state::ip6_unk1_w) { switch(offset) { case 0x0000/4: if(ACCESSING_BITS_16_31) { verboselog(0, "ip6_unk1_w: Unknown address: %08x = %08x & %08x\n", 0x1f880000 + (offset << 2), data, mem_mask ); } if(ACCESSING_BITS_0_15) { verboselog(0, "ip6_unk1_w: Unknown Halfword 0 = %04x & %04x\n", data & 0x0000ffff, mem_mask & 0x0000ffff ); m_ip6_regs.unknown_half_0 = data & 0x0000ffff; } break; default: verboselog(0, "ip6_unk1_w: Unknown address: %08x = %08x & %08x\n", 0x1f880000 + (offset << 2), data, mem_mask ); break; } } READ32_MEMBER(sgi_ip6_state::ip6_unk2_r) { UINT32 ret = 0; switch(offset) { case 0x0000/4: if(!ACCESSING_BITS_24_31) { verboselog(0, "ip6_unk2_r: Unknown address: %08x & %08x\n", 0x1f880000 + (offset << 2), mem_mask ); } if(ACCESSING_BITS_24_31) { verboselog(0, "ip6_unk2_r: Unknown Byte 0 = %02x & %02x\n", m_ip6_regs.unknown_byte_0, mem_mask >> 24 ); ret |= m_ip6_regs.unknown_byte_0 << 24; } break; default: verboselog(0, "ip6_unk2_r: Unknown address: %08x & %08x\n", 0x1f880000 + (offset << 2), mem_mask ); break; } return ret; } WRITE32_MEMBER(sgi_ip6_state::ip6_unk2_w) { switch(offset) { case 0x0000/4: if(!ACCESSING_BITS_24_31) { verboselog(0, "ip6_unk2_w: Unknown address: %08x = %08x & %08x\n", 0x1f880000 + (offset << 2), data, mem_mask ); } if(ACCESSING_BITS_24_31) { verboselog(0, "ip6_unk2_w: Unknown Byte 0 = %02x & %02x\n", data >> 24, mem_mask >> 24 ); m_ip6_regs.unknown_byte_0 = (data & 0xff000000) >> 24; } break; default: verboselog(0, "ip6_unk2_w: Unknown address: %08x = %08x & %08x\n", 0x1f880000 + (offset << 2), data, mem_mask ); break; } } READ32_MEMBER(sgi_ip6_state::ip6_unk3_r) { UINT32 ret = 0; if(ACCESSING_BITS_16_23) { verboselog(0, "ip6_unk3_r: Unknown Byte 1: %02x & %02x\n", m_ip6_regs.unknown_byte_1, (mem_mask >> 16) & 0x000000ff); ret |= m_ip6_regs.unknown_byte_1 << 16; } else { verboselog(0, "ip6_unk3_r: Unknown address: %08x & %08x\n", 0x1fb00000 + (offset << 2), mem_mask ); } return ret; } WRITE32_MEMBER(sgi_ip6_state::ip6_unk3_w) { verboselog(0, "ip6_unk3_w: Unknown address: %08x = %08x & %08x\n", 0x1fb00000 + (offset << 2), data, mem_mask ); } INTERRUPT_GEN_MEMBER(sgi_ip6_state::sgi_ip6_vbl) { } void sgi_ip6_state::machine_start() { } void sgi_ip6_state::machine_reset() { m_ip6_regs.unknown_byte_0 = 0x80; m_ip6_regs.unknown_byte_1 = 0x80; m_ip6_regs.unknown_half_0 = 0; } /*************************************************************************** ADDRESS MAPS ***************************************************************************/ static ADDRESS_MAP_START( sgi_ip6_map, AS_PROGRAM, 32, sgi_ip6_state ) AM_RANGE( 0x1f880000, 0x1f880003 ) AM_READWRITE(ip6_unk1_r, ip6_unk1_w) AM_RANGE( 0x1fb00000, 0x1fb00003 ) AM_READWRITE(ip6_unk3_r, ip6_unk3_w) AM_RANGE( 0x1fbc004c, 0x1fbc004f ) AM_READWRITE(ip6_unk2_r, ip6_unk2_w) AM_RANGE( 0x1fc00000, 0x1fc3ffff ) AM_ROM AM_REGION( "user1", 0 ) ADDRESS_MAP_END /*************************************************************************** MACHINE DRIVERS ***************************************************************************/ static MACHINE_CONFIG_START( sgi_ip6, sgi_ip6_state ) MCFG_CPU_ADD( "maincpu", R3041, 20000000 ) // FIXME: Should be R2000 MCFG_R3000_ENDIANNESS(ENDIANNESS_BIG) MCFG_CPU_CONFIG( config ) MCFG_CPU_PROGRAM_MAP( sgi_ip6_map ) MCFG_CPU_VBLANK_INT_DRIVER("screen", sgi_ip6_state, sgi_ip6_vbl) /* video hardware */ MCFG_SCREEN_ADD("screen", RASTER) MCFG_SCREEN_REFRESH_RATE( 60 ) MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) /* not accurate */ MCFG_SCREEN_SIZE(640, 480) MCFG_SCREEN_VISIBLE_AREA(0, 640-1, 0, 480-1) MCFG_SCREEN_UPDATE_DRIVER(sgi_ip6_state, screen_update_sgi_ip6) MACHINE_CONFIG_END static INPUT_PORTS_START( sgi_ip6 ) PORT_START("UNUSED") // unused IN0 PORT_BIT(0xffff, IP_ACTIVE_HIGH, IPT_UNUSED) INPUT_PORTS_END DRIVER_INIT_MEMBER(sgi_ip6_state,sgi_ip6) { } /*************************************************************************** ROM definition(s) ***************************************************************************/ ROM_START( sgi_ip6 ) ROM_REGION32_BE( 0x40000, "user1", 0 ) ROM_LOAD( "4d202031.bin", 0x000000, 0x040000, CRC(065a290a) SHA1(6f5738e79643f94901e6efe3612468d14177f65b) ) ROM_END /* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME */ COMP( 1988, sgi_ip6, 0, 0, sgi_ip6, sgi_ip6, sgi_ip6_state, sgi_ip6, "Silicon Graphics Inc", "4D/PI (R2000, 20MHz)", GAME_NOT_WORKING | GAME_NO_SOUND)