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Diffstat (limited to 'src/mame/drivers/electron.cpp')
-rw-r--r-- | src/mame/drivers/electron.cpp | 309 |
1 files changed, 0 insertions, 309 deletions
diff --git a/src/mame/drivers/electron.cpp b/src/mame/drivers/electron.cpp deleted file mode 100644 index cc799facb50..00000000000 --- a/src/mame/drivers/electron.cpp +++ /dev/null @@ -1,309 +0,0 @@ -// license:BSD-3-Clause -// copyright-holders:Wilbert Pol -/****************************************************************************** - Acorn Electron driver - By Wilbert Pol - -Hardware Overview ------------------ -The Acorn Electron is a budget version of the BBC Micro home computer -Basic specs are: -6502 CPU @ 2MHz or 1MHz -32k RAM and 32k ROM -Text modes: 20x32, 40x25, 40x32, 80x25, 80x32 -Graphics modes: 160x256 (4 or 16 colors), 320x256 (2 or 4 colors), 640x256 (2 colors), 320x200 (2 colors), 640x200 (2 colors) -Colors: 8 colors (either solid or flashing) -Sound: 1 channel, 7 octaves; built-in speaker -Internal ports for cassette storage, RGB/CVBS monitors and TV output -Various expansions can be added via the rear expansion port - -PCB Layout ----------- |-------------------| - |--------| EXPANSION PORT | -|-----|---------------------| |---||---------| -|MOD | SPKR 16MHz LS169 18VAC|| []18VAC INPUT -| |17.7345MHz ROM 18VAC|| POWER | -|-----| 74S04 |----| || SUPPLY | -| KBD_CONN 6502 |ULA | || | -|CVBS |----| || +5VDC | -|RGB LS00 LS86 || -5VDC | -| PWR|| | -|CASS LM324 LS00 LS86 S74 LS74 4164 4164 4164 4164 || | -|------------------------------------------------------------||---------| -Notes: (all IC's shown. Only 16 ICs are used) - 6502 - 6502 CPU, clock input 2.000MHz [16/8] - ULA - Custom logic chip 12CO21, also containing most of the BBC Micro circuitry - Early PCB revisions used a PLCC68 chip in a socket. Later revisions used a - PGA68 chip soldered directly into the motherboard - 4164 - 4164 64k x4-bit DRAM (4 chips for 32kbytes total) - ROM - Hitachi HN613256 32k x8-bit mask ROM containing OS & BASIC - LM324 - Texas Instruments LM324 Operational Amplifier - MOD - UHF TV modulator UM1233-E36 - CVBS - Composite color video output socket - RGB - RGB monitor video output socket - CASS - Cassette port - PWR - 3-pin power input from internal power supply - KBD_CONN - 22-pin keyboard connector - SPKR - 2-pin internal speaker connector - -****************************************************************************** -Emulation notes: - -I don't have a real system to verify the behaviour of the emulation. The things -that can be done through BASIC programs seem to behave properly (most of the time :). - -Incomplete: - - Sound (sound is too high?) - - Graphics (seems to be wrong for several games) - - 1 MHz bus is not emulated - - Bus claiming by ULA is not implemented - -******************************************************************************/ - -#include "emu.h" -#include "cpu/m6502/m6502.h" -#include "includes/electron.h" -#include "imagedev/cassette.h" -#include "formats/uef_cas.h" -#include "formats/csw_cas.h" -#include "sound/beep.h" -#include "screen.h" -#include "softlist.h" -#include "speaker.h" - -static const rgb_t electron_palette[8]= -{ - rgb_t(0x0ff,0x0ff,0x0ff), - rgb_t(0x000,0x0ff,0x0ff), - rgb_t(0x0ff,0x000,0x0ff), - rgb_t(0x000,0x000,0x0ff), - rgb_t(0x0ff,0x0ff,0x000), - rgb_t(0x000,0x0ff,0x000), - rgb_t(0x0ff,0x000,0x000), - rgb_t(0x000,0x000,0x000) -}; - -void electron_state::electron_colours(palette_device &palette) const -{ - palette.set_pen_colors(0, electron_palette); -} - -void electron_state::electron_mem(address_map &map) -{ - map(0x0000, 0x7fff).rw(FUNC(electron_state::electron_mem_r), FUNC(electron_state::electron_mem_w)); /* 32KB of RAM */ - map(0x8000, 0xbfff).rw(FUNC(electron_state::electron_paged_r), FUNC(electron_state::electron_paged_w)); /* Banked ROM pages */ - map(0xc000, 0xffff).rw(FUNC(electron_state::electron_mos_r), FUNC(electron_state::electron_mos_w)); /* OS ROM */ - map(0xfc00, 0xfcff).rw(FUNC(electron_state::electron_fred_r), FUNC(electron_state::electron_fred_w)); /* FRED */ - map(0xfd00, 0xfdff).rw(FUNC(electron_state::electron_jim_r), FUNC(electron_state::electron_jim_w)); /* JIM */ - map(0xfe00, 0xfeff).rw(FUNC(electron_state::electron_sheila_r), FUNC(electron_state::electron_sheila_w)); /* SHEILA */ -} - -void electron_state::electron64_opcodes(address_map &map) -{ - map(0x0000, 0xffff).r(FUNC(electron_state::electron64_fetch_r)); -} - -INPUT_CHANGED_MEMBER(electron_state::trigger_reset) -{ - m_maincpu->set_input_line(INPUT_LINE_RESET, newval ? ASSERT_LINE : CLEAR_LINE); - if (!newval) - { - m_exp->reset(); - } -} - -static INPUT_PORTS_START( electron ) - PORT_START("LINE.0") - PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("\xE2\x86\x92 | \\") PORT_CODE(KEYCODE_BACKSLASH) PORT_CHAR(UCHAR_MAMEKEY(RIGHT)) PORT_CHAR('|') PORT_CHAR('\\') // on the real keyboard, this would be on the 1st row, the 3rd key after 0 - PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("COPY") PORT_CODE(KEYCODE_END) PORT_CHAR(UCHAR_MAMEKEY(F1)) PORT_CHAR('[') PORT_CHAR(']') - PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_UNUSED) - PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_SPACE) PORT_CHAR(' ') - - PORT_START("LINE.1") - PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("\xE2\x86\x90 ^ ~") PORT_CODE(KEYCODE_EQUALS) PORT_CHAR(UCHAR_MAMEKEY(LEFT)) PORT_CHAR('^') PORT_CHAR('~') - PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("\xE2\x86\x93 _ }") PORT_CODE(KEYCODE_CLOSEBRACE) PORT_CHAR(UCHAR_MAMEKEY(DOWN)) PORT_CHAR('_') PORT_CHAR('}') - PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("RETURN") PORT_CODE(KEYCODE_ENTER) PORT_CHAR(13) - PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("DELETE") PORT_CODE(KEYCODE_BACKSPACE) PORT_CHAR(8) - - PORT_START("LINE.2") - PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_MINUS) PORT_CHAR('-') PORT_CHAR('=') - PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("\xE2\x86\x91 \xC2\xA3 {") PORT_CODE(KEYCODE_OPENBRACE) PORT_CHAR(UCHAR_MAMEKEY(UP)) PORT_CHAR(0xA3) PORT_CHAR('{') - PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_QUOTE) PORT_CHAR(':') PORT_CHAR('*') - PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_UNUSED) - - PORT_START("LINE.3") - PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_0) PORT_CHAR('0') PORT_CHAR('@') - PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_P) PORT_CHAR('p') PORT_CHAR('P') - PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_COLON) PORT_CHAR(';') PORT_CHAR('+') - PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_SLASH) PORT_CHAR('/') PORT_CHAR('?') - - PORT_START("LINE.4") - PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_CHAR(')') - PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_O) PORT_CHAR('o') PORT_CHAR('O') - PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_L) PORT_CHAR('l') PORT_CHAR('L') - PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_STOP) PORT_CHAR('.') PORT_CHAR('>') - - PORT_START("LINE.5") - PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_8) PORT_CHAR('8') PORT_CHAR('(') - PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_I) PORT_CHAR('i') PORT_CHAR('I') - PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_K) PORT_CHAR('k') PORT_CHAR('K') - PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_COMMA) PORT_CHAR(',') PORT_CHAR('<') - - PORT_START("LINE.6") - PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_CHAR('\'') - PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_U) PORT_CHAR('u') PORT_CHAR('U') - PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_J) PORT_CHAR('j') PORT_CHAR('J') - PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_M) PORT_CHAR('m') PORT_CHAR('M') - - PORT_START("LINE.7") - PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_CHAR('&') - PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_Y) PORT_CHAR('y') PORT_CHAR('Y') - PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_H) PORT_CHAR('h') PORT_CHAR('H') - PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_N) PORT_CHAR('n') PORT_CHAR('N') - - PORT_START("LINE.8") - PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_5) PORT_CHAR('5') PORT_CHAR('%') - PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_T) PORT_CHAR('t') PORT_CHAR('T') - PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_G) PORT_CHAR('g') PORT_CHAR('G') - PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_B) PORT_CHAR('b') PORT_CHAR('B') - - PORT_START("LINE.9") - PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_4) PORT_CHAR('4') PORT_CHAR('$') - PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_R) PORT_CHAR('r') PORT_CHAR('R') - PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_F) PORT_CHAR('f') PORT_CHAR('F') - PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_V) PORT_CHAR('v') PORT_CHAR('V') - - PORT_START("LINE.10") - PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_3) PORT_CHAR('3') PORT_CHAR('#') - PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_E) PORT_CHAR('e') PORT_CHAR('E') - PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_D) PORT_CHAR('d') PORT_CHAR('D') - PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_C) PORT_CHAR('c') PORT_CHAR('C') - - PORT_START("LINE.11") - PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_CHAR('"') - PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_W) PORT_CHAR('w') PORT_CHAR('W') - PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_S) PORT_CHAR('s') PORT_CHAR('S') - PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_X) PORT_CHAR('x') PORT_CHAR('X') - - PORT_START("LINE.12") - PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_CHAR('!') - PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_Q) PORT_CHAR('q') PORT_CHAR('Q') - PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_A) PORT_CHAR('a') PORT_CHAR('A') - PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_Z) PORT_CHAR('z') PORT_CHAR('Z') - - PORT_START("LINE.13") - PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("ESCAPE") PORT_CODE(KEYCODE_ESC) PORT_CHAR(UCHAR_MAMEKEY(ESC)) - PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("FUNC") PORT_CODE(KEYCODE_TAB) PORT_CHAR(UCHAR_MAMEKEY(LALT)) - PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_LCONTROL) PORT_CODE(KEYCODE_RCONTROL) PORT_CHAR(UCHAR_SHIFT_2) - PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_RSHIFT) PORT_CODE(KEYCODE_LSHIFT) PORT_CHAR(UCHAR_SHIFT_1) - - PORT_START("BRK") /* BREAK */ - PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("BREAK") PORT_CODE(KEYCODE_F12) PORT_CHAR(UCHAR_MAMEKEY(F12)) PORT_CHANGED_MEMBER(DEVICE_SELF, electron_state, trigger_reset, 0) -INPUT_PORTS_END - -static INPUT_PORTS_START( electron64 ) - PORT_INCLUDE(electron) - - PORT_START("MRB") - PORT_CONFNAME(0x03, 0x02, "MRB Mode") - PORT_CONFSETTING(0x00, "Normal") - PORT_CONFSETTING(0x01, "Turbo") - PORT_CONFSETTING(0x02, "64K") -INPUT_PORTS_END - -void electron_state::electron(machine_config &config) -{ - M6502(config, m_maincpu, 16_MHz_XTAL / 8); - m_maincpu->set_addrmap(AS_PROGRAM, &electron_state::electron_mem); - - SCREEN(config, m_screen, SCREEN_TYPE_RASTER); - m_screen->set_raw(16_MHz_XTAL, 1024, 0, 640, 312, 0, 256); - //m_screen->set_raw(16_MHz_XTAL, 1024, 264, 264 + 640, 312, 31, 31 + 256) - m_screen->set_screen_update(FUNC(electron_state::screen_update_electron)); - m_screen->set_video_attributes(VIDEO_UPDATE_SCANLINE); - m_screen->set_palette("palette"); - - PALETTE(config, "palette", FUNC(electron_state::electron_colours), 8); - - SPEAKER(config, "mono").front_center(); - BEEP(config, m_beeper, 300).add_route(ALL_OUTPUTS, "mono", 1.00); - - RAM(config, m_ram).set_default_size("32K"); - - CASSETTE(config, m_cassette); - m_cassette->set_formats(bbc_cassette_formats); - m_cassette->set_default_state(CASSETTE_PLAY | CASSETTE_MOTOR_DISABLED); - m_cassette->set_interface("electron_cass"); - - /* expansion port */ - ELECTRON_EXPANSION_SLOT(config, m_exp, 16_MHz_XTAL, electron_expansion_devices, "plus3"); - m_exp->irq_handler().set_inputline(m_maincpu, M6502_IRQ_LINE); - m_exp->nmi_handler().set_inputline(m_maincpu, M6502_NMI_LINE); - - /* software lists */ - SOFTWARE_LIST(config, "cass_list").set_original("electron_cass"); - SOFTWARE_LIST(config, "cart_list").set_original("electron_cart"); - SOFTWARE_LIST(config, "flop_list").set_original("electron_flop"); - SOFTWARE_LIST(config, "rom_list").set_original("electron_rom"); -} - - -void electron_state::btm2105(machine_config &config) -{ - electron(config); - - m_screen->set_color(rgb_t::amber()); - - /* expansion port */ - m_exp->set_default_option("m2105"); - m_exp->set_fixed(true); - - /* software lists */ - config.device_remove("cass_list"); - config.device_remove("cart_list"); - config.device_remove("flop_list"); - config.device_remove("rom_list"); -} - - -void electron_state::electron64(machine_config &config) -{ - electron(config); - - m_maincpu->set_addrmap(AS_PROGRAM, &electron_state::electron_mem); - m_maincpu->set_addrmap(AS_OPCODES, &electron_state::electron64_opcodes); - - m_ram->set_default_size("64K"); -} - - -ROM_START(electron) - ROM_REGION( 0x4000, "mos", 0 ) - ROM_LOAD( "b02_acornos-1.rom", 0x0000, 0x4000, CRC(a0c2cf43) SHA1(a27ce645472cc5497690e4bfab43710efbb0792d) ) - ROM_REGION( 0x4000, "basic", 0 ) - ROM_LOAD( "basic.rom", 0x0000, 0x4000, CRC(79434781) SHA1(4a7393f3a45ea309f744441c16723e2ef447a281) ) -ROM_END - -ROM_START(electront) - ROM_REGION( 0x4000, "mos", 0 ) - /* Serial 06-ALA01-0000087 from Centre for Computing History */ - ROM_LOAD( "elk_036.rom", 0x0000, 0x4000, CRC(dd1a99c3) SHA1(87ee1b14895e476909dd002d5ca2346a3a5f3f57) ) - ROM_REGION( 0x4000, "basic", 0 ) - ROM_LOAD( "basic.rom", 0x0000, 0x4000, CRC(79434781) SHA1(4a7393f3a45ea309f744441c16723e2ef447a281) ) -ROM_END - -ROM_START(electron64) - ROM_REGION( 0x4000, "mos", 0 ) - ROM_LOAD( "os_300.rom", 0x0000, 0x4000, CRC(f80a0cea) SHA1(165e42ff4164a842e56f08ebd420d5027af99fdd) ) - ROM_REGION(0x4000, "basic", 0) - ROM_LOAD( "basic.rom", 0x0000, 0x4000, CRC(79434781) SHA1(4a7393f3a45ea309f744441c16723e2ef447a281) ) -ROM_END - -#define rom_btm2105 rom_electron - - -/* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */ -COMP ( 1983, electron, 0, 0, electron, electron, electron_state, empty_init, "Acorn", "Acorn Electron", MACHINE_IMPERFECT_SOUND | MACHINE_IMPERFECT_GRAPHICS ) -COMP ( 1983, electront, electron, 0, electron, electron, electron_state, empty_init, "Acorn", "Acorn Electron (Trial)", MACHINE_IMPERFECT_SOUND | MACHINE_IMPERFECT_GRAPHICS ) -COMP ( 1985, btm2105, electron, 0, btm2105, electron, electron_state, empty_init, "British Telecom Business Systems", "BT Merlin M2105", MACHINE_NOT_WORKING ) -COMP ( 1987, electron64, electron, 0, electron64, electron64, electron_state, empty_init, "Acorn/Slogger", "Acorn Electron (64K Master RAM Board)", MACHINE_IMPERFECT_SOUND | MACHINE_IMPERFECT_GRAPHICS ) |