// license:MAME // copyright-holders:Robbbert /*************************************************************************** Ravensburger Selbstbaucomputer This is a project described in "Ravensburger" magazine. You had to make the entire thing (including the circuit boards) yourself. http://petersieg.bplaced.com/?2650_Computer:2650_Selbstbaucomputer 2013-04-23 Skeleton driver. No instructions, no schematics - it's all guesswork. The cassette saves a noise but it returns a bad load. Version 0.9 ----------- Hardware: 0000-07FF ROM "MON1" 0800-1FFF RAM (3x HM6116) 24 pushbuttons and 6-digit LED display on front panel. Other buttons and switches on the main board. The few photos show the CPU and a number of ordinary 74LSxxx chips. There is a XTAL of unknown frequency. The buttons are labelled CMD, RUN, GOTO, RST, F, MON, PC, NXT but at this time not all buttons are identified. What is known: - Press NXT to read memory. Press NXT again to read the next address. - Press PC and it says PCxxxx - Press CMD, it says CND=, you can choose one of these: -- A displays value of a register. Press A again to see more registers. -- B sets a breakpoint -- C clears a breakpoint -- D dumps blocks to tape -- E examine tape file -- F fetch (load) from tape Quickload: Load the program then press Y. There are 6 that work and 6 that do nothing. ToDo: - Cassette Version V2.0 ------------ This used a terminal interface with a few non-standard control codes. The pushbuttons and LEDs appear to have been done away with. Commands (must be in uppercase): A Examine memory; press C to alter memory B Set breakpoint? C View breakpoint? D Dump to screen and tape (at the same time) E Execute I ? L Load R ? V Verify? ToDo: - Cassette ****************************************************************************/ #include "emu.h" #include "cpu/s2650/s2650.h" #include "imagedev/cassette.h" #include "imagedev/snapquik.h" #include "machine/terminal.h" #include "sound/wave.h" #include "ravens.lh" #define TERMINAL_TAG "terminal" class ravens_state : public driver_device { public: ravens_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag), m_maincpu(*this, "maincpu"), m_terminal(*this, TERMINAL_TAG), m_cass(*this, "cassette") { } DECLARE_READ8_MEMBER(port07_r); DECLARE_READ8_MEMBER(port17_r); DECLARE_WRITE8_MEMBER(port1b_w); DECLARE_WRITE8_MEMBER(port1c_w); DECLARE_WRITE8_MEMBER(display_w); DECLARE_WRITE8_MEMBER(leds_w); DECLARE_WRITE8_MEMBER(kbd_put); DECLARE_MACHINE_RESET(ravens2); DECLARE_READ8_MEMBER(cass_r); DECLARE_WRITE_LINE_MEMBER(cass_w); DECLARE_QUICKLOAD_LOAD_MEMBER( ravens ); UINT8 m_term_char; UINT8 m_term_data; required_device m_maincpu; optional_device m_terminal; required_device m_cass; }; WRITE_LINE_MEMBER( ravens_state::cass_w ) { m_cass->output(state ? -1.0 : +1.0); } READ8_MEMBER( ravens_state::cass_r ) { return (m_cass->input() > 0.03) ? 1 : 0; } WRITE8_MEMBER( ravens_state::display_w ) { output_set_digit_value(offset, data); } WRITE8_MEMBER( ravens_state::leds_w ) { char ledname[8]; for (int i = 0; i < 8; i++) { sprintf(ledname,"led%d",i); output_set_value(ledname, !BIT(data, i)); } } READ8_MEMBER( ravens_state::port07_r ) { UINT8 ret = m_term_data; m_term_data = 0x80; return ret; } READ8_MEMBER( ravens_state::port17_r ) { UINT8 keyin, i; keyin = ioport("X0")->read(); if (keyin != 0xff) for (i = 0; i < 8; i++) if BIT(~keyin, i) return i | 0x80; keyin = ioport("X1")->read(); if (keyin != 0xff) for (i = 0; i < 8; i++) if BIT(~keyin, i) return i | 0x88; keyin = ioport("X2")->read(); if (!BIT(keyin, 0)) m_maincpu->reset(); if (keyin != 0xff) for (i = 0; i < 8; i++) if BIT(~keyin, i) return (i<<4) | 0x80; return 0; } WRITE8_MEMBER( ravens_state::port1b_w ) { if (BIT(data, 7)) return; else if ((data == 0x08 && m_term_char == 0x20)) data = 0x0c; // FormFeed else if ((data == 0x0a && m_term_char == 0x20)) data = 0x0a; // LineFeed else if ((data == 0x01 && m_term_char == 0xc2)) data = 0x0d; // CarriageReturn else data = m_term_char; m_terminal->write(space, 0, data); } WRITE8_MEMBER( ravens_state::port1c_w ) { m_term_char = data; } MACHINE_RESET_MEMBER( ravens_state, ravens2 ) { m_term_data = 0x80; output_set_digit_value(6, 0); } static ADDRESS_MAP_START( ravens_mem, AS_PROGRAM, 8, ravens_state ) ADDRESS_MAP_UNMAP_HIGH AM_RANGE( 0x0000, 0x07ff) AM_ROM AM_RANGE( 0x0800, 0x1fff) AM_RAM AM_RANGE( 0x2000, 0x7FFF) AM_RAM // for quickload, optional ADDRESS_MAP_END static ADDRESS_MAP_START( ravens_io, AS_IO, 8, ravens_state ) ADDRESS_MAP_UNMAP_HIGH AM_RANGE(0x09, 0x09) AM_WRITE(leds_w) // LED output port AM_RANGE(0x10, 0x15) AM_WRITE(display_w) // 6-led display AM_RANGE(0x17, 0x17) AM_READ(port17_r) // pushbuttons AM_RANGE(S2650_SENSE_PORT, S2650_SENSE_PORT) AM_READ(cass_r) ADDRESS_MAP_END static ADDRESS_MAP_START( ravens2_io, AS_IO, 8, ravens_state ) ADDRESS_MAP_UNMAP_HIGH AM_RANGE(0x07, 0x07) AM_READ(port07_r) AM_RANGE(0x1b, 0x1b) AM_WRITE(port1b_w) AM_RANGE(0x1c, 0x1c) AM_WRITE(port1c_w) AM_RANGE(S2650_SENSE_PORT, S2650_SENSE_PORT) AM_READ(cass_r) ADDRESS_MAP_END /* Input ports */ static INPUT_PORTS_START( ravens ) PORT_START("X0") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("0") PORT_CODE(KEYCODE_0) PORT_CHAR('0') PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("1") PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("2") PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("3") PORT_CODE(KEYCODE_3) PORT_CHAR('3') PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("4") PORT_CODE(KEYCODE_4) PORT_CHAR('4') PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("5") PORT_CODE(KEYCODE_5) PORT_CHAR('5') PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("6") PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("7") PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_START("X1") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("8") PORT_CODE(KEYCODE_8) PORT_CHAR('8') PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("9") PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("A") PORT_CODE(KEYCODE_A) PORT_CHAR('A') PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("B") PORT_CODE(KEYCODE_B) PORT_CHAR('B') PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("C") PORT_CODE(KEYCODE_C) PORT_CHAR('C') PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("D") PORT_CODE(KEYCODE_D) PORT_CHAR('D') PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("E") PORT_CODE(KEYCODE_E) PORT_CHAR('E') PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("F") PORT_CODE(KEYCODE_F) PORT_CHAR('F') PORT_START("X2") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("RST") PORT_CODE(KEYCODE_F3) PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("NXT") PORT_CODE(KEYCODE_UP) PORT_CHAR('^') PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("RUN") PORT_CODE(KEYCODE_X) PORT_CHAR('X') PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("PC") PORT_CODE(KEYCODE_P) PORT_CHAR('P') PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("???") PORT_CODE(KEYCODE_Y) PORT_CHAR('Y') PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("???") PORT_CODE(KEYCODE_U) PORT_CHAR('U') PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("CMD") PORT_CODE(KEYCODE_M) PORT_CHAR('M') PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("???") PORT_CODE(KEYCODE_O) PORT_CHAR('O') INPUT_PORTS_END WRITE8_MEMBER( ravens_state::kbd_put ) { if (data > 0x60) data -= 0x20; // fold to uppercase m_term_data = data; } QUICKLOAD_LOAD_MEMBER( ravens_state, ravens ) { address_space &space = m_maincpu->space(AS_PROGRAM); int i; int quick_addr = 0x900; int exec_addr; int quick_length; dynamic_buffer quick_data; int read_; int result = IMAGE_INIT_FAIL; quick_length = image.length(); if (quick_length < 0x0900) { image.seterror(IMAGE_ERROR_INVALIDIMAGE, "File too short"); image.message(" File too short"); } else if (quick_length > 0x8000) { image.seterror(IMAGE_ERROR_INVALIDIMAGE, "File too long"); image.message(" File too long"); } else { quick_data.resize(quick_length); read_ = image.fread( quick_data, quick_length); if (read_ != quick_length) { image.seterror(IMAGE_ERROR_INVALIDIMAGE, "Cannot read the file"); image.message(" Cannot read the file"); } else if (quick_data[0] != 0xc6) { image.seterror(IMAGE_ERROR_INVALIDIMAGE, "Invalid header"); image.message(" Invalid header"); } else { exec_addr = quick_data[2] * 256 + quick_data[3]; if (exec_addr >= quick_length) { image.seterror(IMAGE_ERROR_INVALIDIMAGE, "Exec address beyond end of file"); image.message(" Exec address beyond end of file"); } else { for (i = quick_addr; i < read_; i++) space.write_byte(i, quick_data[i]); /* display a message about the loaded quickload */ image.message(" Quickload: size=%04X : exec=%04X",quick_length,exec_addr); // Start the quickload m_maincpu->set_state_int(S2650_PC, exec_addr); result = IMAGE_INIT_PASS; } } } return result; } static MACHINE_CONFIG_START( ravens, ravens_state ) /* basic machine hardware */ MCFG_CPU_ADD("maincpu",S2650, XTAL_1MHz) // frequency is unknown MCFG_CPU_PROGRAM_MAP(ravens_mem) MCFG_CPU_IO_MAP(ravens_io) MCFG_S2650_FLAG_HANDLER(WRITELINE(ravens_state, cass_w)) /* video hardware */ MCFG_DEFAULT_LAYOUT(layout_ravens) /* quickload */ MCFG_QUICKLOAD_ADD("quickload", ravens_state, ravens, "pgm", 1) /* cassette */ MCFG_CASSETTE_ADD( "cassette" ) MCFG_SPEAKER_STANDARD_MONO("mono") MCFG_SOUND_WAVE_ADD(WAVE_TAG, "cassette") MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.25) MACHINE_CONFIG_END static MACHINE_CONFIG_START( ravens2, ravens_state ) /* basic machine hardware */ MCFG_CPU_ADD("maincpu",S2650, XTAL_1MHz) // frequency is unknown MCFG_CPU_PROGRAM_MAP(ravens_mem) MCFG_CPU_IO_MAP(ravens2_io) MCFG_S2650_FLAG_HANDLER(WRITELINE(ravens_state, cass_w)) MCFG_MACHINE_RESET_OVERRIDE(ravens_state, ravens2) /* video hardware */ MCFG_DEVICE_ADD(TERMINAL_TAG, GENERIC_TERMINAL, 0) MCFG_GENERIC_TERMINAL_KEYBOARD_CB(WRITE8(ravens_state, kbd_put)) /* quickload */ MCFG_QUICKLOAD_ADD("quickload", ravens_state, ravens, "pgm", 1) /* cassette */ MCFG_CASSETTE_ADD( "cassette" ) MCFG_SPEAKER_STANDARD_MONO("mono") MCFG_SOUND_WAVE_ADD(WAVE_TAG, "cassette") MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.25) MACHINE_CONFIG_END /* ROM definition */ ROM_START( ravens ) ROM_REGION( 0x8000, "maincpu", 0 ) ROM_SYSTEM_BIOS( 0, "v1.0", "V1.0" ) ROMX_LOAD( "mon_v1.0.bin", 0x0000, 0x0800, CRC(785eb1ad) SHA1(c316b8ac32ab6aa37746af37b9f81a23367fedd8), ROM_BIOS(1)) ROM_SYSTEM_BIOS( 1, "v0.9", "V0.9" ) ROMX_LOAD( "mon_v0_9.bin", 0x0000, 0x07b5, CRC(2f9b9178) SHA1(ec2ebbc80ee9ff2502c1409ab4f99127032ed724), ROM_BIOS(2)) ROM_END ROM_START( ravens2 ) ROM_REGION( 0x8000, "maincpu", 0 ) ROM_LOAD( "mon_v2.0.bin", 0x0000, 0x0800, CRC(bcd47c58) SHA1(f261a3f128fbedbf59a8b5480758fff4d7f76de1)) ROM_END /* Driver */ /* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */ COMP( 1984, ravens, 0, 0, ravens, ravens, driver_device, 0, "Joseph Glagla and Dieter Feiler", "Ravensburger Selbstbaucomputer V0.9", GAME_NO_SOUND_HW ) COMP( 1985, ravens2, ravens, 0, ravens2, ravens, driver_device, 0, "Joseph Glagla and Dieter Feiler", "Ravensburger Selbstbaucomputer V2.0", GAME_NO_SOUND_HW )