// license:BSD-3-Clause // copyright-holders:Robbbert /*************************************************************************** Aamber Pegasus computer (New Zealand) http://web.mac.com/lord_philip/aamber_pegasus/Aamber_Pegasus.html Each copy of the monitor rom was made for an individual machine. The early bios versions checked that it was running on that particular computer. This computer has no sound. The usual way of loading a new rom was to plug it into the board. We have replaced this with cartslots, to save having to recompile whenever a new rom is found. Single rom programs will usually work in any slot (if it is going to work at all). A working rom will appear in the menu. Press the first letter to run it. If a machine language program is loaded via cassette, do it in the Monitor (L command), when loaded press Enter, and it will be in the menu. Basic cassettes are loaded in the usual way, that is, start Basic, type LOAD, press Enter. When done, RUN or LIST as needed. The Aamber Pegasus uses a MCM66710P, which is functionally equivalent to the MCM6571. Note that datasheet is incorrect for the number "9". The first byte is really 0x3E rather than 0x3F, confirmed on real hardware. TO DO: - Work on the other non-working programs ****************************************************************************/ #include "emu.h" #include "cpu/m6809/m6809.h" #include "machine/6821pia.h" #include "imagedev/cassette.h" #include "sound/wave.h" #include "bus/generic/slot.h" #include "bus/generic/carts.h" #include "softlist.h" class pegasus_state : public driver_device { public: pegasus_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag) , m_maincpu(*this, "maincpu") , m_cass(*this, "cassette") , m_pia_s(*this, "pia_s") , m_pia_u(*this, "pia_u") , m_exp_00(*this, "exp00") , m_exp_01(*this, "exp01") , m_exp_02(*this, "exp02") , m_exp_0c(*this, "exp0c") , m_exp_0d(*this, "exp0d") , m_p_videoram(*this, "videoram") , m_io_keyboard(*this, "KEY") { } DECLARE_READ8_MEMBER(pegasus_keyboard_r); DECLARE_READ8_MEMBER(pegasus_protection_r); DECLARE_READ8_MEMBER(pegasus_pcg_r); DECLARE_WRITE8_MEMBER(pegasus_controls_w); DECLARE_WRITE8_MEMBER(pegasus_keyboard_w); DECLARE_WRITE8_MEMBER(pegasus_pcg_w); DECLARE_READ_LINE_MEMBER(pegasus_keyboard_irq); DECLARE_READ_LINE_MEMBER(pegasus_cassette_r); DECLARE_WRITE_LINE_MEMBER(pegasus_cassette_w); DECLARE_WRITE_LINE_MEMBER(pegasus_firq_clr); UINT32 screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect); DECLARE_DRIVER_INIT(pegasus); TIMER_DEVICE_CALLBACK_MEMBER(pegasus_firq); int load_cart(device_image_interface &image, generic_slot_device *slot, const char *reg_tag); DECLARE_DEVICE_IMAGE_LOAD_MEMBER(exp00_load) { return load_cart(image, m_exp_00, "0000"); } DECLARE_DEVICE_IMAGE_LOAD_MEMBER(exp01_load) { return load_cart(image, m_exp_01, "1000"); } DECLARE_DEVICE_IMAGE_LOAD_MEMBER(exp02_load) { return load_cart(image, m_exp_02, "2000"); } DECLARE_DEVICE_IMAGE_LOAD_MEMBER(exp0c_load) { return load_cart(image, m_exp_0c, "c000"); } DECLARE_DEVICE_IMAGE_LOAD_MEMBER(exp0d_load) { return load_cart(image, m_exp_0d, "d000"); } private: UINT8 m_kbd_row; bool m_kbd_irq; UINT8 *m_p_pcgram; const UINT8 *m_p_chargen; UINT8 m_control_bits; virtual void machine_reset() override; virtual void machine_start() override; virtual void video_start() override; void pegasus_decrypt_rom(UINT8 *ROM); required_device m_maincpu; required_device m_cass; required_device m_pia_s; required_device m_pia_u; required_device m_exp_00; required_device m_exp_01; required_device m_exp_02; required_device m_exp_0c; required_device m_exp_0d; required_shared_ptr m_p_videoram; required_ioport_array<8> m_io_keyboard; }; TIMER_DEVICE_CALLBACK_MEMBER(pegasus_state::pegasus_firq) { m_maincpu->set_input_line(M6809_FIRQ_LINE, HOLD_LINE); } WRITE_LINE_MEMBER( pegasus_state::pegasus_firq_clr ) { m_maincpu->set_input_line(M6809_FIRQ_LINE, CLEAR_LINE); } READ8_MEMBER( pegasus_state::pegasus_keyboard_r ) { UINT8 i,data = 0xff; for (i = 0; i < 8; i++) if (!BIT(m_kbd_row, i)) data &= m_io_keyboard[i]->read(); m_kbd_irq = (data == 0xff) ? 1 : 0; if BIT(m_control_bits, 3) data<<=4; return data; } WRITE8_MEMBER( pegasus_state::pegasus_keyboard_w ) { m_kbd_row = data; } WRITE8_MEMBER( pegasus_state::pegasus_controls_w ) { /* d0,d2 - not emulated d0 - Blank - Video blanking d1 - Char - select character rom or ram d2 - Page - enables writing to video ram d3 - Asc - Select which half of the keyboard to read */ m_control_bits = data; } READ_LINE_MEMBER( pegasus_state::pegasus_keyboard_irq ) { return m_kbd_irq; } READ_LINE_MEMBER( pegasus_state::pegasus_cassette_r ) { return m_cass->input(); } WRITE_LINE_MEMBER( pegasus_state::pegasus_cassette_w ) { m_cass->output(state ? 1 : -1); } READ8_MEMBER( pegasus_state::pegasus_pcg_r ) { UINT8 code = m_p_videoram[offset] & 0x7f; return m_p_pcgram[(code << 4) | (~m_kbd_row & 15)]; } WRITE8_MEMBER( pegasus_state::pegasus_pcg_w ) { // if BIT(m_control_bits, 1) { UINT8 code = m_p_videoram[offset] & 0x7f; m_p_pcgram[(code << 4) | (~m_kbd_row & 15)] = data; } } /* Must return the A register except when it is doing a rom search */ READ8_MEMBER( pegasus_state::pegasus_protection_r ) { UINT8 data = m_maincpu->state_int(M6809_A); if (data == 0x20) data = 0xff; return data; } static ADDRESS_MAP_START(pegasus_mem, AS_PROGRAM, 8, pegasus_state) ADDRESS_MAP_UNMAP_HIGH //AM_RANGE(0x0000, 0x2fff) // mapped by the cartslots 1-3 AM_RANGE(0xb000, 0xbdff) AM_RAM AM_RANGE(0xbe00, 0xbfff) AM_RAM AM_SHARE("videoram") //AM_RANGE(0xc000, 0xdfff) // mapped by the cartslots 4-5 AM_RANGE(0xe000, 0xe1ff) AM_READ(pegasus_protection_r) AM_RANGE(0xe200, 0xe3ff) AM_READWRITE(pegasus_pcg_r,pegasus_pcg_w) AM_RANGE(0xe400, 0xe403) AM_MIRROR(0x1fc) AM_DEVREADWRITE("pia_u", pia6821_device, read, write) AM_RANGE(0xe600, 0xe603) AM_MIRROR(0x1fc) AM_DEVREADWRITE("pia_s", pia6821_device, read, write) AM_RANGE(0xf000, 0xffff) AM_ROM ADDRESS_MAP_END static ADDRESS_MAP_START(pegasusm_mem, AS_PROGRAM, 8, pegasus_state) ADDRESS_MAP_UNMAP_HIGH AM_IMPORT_FROM(pegasus_mem) AM_RANGE(0x5000, 0xafff) AM_RAM ADDRESS_MAP_END /* Input ports */ static INPUT_PORTS_START( pegasus ) PORT_START("KEY.0") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("= +") PORT_CODE(KEYCODE_EQUALS) PORT_CHAR('=') PORT_CHAR('+') PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("0 )") PORT_CODE(KEYCODE_0) PORT_CHAR('0') PORT_CHAR(')') PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("BackSpace") PORT_CODE(KEYCODE_BACKSPACE) PORT_CHAR(8) PORT_CHAR(8) PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Break") PORT_CODE(KEYCODE_NUMLOCK) PORT_CHAR(20) PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("\\ |") PORT_CODE(KEYCODE_BACKSLASH) PORT_CHAR('\\') PORT_CHAR('|') PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("; :") PORT_CODE(KEYCODE_COLON) PORT_CHAR(';') PORT_CHAR(':') PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("L") PORT_CODE(KEYCODE_L) PORT_CHAR('L') PORT_CHAR('l') PORT_CHAR(13) PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("P") PORT_CODE(KEYCODE_P) PORT_CHAR('P') PORT_CHAR('p') PORT_CHAR(16) PORT_START("KEY.1") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("- _") PORT_CODE(KEYCODE_MINUS) PORT_CHAR('-') PORT_CHAR('_') PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Tab") PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_CHAR('(') PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("[ ]") PORT_CODE(KEYCODE_OPENBRACE) PORT_CHAR('[') PORT_CHAR(']') PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Delete") PORT_CODE(KEYCODE_DEL) PORT_CHAR(127) PORT_CHAR('_') PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("\' \"") PORT_CODE(KEYCODE_QUOTE) PORT_CHAR('\'') PORT_CHAR('"') PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("I") PORT_CODE(KEYCODE_I) PORT_CHAR('I') PORT_CHAR('i') PORT_CHAR(9) PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("K") PORT_CODE(KEYCODE_K) PORT_CHAR('K') PORT_CHAR('k') PORT_CHAR(11) PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("O") PORT_CODE(KEYCODE_O) PORT_CHAR('O') PORT_CHAR('o') PORT_CHAR(15) PORT_START("KEY.2") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("5 %") PORT_CODE(KEYCODE_5) PORT_CHAR('5') PORT_CHAR('%') PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("8 *") PORT_CODE(KEYCODE_8) PORT_CHAR('8') PORT_CHAR('*') PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("6 ^") PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_CHAR('^') PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("` ~") PORT_CODE(KEYCODE_TILDE) PORT_CHAR('`') PORT_CHAR('~') PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("/ ?") PORT_CODE(KEYCODE_SLASH) PORT_CHAR('/') PORT_CHAR('?') PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("J") PORT_CODE(KEYCODE_J) PORT_CHAR('J') PORT_CHAR('j') PORT_CHAR(10) PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("U") PORT_CODE(KEYCODE_U) PORT_CHAR('U') PORT_CHAR('u') PORT_CHAR(21) PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("G") PORT_CODE(KEYCODE_G) PORT_CHAR('G') PORT_CHAR('g') PORT_CHAR(7) PORT_START("KEY.3") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("T") PORT_CODE(KEYCODE_T) PORT_CHAR('T') PORT_CHAR('t') PORT_CHAR(20) PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("7 &") PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_CHAR('&') PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("4 $") PORT_CODE(KEYCODE_4) PORT_CHAR('4') PORT_CHAR('$') PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_UNUSED ) // outputs a space PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("ShiftR") PORT_NAME("ShiftR") PORT_CODE(KEYCODE_RSHIFT) PORT_CHAR(UCHAR_SHIFT_1) PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME(". >") PORT_CODE(KEYCODE_STOP) PORT_CHAR('.') PORT_CHAR('>') PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("H") PORT_CODE(KEYCODE_H) PORT_CHAR('H') PORT_CHAR('h') PORT_CHAR(8) PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Y") PORT_CODE(KEYCODE_Y) PORT_CHAR('Y') PORT_CHAR('y') PORT_CHAR(25) PORT_START("KEY.4") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("R") PORT_CODE(KEYCODE_R) PORT_CHAR('R') PORT_CHAR('r') PORT_CHAR(18) PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("W") PORT_CODE(KEYCODE_W) PORT_CHAR('W') PORT_CHAR('w') PORT_CHAR(23) PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("2") PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_CHAR('@') PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("3") PORT_CODE(KEYCODE_3) PORT_CHAR('3') PORT_CHAR('#') PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNUSED ) // outputs a space PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME(", <") PORT_CODE(KEYCODE_COMMA) PORT_CHAR(',') PORT_CHAR('<') PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("C") PORT_CODE(KEYCODE_C) PORT_CHAR('C') PORT_CHAR('c') PORT_CHAR(3) PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("F") PORT_CODE(KEYCODE_F) PORT_CHAR('F') PORT_CHAR('f') PORT_CHAR(6) PORT_START("KEY.5") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("E") PORT_CODE(KEYCODE_E) PORT_CHAR('E') PORT_CHAR('e') PORT_CHAR(5) PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Q") PORT_CODE(KEYCODE_Q) PORT_CHAR('Q') PORT_CHAR('q') PORT_CHAR(17) PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_UNUSED ) // REPEAT key which is disconnected - outputs a space PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("1 !") PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_CHAR('!') PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("LineFeed") PORT_CODE(KEYCODE_ENTER_PAD) PORT_CHAR(10) PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("M") PORT_CODE(KEYCODE_M) PORT_CHAR('M') PORT_CHAR('m') PORT_CHAR(13) PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("D") PORT_CODE(KEYCODE_D) PORT_CHAR('D') PORT_CHAR('d') PORT_CHAR(4) PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("N") PORT_CODE(KEYCODE_N) PORT_CHAR('N') PORT_CHAR('n') PORT_CHAR(14) PORT_START("KEY.6") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("V") PORT_CODE(KEYCODE_V) PORT_CHAR('V') PORT_CHAR('v') PORT_CHAR(22) PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("A") PORT_CODE(KEYCODE_A) PORT_CHAR('A') PORT_CHAR('a') PORT_CHAR(1) PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Tab") PORT_CODE(KEYCODE_TAB) PORT_CHAR(9) PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Esc") PORT_CODE(KEYCODE_ESC) PORT_CHAR(27) PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Space") PORT_CODE(KEYCODE_SPACE) PORT_CHAR(' ') PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Return") PORT_CODE(KEYCODE_ENTER) PORT_CHAR(13) PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("X") PORT_CODE(KEYCODE_X) PORT_CHAR('X') PORT_CHAR('x') PORT_CHAR(24) PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("BlankL") PORT_CODE(KEYCODE_0_PAD) PORT_CHAR(16) PORT_START("KEY.7") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("B") PORT_CODE(KEYCODE_B) PORT_CHAR('B') PORT_CHAR('b') PORT_CHAR(2) PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("S") PORT_CODE(KEYCODE_S) PORT_CHAR('S') PORT_CHAR('s') PORT_CHAR(19) PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("CapsLock") PORT_CODE(KEYCODE_CAPSLOCK) PORT_CHAR(19) PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("CTRL") PORT_CODE(KEYCODE_LCONTROL) PORT_CODE(KEYCODE_RCONTROL) PORT_CHAR(UCHAR_SHIFT_2) PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("ShiftL") PORT_CODE(KEYCODE_LSHIFT) PORT_CHAR(UCHAR_SHIFT_1) PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("BlankR") PORT_CODE(KEYCODE_DEL_PAD) PORT_CHAR(21) PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Z") PORT_CODE(KEYCODE_Z) PORT_CHAR('Z') PORT_CHAR('z') PORT_CHAR(26) PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("{ }") PORT_CODE(KEYCODE_CLOSEBRACE) PORT_CHAR('{') PORT_CHAR('}') INPUT_PORTS_END void pegasus_state::video_start() { m_p_chargen = memregion("chargen")->base(); } static const UINT8 mcm6571a_shift[] = { 0,1,1,0,0,0,1,0,0,0,0,1,0,0,0,0, 1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,1,0,0,1,0,0,0,0,0, 1,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0 }; UINT32 pegasus_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { UINT8 y,ra,chr,gfx,inv; UINT16 sy=0,ma=0,x; bool pcg_mode = BIT(m_control_bits, 1); for(y = 0; y < 16; y++ ) { for(ra = 0; ra < 16; ra++ ) { UINT16 *p = &bitmap.pix16(sy++); for(x = ma; x < ma + 32; x++ ) { inv = 0xff; chr = m_p_videoram[x]; if (BIT(chr, 7)) { inv = 0; chr &= 0x7f; } if (pcg_mode) { gfx = m_p_pcgram[(chr << 4) | ra] ^ inv; } else if (mcm6571a_shift[chr]) { if (ra < 3) gfx = inv; else gfx = m_p_chargen[(chr<<4) | (ra-3) ] ^ inv; } else { if (ra < 10) gfx = m_p_chargen[(chr<<4) | ra ] ^ inv; else gfx = inv; } /* Display a scanline of a character */ *p++ = BIT(gfx, 7); *p++ = BIT(gfx, 6); *p++ = BIT(gfx, 5); *p++ = BIT(gfx, 4); *p++ = BIT(gfx, 3); *p++ = BIT(gfx, 2); *p++ = BIT(gfx, 1); *p++ = BIT(gfx, 0); } } ma+=32; } return 0; } /* F4 Character Displayer */ static const gfx_layout pegasus_charlayout = { 8, 16, /* text = 7 x 9, pcg = 8 x 16 */ 128, /* 128 characters */ 1, /* 1 bits per pixel */ { 0 }, /* no bitplanes */ /* x offsets */ { 0, 1, 2, 3, 4, 5, 6, 7 }, /* y offsets */ { 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 }, 8*16 /* every char takes 16 bytes */ }; static GFXDECODE_START( pegasus ) GFXDECODE_ENTRY( "chargen", 0x0000, pegasus_charlayout, 0, 1 ) GFXDECODE_ENTRY( "pcg", 0x0000, pegasus_charlayout, 0, 1 ) GFXDECODE_END // An encrypted single rom starts with 02, decrypted with 20. // The 2nd and 3rd part of a multi-rom set will have no obvious byte, // so we check the first 4 bytes for a signature, and decrypt if found. void pegasus_state::pegasus_decrypt_rom(UINT8 *ROM) { bool doit = FALSE; UINT8 b; UINT16 j; dynamic_buffer temp_copy; temp_copy.resize(0x1000); if (ROM[0] == 0x02) doit = TRUE; if (ROM[0] == 0x1e && ROM[1] == 0xfa && ROM[2] == 0x60 && ROM[3] == 0x71) doit = TRUE; // xbasic 2nd rom if (ROM[0] == 0x72 && ROM[1] == 0x62 && ROM[2] == 0xc6 && ROM[3] == 0x36) doit = TRUE; // xbasic 3rd rom if (ROM[0] == 0xf0 && ROM[1] == 0x40 && ROM[2] == 0xce && ROM[3] == 0x80) doit = TRUE; // forth 2nd rom (both sets) if (ROM[0] == 0x80 && ROM[1] == 0x06 && ROM[2] == 0x68 && ROM[3] == 0x14) doit = TRUE; // pascal 2nd rom if (doit) { for (int i = 0; i < 0x1000; i++) { b = ROM[i]; j = BITSWAP16(i, 15, 14, 13, 12, 11, 10, 9, 8, 0, 1, 2, 3, 4, 5, 6, 7); b = BITSWAP8(b, 3, 2, 1, 0, 7, 6, 5, 4); temp_copy[j & 0xfff] = b; } memcpy(ROM, &temp_copy[0], 0x1000); } } int pegasus_state::load_cart(device_image_interface &image, generic_slot_device *slot, const char *reg_tag) { UINT32 size = slot->common_get_size(reg_tag); bool any_socket = false; if (size > 0x1000) { image.seterror(IMAGE_ERROR_UNSPECIFIED, "Unsupported cartridge size"); return IMAGE_INIT_FAIL; } if (image.software_entry() != nullptr && size == 0) { // we might be loading a cart compatible with all sockets! // so try to get region "rom" size = slot->common_get_size("rom"); any_socket = true; if (size == 0) { std::string errmsg = string_format( "Attempted to load a file that does not work in this socket.\n" "Please check \"Usage\" field in the software list for the correct socket(s) to use."); image.seterror(IMAGE_ERROR_UNSPECIFIED, errmsg.c_str()); return IMAGE_INIT_FAIL; } } slot->rom_alloc(0x1000, GENERIC_ROM8_WIDTH, ENDIANNESS_LITTLE); // we alloc 0x1000 also for smaller roms! slot->common_load_rom(slot->get_rom_base(), size, any_socket ? "rom" : reg_tag); // raw images have to be decrypted (in particular the ones from softlist) pegasus_decrypt_rom(slot->get_rom_base()); return IMAGE_INIT_PASS; } void pegasus_state::machine_start() { m_p_pcgram = memregion("pcg")->base(); if (m_exp_00->exists()) m_maincpu->space(AS_PROGRAM).install_read_handler(0x0000, 0x0fff, read8_delegate(FUNC(generic_slot_device::read_rom),(generic_slot_device*)m_exp_00)); if (m_exp_01->exists()) m_maincpu->space(AS_PROGRAM).install_read_handler(0x1000, 0x1fff, read8_delegate(FUNC(generic_slot_device::read_rom),(generic_slot_device*)m_exp_01)); if (m_exp_02->exists()) m_maincpu->space(AS_PROGRAM).install_read_handler(0x2000, 0x2fff, read8_delegate(FUNC(generic_slot_device::read_rom),(generic_slot_device*)m_exp_02)); if (m_exp_0c->exists()) m_maincpu->space(AS_PROGRAM).install_read_handler(0xc000, 0xcfff, read8_delegate(FUNC(generic_slot_device::read_rom),(generic_slot_device*)m_exp_0c)); if (m_exp_0d->exists()) m_maincpu->space(AS_PROGRAM).install_read_handler(0xd000, 0xdfff, read8_delegate(FUNC(generic_slot_device::read_rom),(generic_slot_device*)m_exp_0d)); } void pegasus_state::machine_reset() { m_kbd_row = 0; m_kbd_irq = 1; m_control_bits = 0; } DRIVER_INIT_MEMBER(pegasus_state, pegasus) { // decrypt monitor UINT8 *base = memregion("maincpu")->base() + 0xf000; pegasus_decrypt_rom(base); } static MACHINE_CONFIG_START( pegasus, pegasus_state ) /* basic machine hardware */ MCFG_CPU_ADD("maincpu", M6809E, XTAL_4MHz) // actually a 6809C - 4MHZ clock coming in, 1MHZ internally MCFG_CPU_PROGRAM_MAP(pegasus_mem) MCFG_TIMER_DRIVER_ADD_PERIODIC("pegasus_firq", pegasus_state, pegasus_firq, attotime::from_hz(400)) /* video hardware */ MCFG_SCREEN_ADD("screen", RASTER) MCFG_SCREEN_REFRESH_RATE(50) MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) /* not accurate */ MCFG_SCREEN_UPDATE_DRIVER(pegasus_state, screen_update) MCFG_SCREEN_SIZE(32*8, 16*16) MCFG_SCREEN_VISIBLE_AREA(0, 32*8-1, 0, 16*16-1) MCFG_SCREEN_PALETTE("palette") MCFG_GFXDECODE_ADD("gfxdecode", "palette", pegasus) MCFG_PALETTE_ADD_MONOCHROME("palette") /* sound hardware */ MCFG_SPEAKER_STANDARD_MONO("mono") MCFG_SOUND_WAVE_ADD(WAVE_TAG, "cassette") MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.05) /* devices */ MCFG_DEVICE_ADD("pia_s", PIA6821, 0) MCFG_PIA_READPB_HANDLER(READ8(pegasus_state, pegasus_keyboard_r)) MCFG_PIA_READCA1_HANDLER(READLINE(pegasus_state, pegasus_cassette_r)) MCFG_PIA_READCB1_HANDLER(READLINE(pegasus_state, pegasus_keyboard_irq)) MCFG_PIA_WRITEPA_HANDLER(WRITE8(pegasus_state, pegasus_keyboard_w)) MCFG_PIA_WRITEPB_HANDLER(WRITE8(pegasus_state, pegasus_controls_w)) MCFG_PIA_CA2_HANDLER(WRITELINE(pegasus_state, pegasus_cassette_w)) MCFG_PIA_CB2_HANDLER(WRITELINE(pegasus_state, pegasus_firq_clr)) MCFG_PIA_IRQA_HANDLER(DEVWRITELINE("maincpu", m6809e_device, irq_line)) MCFG_PIA_IRQB_HANDLER(DEVWRITELINE("maincpu", m6809e_device, irq_line)) MCFG_DEVICE_ADD("pia_u", PIA6821, 0) MCFG_PIA_IRQA_HANDLER(DEVWRITELINE("maincpu", m6809e_device, irq_line)) MCFG_PIA_IRQB_HANDLER(DEVWRITELINE("maincpu", m6809e_device, irq_line)) MCFG_GENERIC_SOCKET_ADD("exp00", generic_plain_slot, "pegasus_cart") MCFG_GENERIC_LOAD(pegasus_state, exp00_load) MCFG_GENERIC_SOCKET_ADD("exp01", generic_plain_slot, "pegasus_cart") MCFG_GENERIC_LOAD(pegasus_state, exp01_load) MCFG_GENERIC_SOCKET_ADD("exp02", generic_plain_slot, "pegasus_cart") MCFG_GENERIC_LOAD(pegasus_state, exp02_load) MCFG_GENERIC_SOCKET_ADD("exp0c", generic_plain_slot, "pegasus_cart") MCFG_GENERIC_LOAD(pegasus_state, exp0c_load) MCFG_GENERIC_SOCKET_ADD("exp0d", generic_plain_slot, "pegasus_cart") MCFG_GENERIC_LOAD(pegasus_state, exp0d_load) MCFG_CASSETTE_ADD("cassette") MCFG_CASSETTE_DEFAULT_STATE(CASSETTE_STOPPED|CASSETTE_MOTOR_ENABLED) /* Software lists */ MCFG_SOFTWARE_LIST_ADD("cart_list", "pegasus_cart") MACHINE_CONFIG_END static MACHINE_CONFIG_DERIVED( pegasusm, pegasus ) MCFG_CPU_MODIFY( "maincpu" ) MCFG_CPU_PROGRAM_MAP(pegasusm_mem) MACHINE_CONFIG_END /* ROM definition */ ROM_START( pegasus ) ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF ) ROM_SYSTEM_BIOS(0, "11r2674", "Monitor 1.1 r2674") ROMX_LOAD( "mon11_2674.bin", 0xf000, 0x1000, CRC(1640ff7e) SHA1(8199643749fb40fb8be05e9f311c75620ca939b1), ROM_BIOS(1) ) ROM_SYSTEM_BIOS(1, "10r2569", "Monitor 1.0 r2569") ROMX_LOAD( "mon10_2569.bin", 0xf000, 0x1000, CRC(910fc930) SHA1(a4f6bbe5def0268cc49ee7045616a39017dd8052), ROM_BIOS(2) ) ROM_SYSTEM_BIOS(2, "11r2569", "Monitor 1.1 r2569") ROMX_LOAD( "mon11_2569.bin", 0xf000, 0x1000, CRC(07b92002) SHA1(3c434601120870c888944ecd9ade5186432ddbc2), ROM_BIOS(3) ) ROM_SYSTEM_BIOS(3, "11r2669", "Monitor 1.1 r2669") ROMX_LOAD( "mon11_2669.bin", 0xf000, 0x1000, CRC(f3ee23c8) SHA1(3ac96935668f5e53799c90db5140393c2ef9ce36), ROM_BIOS(4) ) ROM_SYSTEM_BIOS(4, "22r2856", "Monitor 2.2 r2856") ROMX_LOAD( "mon22_2856.bin", 0xf000, 0x1000, CRC(5f5f688a) SHA1(3719eecc347e158dd027ea7aa8a068cdafc00d9b), ROM_BIOS(5) ) ROM_SYSTEM_BIOS(5, "22br2856", "Monitor 2.2B r2856") ROMX_LOAD( "mon22b_2856.bin", 0xf000, 0x1000, CRC(a47b0308) SHA1(f215e51aa8df6aed99c10f3df6a3589cb9f63d46), ROM_BIOS(6) ) ROM_SYSTEM_BIOS(6, "23r2601", "Monitor 2.3 r2601") ROMX_LOAD( "mon23_2601.bin", 0xf000, 0x1000, CRC(0e024222) SHA1(9950cba08996931b9d5a3368b44c7309638b4e08), ROM_BIOS(7) ) ROM_SYSTEM_BIOS(7, "23ar2569", "Monitor 2.3A r2569") ROMX_LOAD( "mon23a_2569.bin", 0xf000, 0x1000, CRC(248e62c9) SHA1(adbde27e69b38b29ff89bacf28d0240a8e5d90f3), ROM_BIOS(8) ) ROM_REGION( 0x800, "chargen", 0 ) ROM_LOAD( "6571.bin", 0x0000, 0x0800, CRC(5a25144b) SHA1(7b9fee0c8ef2605b85d12b6d9fe8feb82418c63a) ) ROM_REGION( 0x800, "pcg", ROMREGION_ERASEFF ) ROM_END #define rom_pegasusm rom_pegasus /* Driver */ /* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME FLAGS */ COMP( 1981, pegasus, 0, 0, pegasus, pegasus, pegasus_state, pegasus, "Technosys", "Aamber Pegasus", MACHINE_NO_SOUND_HW ) COMP( 1981, pegasusm, pegasus, 0, pegasusm, pegasus, pegasus_state, pegasus, "Technosys", "Aamber Pegasus with RAM expansion unit", MACHINE_NO_SOUND_HW )