// license:BSD-3-Clause // copyright-holders:Ernesto Corvi, Roberto Fresca /****************************************************************************************************** Truco-Tron - (c) 198? Playtronic SRL, Argentina. Written by Ernesto Corvi Additional work by Roberto Fresca. Notes: - The board uses a battery backed ram for protection, mapped at $7c00-$7fff. - If the battery backup data is corrupt, it comes up with some sort of code entry screen. As far as I can tell, you can't do anything with it. - Replacing the battery backed ram with an eeprom is not really an option since the game stores the current credits count in the battery backed ram. - System clock is 12 Mhz. The CPU clock is unknown. - The Alternate GFX mode is funky. Not only it has different bitmaps, but also the strings with the game options are truncated. Title is also truncated. - At least one bootleg board exist. ******************************************************************************************************* Mini-board (6"x 7") silkscreened 8901 REV.C JAMMA connector. 1x Xtal 12 MHz. 1x 3.6V. Lithium Battery (QTC85). 2 rows of 6 holes for jumpers (JP1, JP2). No DIP switches banks. All IC's are scratched to avoid the identification. PCB layout: .--------------------------------------------------. |S T .---. .---. .---. .-. .-. .---. .-. | |E R | | | U | | U | |U| |U| | U | |U| | |R U | | | 2 | | 3 | |1| |5| | 1 | |1| | |I C | U | | | | | |5| | | | 0 | |4| | |E O | 1 | | | | | '-' '-' | | '-' | | | | '---' '---' .-. '---' .-. | |0 T | | |U| .-------. |U| | |0 R | | |1| |BATTERY| |1| | |0 O | | |2| | - + | |9| | |0 N '---' '-' '-------' '-' | | .-. .-, .---. .-. .---. .-. .-. .-. | | |U| |U| | | |U| | | |U| |U| |U| | | |1| |1| | | |1| | | |6| |7| |1| | | |7| |8| | U | |6| | U | | | | | |3| P| | '-' '-' | 4 | '-' | 9 | '-' '-' | | L| | .----. | | | | .-. .-. '-' A| | |Xtal| | | | | |U| |U| Y| | '----' | | | | |1| |8| T| | .-. | | | | |1| | | R| | |U| '---' '---' '-' '-' O| | |2|.---. N| | |0||pot| I| | '-''---' JAMMA C| '----+++++++++++++++++++++++++++++-----------------' ||||||||||||||||||||||||||||| '---------------------------' IC's Reverse Engineering.... MARKED PINS ID TYPE PART DETAILS - U1 : 40-pin IC YES CPU MOTOROLA M6809EP 8-bit microprocessor. - U2 : 28-pin IC YES ROM M27128A (or M27512FI) NMOS 128K 16K x 8 UV EPROM (or 64K x 8). - U3 : 28-pin IC YES ROM M27128A (or M27512FI) NMOS 128K 16K x 8 UV EPROM (or 64K x 8). - U4 : 40-pin IC YES I/O ST EF6821P PIA: Peripheral Interface Adapter. - U5 : 16-pin IC YES TTL ST M74HC157B1 Quad 2 Channel Multiplexer. - U6 : 16-pin IC YES TTL ST M74HC157B1 Quad 2 Channel Multiplexer. - U7 : 16-pin IC YES TTL ST M74HC157B1 Quad 2 Channel Multiplexer. - U8 : 16-pin IC YES TTL ST M74HC157B1 Quad 2 Channel Multiplexer. - U9 : 40-pin IC YES CRTC HD6845 / UM6845 / GS GM68A45S CRT Controller. - U10: 28-pin IC YES RAM KM62256BLP-10 32K x 8 Low Power CMOS Static RAM. - U11: 14-pin IC YES TTL SN74LS95BN 4-bit Parallel-Access Shift Registers. - U12: 14-pin IC YES TTL SN74LS95BN 4-bit Parallel-Access Shift Registers. - U13: 20-pin IC YES TTL SN74LS244N Octal Buffers and Line Drivers with 3-State output. - U14: 20-pin IC YES TTL HD74LS374 Octal D-type Flip-Flops with noninverted 3-state output. - U15: 20-pin IC YES PLD PALCE16V8H-25 EE CMOS Zero-Power 20-Pin Universal Programmable Array Logic. - U16: 20-pin IC YES PLD PALCE16V8H-25 EE CMOS Zero-Power 20-Pin Universal Programmable Array Logic. - U17: 14-pin IC YES TTL HD74LS00P Quadruple 2-Input NAND Gates. - U18: 14-pin IC YES TTL KS74HCTLS86N Quad 2???Input Exclusive OR Gate. - U19: 16-pin IC YES WATCHDOG MAXIM MAX691 Microprocessor Supervisory Circuits. - U20: 16-pin IC YES DARLINGTON ULN2003 7 NPN Darlington transistor pairs with high voltage and current capability. M6809 +---\/---+ GND 1| |40 !HALT <-- --> !NMI 2| |39 ETAL <-- PIA /IRQA & B --> !IRQ 3| |38 EXTAL <-- --> !FIRQ 4| |37 !RES <-- PIA /RES & U19(15) MAX691 <-- BS 5| |36 MRDY <-- <-- BA 6| |35 Q <-- Vcc 7| U1 |34 E <-- PIA E (25) PIA /RS0 (36) <-- A0 8| |33 !DMA <-- PIA /RS1 (35) <-- A1 9|Motorola|32 R/!W --> PIA R/W (21) <-- A2 10| 6809 |31 D0 <-> PIA D0 (33) <-- A3 11| |30 D1 <-> PIA D1 (32) <-- A4 12| |29 D2 <-> PIA D2 (31) <-- A5 13| |28 D3 <-> PIA D3 (30) <-- A6 14| |27 D4 <-> PIA D4 (29) <-- A7 15| |26 D5 <-> PIA D5 (28) <-- A8 16| |25 D6 <-> PIA D6 (27) <-- A9 17| |24 D7 <-> PIA D7 (26) <-- A10 18| |23 A15 --> <-- A11 19| |22 A14 --> <-- A12 20| |21 A13 --> +--------+ PIA 6821 +----\/----+ VSS |01 40| CA1 --- PIA CB1 (*) JAMMA S17 (2P_ST) - PA0 |02 39| CA2 --- U19(11). Watchdog/RESET JAMMA S14 (SRVSW) - PA1 |03 38| /IRQA - CPU M6809 !IRQ (03) JAMMA C26 (2P_SL) - PA2 |04 37| /IRQB - CPU M6809 !IRQ (03) JAMMA S16 (COIN2) - PA3 |05 U4 36| /RS0 -- CPU M6809 A0 (08) JAMMA S15 (TLTSW) - PA4 |06 35| /RS1 -- CPU M6809 A1 (09) JAMMA C22 (P1_B1) - PA5 |07 34| /RES -- CPU M6809 !RES (37) & U19(15) MAX691 JAMMA C18/21(U-R) - PA6 |08 33| D0 ---- CPU M6809 D0 (31) JAMMA C19/20(D-L) - PA7 |09 32| D1 ---- CPU M6809 D1 (30) JP2(4) - PB0 |10 31| D2 ---- CPU M6809 D2 (29) JP2(2) - PB1 |11 30| D3 ---- CPU M6809 D3 (28) U20(04) - PB2 |12 29| D4 ---- CPU M6809 D4 (27) U20(05) - PB3 |13 28| D5 ---- CPU M6809 D5 (26) JP1(6) - PB4 |14 27| D6 ---- CPU M6809 D6 (25) JP1(4) - PB5 |15 26| D7 ---- CPU M6809 D7 (24) JP1(2) - PB6 |16 25| E ----- CPU M6809 E (34) U20(07) - PB7 |17 24| CS1 PIA CA1 (*) - CB1 |18 23| /CS2 U20(06) - CB2 |19 22| CS0 VCC |20 21| R/W +----------+ (*) Lines CA1 and CB1 are tied together, being both IN. They are connected to JAMMA C16 (COIN1). U19: *** MAX691 *** Maxim MAX691 Microprocessor Supervisory Circuit. (for battery backup power switching and watchdog). leg 01 [VBATT] ----> leg 02 [VOUT] -----> leg 03 [VCC] ------> VCC leg 04 [GND] ------> GND leg 05 [BATT ON] --> leg 06 [/LOWLINE] -> leg 07 [OSC IN] ---> N/C \ Set 1.6 seconds as WD timeout. leg 08 [OSC SEL] --> N/C / leg 09 [PFI] ------> leg 10 [/PFO] -----> leg 11 [WDI] ------> PIA CA2 leg 12 [/CE OUT] --> leg 13 [/CE IN] ---> GND leg 14 [/WDO] -----> leg 15 [/RESET] ---> CPU /RES (37) leg 16 [RESET] ----> U20: *** ULN2003 *** leg 01 --> N/C leg 02 --> N/C leg 03 --> N/C leg 04 --> PIA PB2 (12) leg 05 --> PIA PB3 (13) leg 06 --> PIA CB2 (19) leg 07 --> PIA PB7 (17) leg 08 --> GND leg 09 --> VCC leg 10 --> CAP --> JAMMA(S10) +Speaker leg 11 --> JAMMA(S26) leg 12 --> JAMMA(C08) Coin Counter 1 leg 13 --> JAMMA(S08) Coin Counter 2 leg 14 --> N/C leg 15 --> N/C leg 16 --> N/C JP1: 01 --> GND 02 --> PIA PB6 (16) & R5(1K) --> VCC 03 --> GND 04 --> PIA PB5 (15) & R7(1K) --> VCC 05 --> GND 06 --> PIA PB4 (14) & R8(1K) --> VCC JP2: 01 --> GND 02 --> PIA PB1 (11) & R9(1K) --> VCC 03 --> GND 04 --> PIA PB0 (10) & R10(1K) -> VCC 05 --> GND 06 --> Seems N/C *******************************************************************************************************/ #include "emu.h" #include "includes/truco.h" #include "cpu/m6809/m6809.h" #include "machine/6821pia.h" #include "sound/volt_reg.h" #include "video/mc6845.h" #include "screen.h" #include "speaker.h" #define MASTER_CLOCK XTAL(12'000'000) /* confirmed */ #define CPU_CLOCK (MASTER_CLOCK/16) /* guess */ #define CRTC_CLOCK (MASTER_CLOCK/8) /* guess */ /******************************************* * Read/Write Handlers * *******************************************/ WRITE8_MEMBER(truco_state::porta_w) { logerror("Port A writes: %2x\n", data); } WRITE_LINE_MEMBER(truco_state::pia_ca2_w) { /* PIA CA2 line is connected to IC U19, leg 11. The IC was successfully identified as MAX691. The leg 11 is WDI... The code toggles 0's & 1's on this line. Legs 07 [OSC IN] and 08 [OSC SEL] aren't connected, setting 1.6 seconds as WD timeout. */ m_watchdog->watchdog_reset(); } WRITE8_MEMBER(truco_state::portb_w) { m_dac->write(BIT(data, 7)); /* Isolated the bit for Delta-Sigma DAC */ if (data & 0x7f) logerror("Port B writes: %2x\n", data); } WRITE_LINE_MEMBER(truco_state::pia_irqa_w) { logerror("PIA irq A: %2x\n", state); } WRITE_LINE_MEMBER(truco_state::pia_irqb_w) { logerror("PIA irq B: %2x\n", state); } /******************************************* * Memory Map * *******************************************/ void truco_state::main_map(address_map &map) { map(0x0000, 0x17ff).ram(); /* General purpose RAM */ map(0x1800, 0x7bff).ram().share("videoram"); /* Video RAM */ map(0x7c00, 0x7fff).ram().share("battery_ram"); /* Battery backed RAM */ map(0x8000, 0x8003).rw("pia0", FUNC(pia6821_device::read), FUNC(pia6821_device::write)); map(0x8004, 0x8004).w("crtc", FUNC(mc6845_device::address_w)); map(0x8005, 0x8005).rw("crtc", FUNC(mc6845_device::register_r), FUNC(mc6845_device::register_w)); map(0x8008, 0xffff).rom(); } /* CRTC: 00: 5f 01: 40 02: 4d 03: 06 04: 0f 05: 04 06: 0c 07: 0e 08: 00 09: 0f 0a: 00 0b: 00 0c: 00 0d: c0 */ /******************************************* * Input Ports Definition * *******************************************/ static INPUT_PORTS_START( truco ) PORT_START("P1") /* IN0 */ PORT_DIPNAME( 0x01, 0x01, "IN0-1 (P2 START)" ) PORT_DIPSETTING ( 0x01, DEF_STR( Off ) ) PORT_DIPSETTING ( 0x00, DEF_STR( On ) ) PORT_DIPNAME( 0x02, 0x02, "IN0-2 (SERVICE SW)" ) PORT_DIPSETTING ( 0x02, DEF_STR( Off ) ) PORT_DIPSETTING ( 0x00, DEF_STR( On ) ) PORT_DIPNAME( 0x04, 0x04, "IN0-3 (P2 SELECT)" ) PORT_DIPSETTING ( 0x04, DEF_STR( Off ) ) PORT_DIPSETTING ( 0x00, DEF_STR( On ) ) PORT_DIPNAME( 0x08, 0x08, "IN0-4 (COIN2)" ) PORT_DIPSETTING ( 0x08, DEF_STR( Off ) ) PORT_DIPSETTING ( 0x00, DEF_STR( On ) ) PORT_DIPNAME( 0x10, 0x10, "IN0-5 (TILT SW)" ) PORT_DIPSETTING ( 0x10, DEF_STR( Off ) ) PORT_DIPSETTING ( 0x00, DEF_STR( On ) ) // PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_UNKNOWN ) /* Connected to JAMMA S17 (P2 START) */ // PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_UNKNOWN ) /* Connected to JAMMA S14 (SERVICE SW) */ // PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_UNKNOWN ) /* Connected to JAMMA C26 (P2 SELECT) */ // PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_UNKNOWN ) /* Connected to JAMMA S16 (COIN2) */ // PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNKNOWN ) /* Connected to JAMMA S15 (TILT SW) */ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON1 ) /* Connected to JAMMA C22 (P1 BUTTON1) */ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) /* Connected to JAMMA C18/21 (JOY UP & JOY RIGHT) */ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) /* Connected to JAMMA C19/20 (JOY DOWN & JOY LEFT) */ PORT_START("JMPRS") /* JP1-2 */ PORT_DIPNAME( 0x01, 0x01, DEF_STR( Unknown ) ) PORT_DIPSETTING ( 0x01, DEF_STR( Off ) ) PORT_DIPSETTING ( 0x00, DEF_STR( On ) ) PORT_DIPNAME( 0x02, 0x02, "Alt. Graphics" ) PORT_DIPSETTING ( 0x02, DEF_STR( Off ) ) PORT_DIPSETTING ( 0x00, DEF_STR( On ) ) PORT_DIPNAME( 0x04, 0x04, DEF_STR( Unknown ) ) PORT_DIPSETTING ( 0x04, DEF_STR( Off ) ) PORT_DIPSETTING ( 0x00, DEF_STR( On ) ) PORT_DIPNAME( 0x08, 0x08, DEF_STR( Unknown ) ) 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_DIPNAME( 0x40, 0x40, DEF_STR( Unknown ) ) PORT_DIPSETTING ( 0x40, DEF_STR( Off ) ) PORT_DIPSETTING ( 0x00, DEF_STR( On ) ) PORT_DIPNAME( 0x80, 0x80, DEF_STR( Unknown ) ) PORT_DIPSETTING ( 0x80, DEF_STR( Off ) ) PORT_DIPSETTING ( 0x00, DEF_STR( On ) ) PORT_START("COIN") /* IN1 - FAKE - Used for coinup */ PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_COIN1 ) PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_UNKNOWN ) PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_UNKNOWN ) PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_UNKNOWN ) PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNKNOWN ) PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNKNOWN ) PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNKNOWN ) PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN ) INPUT_PORTS_END void truco_state::machine_start() { save_item(NAME(m_trigger)); } /******************************************* * Machine Reset & Interrupts * *******************************************/ void truco_state::machine_reset() { int a; /* Setup the data on the battery backed RAM */ /* IRQ check */ m_battery_ram[0x002] = 0x51; m_battery_ram[0x024] = 0x49; m_battery_ram[0x089] = 0x04; m_battery_ram[0x170] = 0x12; m_battery_ram[0x1a8] = 0xd5; /* Mainloop check */ m_battery_ram[0x005] = 0x04; m_battery_ram[0x22B] = 0x46; m_battery_ram[0x236] = 0xfb; m_battery_ram[0x2fe] = 0x1D; m_battery_ram[0x359] = 0x5A; /* Boot check */ a = ( m_battery_ram[0x000] << 8 ) | m_battery_ram[0x001]; a += 0x4d2; m_battery_ram[0x01d] = ( a >> 8 ) & 0xff; m_battery_ram[0x01e] = a & 0xff; m_battery_ram[0x020] = m_battery_ram[0x011]; } INTERRUPT_GEN_MEMBER(truco_state::interrupt) { /* coinup */ if ( ioport("COIN")->read() & 1 ) { if ( m_trigger == 0 ) { device.execute().set_input_line(M6809_IRQ_LINE, HOLD_LINE); m_trigger++; } } else m_trigger = 0; } /******************************************* * Machine Driver * *******************************************/ void truco_state::truco(machine_config &config) { /* basic machine hardware */ M6809(config, m_maincpu, CPU_CLOCK); m_maincpu->set_addrmap(AS_PROGRAM, &truco_state::main_map); m_maincpu->set_vblank_int("screen", FUNC(truco_state::interrupt)); WATCHDOG_TIMER(config, m_watchdog).set_time(attotime::from_msec(1600)); /* 1.6 seconds */ pia6821_device &pia(PIA6821(config, "pia0", 0)); pia.readpa_handler().set_ioport("P1"); pia.readpb_handler().set_ioport("JMPRS"); pia.writepa_handler().set(FUNC(truco_state::porta_w)); pia.writepb_handler().set(FUNC(truco_state::portb_w)); pia.ca2_handler().set(FUNC(truco_state::pia_ca2_w)); pia.irqa_handler().set(FUNC(truco_state::pia_irqa_w)); pia.irqb_handler().set(FUNC(truco_state::pia_irqb_w)); /* video hardware */ screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER)); screen.set_refresh_hz(60); screen.set_vblank_time(ATTOSECONDS_IN_USEC(2500) /* not accurate */); screen.set_size(256, 192); screen.set_visarea(0, 256-1, 0, 192-1); screen.set_screen_update(FUNC(truco_state::screen_update)); PALETTE(config, "palette", FUNC(truco_state::truco_palette), 16); mc6845_device &crtc(MC6845(config, "crtc", CRTC_CLOCK)); /* Identified as UM6845 */ crtc.set_screen("screen"); crtc.set_show_border_area(false); crtc.set_char_width(4); /* sound hardware */ SPEAKER(config, "speaker").front_center(); DAC_1BIT(config, m_dac, 0).add_route(ALL_OUTPUTS, "speaker", 0.4); voltage_regulator_device &vref(VOLTAGE_REGULATOR(config, "vref", 0)); vref.add_route(0, "dac", 1.0, DAC_VREF_POS_INPUT); } /*************************************************************************** Game driver(s) ***************************************************************************/ ROM_START( truco ) ROM_REGION( 0x10000, "maincpu", 0 ) ROM_LOAD( "truco.u3", 0x08000, 0x4000, CRC(4642fb96) SHA1(e821f6fd582b141a5ca2d5bd53f817697048fb81) ) ROM_LOAD( "truco.u2", 0x0c000, 0x4000, CRC(ff355750) SHA1(1538f20b1919928ffca439e4046a104ddfbc756c) ) ROM_END // YEAR NAME PARENT MACHINE INPUT STATE INIT ROT COMPANY FULLNAME FLAGS GAME( 198?, truco, 0, truco, truco, truco_state, empty_init, ROT0, "Playtronic SRL", "Truco-Tron", MACHINE_SUPPORTS_SAVE )