/* Space Bugger Game-A-Tron, 1981 TS 20060821: - there's really huge difference between both sets (code and data). weird - wrong colros, it looks like tehre's direct color mapping - bits from attribute ram connected to r/g/b outputs without use of color prom or color table - interrupt is generated by 8156 - very old combination chip containing 256*8 RAM (used as stack area), a timer and 8+8+6 ports. After game start all 8156 ports are set as inputs, timer is working in mode 3 - automatic reload. TC register is set to 0x7f. Timer input frequency is unknown. Output should be close to 1440 Hz. PCB Layout ---------- CPU 2.81 GAT |------------------------------------------------------| | 74LS393 | | 74LS00 TIP41A CN1| | | |-| 74LS32 74LS00 74LS161 | | | | 74LS10 CN2| | 74LS139 74LS240 | | |-----------| | | 74LS240 74LS244 | TMP8085 | 74LS04 | | |-----------|6MHz | | 74LS244 74LS373 74LS244 DSW(7) 74LS04 | | |-----------| | | uPB8216 uPB8216 | TMP8156 | | | |-----------| | | 2114 2114 74LS244 U32 | | | | 2114 2114 74LS32 U33 U20 | |-| | | 2114 2114 74LS138 U34 U21 | | | | 2114 2114 74LS138 U35 U22 | |------------------------------------------------------| Notes: All IC's shown. uPB8216 - NEC uPB8216 4 Bit Bi-directional Bus Driver 2114 - Hitachi HM572114P-4 1k x4 SRAM TMP8156 - RIOT, 256 bytes Static RAM with I/O Ports and Timer TMP8085 - 8085 CPU, clock 3MHz [6/2] CN1/2 - 10 pin connectors U20-U22 - Hitachi HM462716G 2k x8 EPROMs U32-U35 / Note, this PCB plugs into a motherboard containing connectors. There is also a sound and graphics board that plugs into the motherboard as well. However those PCBs are not available and are therefore not documented. Set 2: -------- Space Bugger Game-A-Tron 1981 U20 U21 U22 U32 U33 U34 U35 6MHz 8085 8156 2114 2114 2114 2114 2114 2114 2114 2114 Main ------- GFX 2114 2114 2114 2114 12.440MHz Graphics PCB ------- 76489 76489 Sound PCB ------- */ #include "emu.h" #include "cpu/i8085/i8085.h" #include "sound/sn76496.h" #include "includes/sbugger.h" //arbitrary #define NUM_INTS_FRAME 24 /* memory maps */ static ADDRESS_MAP_START( sbugger_map, AS_PROGRAM, 8 ) AM_RANGE(0x0000, 0x37ff) AM_ROM AM_RANGE(0xc800, 0xcbff) AM_RAM_WRITE(sbugger_videoram_attr_w) AM_BASE_MEMBER(sbugger_state,m_videoram_attr) AM_RANGE(0xcc00, 0xcfff) AM_RAM_WRITE(sbugger_videoram_w) AM_BASE_MEMBER(sbugger_state,m_videoram) AM_RANGE(0xe000, 0xe0ff) AM_RAM /* sp is set to e0ff */ AM_RANGE(0xf400, 0xffff) AM_RAM ADDRESS_MAP_END static ADDRESS_MAP_START( sbugger_io_map, AS_IO, 8 ) AM_RANGE(0xe0, 0xe0) AM_WRITENOP // 8156 command/status reg (write c0 = command START = (start of timer) AM_RANGE(0xe1, 0xe1) AM_READ_PORT("INPUTS") // 8156 PA AM_RANGE(0xe2, 0xe2) AM_READ_PORT("DSW1") // 8156 PB AM_RANGE(0xe3, 0xe3) AM_READ_PORT("DSW2") // 8156 PC = 6 bit ! //2 bits tested af f4c6 AM_RANGE(0xe4, 0xe4) AM_WRITENOP // 8156 timer reg1 (write 7f = CNT length) AM_RANGE(0xe5, 0xe5) AM_WRITENOP // 8156 timer reg2 (write c0 = timer mode - automatic reload, i.e. single pulse every time TC is reached) AM_RANGE(0xe8, 0xe8) AM_DEVWRITE("sn76489.1", sn76496_w) AM_RANGE(0xe9, 0xe9) AM_DEVWRITE("sn76489.2", sn76496_w) ADDRESS_MAP_END /* gfx decode */ static const gfx_layout char16layout = { 8,16, RGN_FRAC(1,1), 1, { 0 }, { 0, 1, 2, 3, 4, 5, 6, 7 }, { 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8, 8*8, 9*8, 10*8, 11*8, 12*8, 13*8, 14*8, 15*8 }, 16*8 }; static GFXDECODE_START( sbugger ) GFXDECODE_ENTRY( "gfx1", 0, char16layout, 0, 1 ) GFXDECODE_END /* input ports */ static INPUT_PORTS_START( sbugger ) PORT_START("INPUTS") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_2WAY PORT_DIPNAME( 0x02, 0x02, "PA 1" ) PORT_DIPSETTING( 0x02, DEF_STR( Off ) ) PORT_DIPSETTING( 0x00, DEF_STR( On ) ) PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_2WAY PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_START2 ) PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_START1 ) PORT_DIPNAME( 0x80, 0x80, "PA 7" ) PORT_DIPSETTING( 0x80, DEF_STR( Off ) ) PORT_DIPSETTING( 0x00, DEF_STR( On ) ) PORT_START("DSW1") PORT_DIPNAME( 0x01, 0x01, "PB 0" ) PORT_DIPSETTING( 0x01, DEF_STR( Off ) ) PORT_DIPSETTING( 0x00, DEF_STR( On ) ) PORT_DIPNAME( 0x02, 0x02, "PB 1" ) PORT_DIPSETTING( 0x02, DEF_STR( Off ) ) PORT_DIPSETTING( 0x00, DEF_STR( On ) ) PORT_DIPNAME( 0x04, 0x04, "PB 2" ) PORT_DIPSETTING( 0x04, DEF_STR( Off ) ) PORT_DIPSETTING( 0x00, DEF_STR( On ) ) PORT_DIPNAME( 0x08, 0x08, "PB 3" ) PORT_DIPSETTING( 0x08, DEF_STR( Off ) ) PORT_DIPSETTING( 0x00, DEF_STR( On ) ) PORT_DIPNAME( 0x10, 0x10, "PB 4" ) PORT_DIPSETTING( 0x10, DEF_STR( Off ) ) PORT_DIPSETTING( 0x00, DEF_STR( On ) ) PORT_DIPNAME( 0x20, 0x20, "PB 5" ) PORT_DIPSETTING( 0x20, DEF_STR( Off ) ) PORT_DIPSETTING( 0x00, DEF_STR( On ) ) PORT_DIPNAME( 0x40, 0x40, "PB 6" ) PORT_DIPSETTING( 0x40, DEF_STR( Off ) ) PORT_DIPSETTING( 0x00, DEF_STR( On ) ) PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_COIN1 ) PORT_START("DSW2") PORT_DIPNAME( 0x03, 0x01, DEF_STR( Difficulty ) ) //enemy speed PORT_DIPSETTING( 0x00, DEF_STR( Easy ) ) PORT_DIPSETTING( 0x01, DEF_STR( Normal ) ) PORT_DIPSETTING( 0x02, DEF_STR( Hard ) ) PORT_DIPSETTING( 0x03, DEF_STR( Hardest ) ) PORT_DIPNAME( 0x04, 0x04, DEF_STR( Allow_Continue ) ) PORT_DIPSETTING( 0x00, DEF_STR( No ) ) PORT_DIPSETTING( 0x04, DEF_STR( Yes ) ) PORT_DIPNAME( 0x08, 0x08, DEF_STR( Unknown ) ) //bonus stage related (code at $f94 & $df8) PORT_DIPSETTING( 0x08, DEF_STR( Off ) ) PORT_DIPSETTING( 0x00, DEF_STR( On ) ) PORT_DIPNAME( 0x10, 0x10, DEF_STR( Unknown ) ) PORT_DIPSETTING( 0x10, DEF_STR( Off ) ) PORT_DIPSETTING( 0x00, DEF_STR( On ) ) PORT_DIPNAME( 0x20, 0x20, DEF_STR( Unknown ) ) PORT_DIPSETTING( 0x20, DEF_STR( Off ) ) PORT_DIPSETTING( 0x00, DEF_STR( On ) ) PORT_BIT( 0xc0, IP_ACTIVE_HIGH, IPT_UNUSED ) INPUT_PORTS_END /* machine driver */ static MACHINE_CONFIG_START( sbugger, sbugger_state ) MCFG_CPU_ADD("maincpu", I8085A, 6000000) /* 3.00 MHz??? */ MCFG_CPU_PROGRAM_MAP(sbugger_map) MCFG_CPU_IO_MAP(sbugger_io_map) MCFG_CPU_PERIODIC_INT(irq3_line_hold,NUM_INTS_FRAME*60) MCFG_GFXDECODE(sbugger) MCFG_SCREEN_ADD("screen", RASTER) MCFG_SCREEN_REFRESH_RATE(60) MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(0)) MCFG_SCREEN_FORMAT(BITMAP_FORMAT_INDEXED16) MCFG_SCREEN_SIZE(64*8, 32*8) MCFG_SCREEN_VISIBLE_AREA(0*8, 64*8-1, 0*8, 32*8-1) MCFG_SCREEN_UPDATE(sbugger) MCFG_PALETTE_LENGTH(512) MCFG_PALETTE_INIT(sbugger) MCFG_VIDEO_START(sbugger) /* sound hardware */ MCFG_SPEAKER_STANDARD_MONO("mono") MCFG_SOUND_ADD("sn76489.1", SN76489, 3000000) MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0) MCFG_SOUND_ADD("sn76489.2", SN76489, 3000000) MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0) MACHINE_CONFIG_END /* rom loading */ ROM_START( sbugger ) ROM_REGION( 0x10000, "maincpu", 0 ) /* 8085 Code */ ROM_LOAD( "spbugger.u35", 0x0000, 0x0800, CRC(7c2000a1) SHA1(01a60745ea8e9a70de37d1a785fad1d17eafc812) ) // seems to map at 0 ROM_LOAD( "spbugger.u22", 0x0800, 0x0800, BAD_DUMP CRC(66e00c53) SHA1(49ca567a98978308306cdb8455c61c022668693b) ) // FIXED BITS (xxxx1111) it jumps here .... bad rom? ROM_LOAD( "spbugger.u34", 0x1000, 0x0800, CRC(db357dde) SHA1(363392b971f48e9d99f4167aa17f0c885b0865ee) ) // seems to map at 1000 ROM_LOAD( "spbugger.u21", 0x1800, 0x0800, CRC(618a5b2a) SHA1(aa7a40b1944f09c396f675d7dd3a8c3c35bf01f1) ) // seems to map at 1800 ROM_LOAD( "spbugger.u20", 0x2000, 0x0800, CRC(8957563c) SHA1(b33a75fcf375d2a1a766105f87dd8e4d42db3d76) ) // seems to map at 2000 ROM_LOAD( "spbugger.u33", 0x2800, 0x0800, CRC(f6cb1399) SHA1(53cb67e29a238c5ac20c6be9423d850e004212c1) ) // seems to map at 2800 ROM_LOAD( "spbugger.u32", 0x3000, 0x0800, CRC(f49af2b3) SHA1(1519ee4786b78546767827d3a9508e7ddb646765) ) // seems to map at 3000 ROM_REGION( 0x1000, "gfx1", 0 ) /* GFX */ ROM_LOAD( "spbugger.gfx", 0x0000, 0x1000, CRC(d3f345b5) SHA1(a5082ffc3043352e9b731af95770bdd62fb928bf) ) ROM_END ROM_START( sbuggera ) ROM_REGION( 0x10000, "maincpu", 0 ) /* 8085 Code */ ROM_LOAD( "bug_g10.u35", 0x0000, 0x0800, CRC(60a3044d) SHA1(5b2be551a84e4a7a35637208a19b3477629f20d9) ) ROM_LOAD( "bug_c10.u22", 0x0800, 0x0800, CRC(34a829f7) SHA1(135ec2739879c2e47f3c6d4a5196c865b5940a84) ) ROM_LOAD( "bug_f10.u34", 0x1000, 0x0800, CRC(e2f7a51c) SHA1(ee221f6697021d14838fd6c4aff41678ce62e4ba) ) ROM_LOAD( "bug_b10.u21", 0x1800, 0x0800, CRC(3c9a467a) SHA1(be64fddc294be38ff4f997e6666aaea15ed7d0e9) ) ROM_LOAD( "bug_a10.u20", 0x2000, 0x0800, CRC(f6f58aba) SHA1(95bf03b8876ff36f52d93f5f5f9b38021c8b7979) ) ROM_LOAD( "bug_e10.u33", 0x2800, 0x0800, CRC(fefd9c5e) SHA1(1b0bbf462231c32014d45ec21b105a669665d90d) ) ROM_LOAD( "bug_d10.u32", 0x3000, 0x0800, BAD_DUMP CRC(c807742f) SHA1(cb5c44ffd6dd184c6a0722003ff6674caf865bee) ) // missing in this set ROM_REGION( 0x4000, "gfx1", 0 ) /* GFX */ ROM_LOAD( "spbugger.gfx", 0x0000, 0x1000, CRC(d3f345b5) SHA1(a5082ffc3043352e9b731af95770bdd62fb928bf) ) ROM_END GAME( 1981, sbugger, 0, sbugger, sbugger, 0, ROT270, "Game-A-Tron", "Space Bugger (set 1)", GAME_NOT_WORKING ) GAME( 1981, sbuggera, sbugger, sbugger, sbugger, 0, ROT270, "Game-A-Tron", "Space Bugger (set 2)", GAME_IMPERFECT_COLORS )