/*************************************************************************** Osborne-1 driver file The Osborne-1 memory is divided into 3 "banks". Bank 1 simply consists of 64KB of RAM. The upper 4KB is used for the lower 8 bit of video RAM entries. Bank 2 holds the BIOS ROM and I/O area. Only addresses 0000-3FFF are used by bank 2. Bank 2 is divided as follows: 3000-3FFF Unused 2C00-2C03 Video PIA 2A00-2A01 Serial interface 2900-2903 488 PIA 2201-2280 Keyboard 2100-2103 Floppy 1000-1FFF Unused 0000-0FFF BIOS ROM Bank 3 has the ninth bit needed to complete the full Video RAM. These bits are stored at F000-FFFF. Only the highest bit is used. On bootup bank 2 is active. The actual banking is done through I/O ports 00-03. 00 - Have both bank 2 and bank 1 active. This seems to be the power up default. 01 - Only have bank 1 active. 02 - Have both bank 2 and bank 3 active. (Not 100% sure, also bank 1 from 4000-EFFF?) 03 - Have both bank 2 and bank 1 active. TODO: - Verify frequency of the beep/audio alarm. ***************************************************************************/ #include "includes/osborne1.h" #define MAIN_CLOCK 15974400 static ADDRESS_MAP_START( osborne1_mem, AS_PROGRAM, 8, osborne1_state ) AM_RANGE( 0x0000, 0x0FFF ) AM_READ_BANK("bank1") AM_WRITE( osborne1_0000_w ) AM_RANGE( 0x1000, 0x1FFF ) AM_READ_BANK("bank2") AM_WRITE( osborne1_1000_w ) AM_RANGE( 0x2000, 0x2FFF ) AM_READWRITE( osborne1_2000_r, osborne1_2000_w ) AM_RANGE( 0x3000, 0x3FFF ) AM_READ_BANK("bank3") AM_WRITE( osborne1_3000_w ) AM_RANGE( 0x4000, 0xEFFF ) AM_RAM AM_RANGE( 0xF000, 0xFFFF ) AM_READ_BANK("bank4") AM_WRITE( osborne1_videoram_w ) ADDRESS_MAP_END static ADDRESS_MAP_START( osborne1_io, AS_IO, 8, osborne1_state ) ADDRESS_MAP_UNMAP_HIGH ADDRESS_MAP_GLOBAL_MASK(0xff) AM_RANGE( 0x00, 0x03 ) AM_WRITE( osborne1_bankswitch_w ) ADDRESS_MAP_END static INPUT_PORTS_START( osborne1 ) PORT_START("ROW0") PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_BACKSLASH) PORT_CHAR('[') PORT_CHAR(']') PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_CLOSEBRACE) PORT_CHAR('\'') PORT_CHAR('"') PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Return") PORT_CODE(KEYCODE_ENTER) PORT_CHAR(13) PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_RSHIFT) PORT_CODE(KEYCODE_LSHIFT) PORT_CHAR(UCHAR_SHIFT_1) PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_UNUSED) PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_LCONTROL) PORT_CODE(KEYCODE_RCONTROL) PORT_CHAR(UCHAR_SHIFT_2) PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_TAB) PORT_CHAR('\t') PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_ESC) PORT_CHAR(UCHAR_MAMEKEY(ESC)) PORT_START("ROW1") PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_8) PORT_CHAR('8') PORT_CHAR('*') PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_CHAR('&') PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_CHAR('^') PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_5) PORT_CHAR('5') PORT_CHAR('%') PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_4) PORT_CHAR('4') PORT_CHAR('$') PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_3) PORT_CHAR('3') PORT_CHAR('#') PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_CHAR('@') PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_CHAR('!') PORT_START("ROW2") PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_CHAR('(') PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_O) PORT_CHAR('o') PORT_CHAR('O') PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_P) PORT_CHAR('p') PORT_CHAR('P') PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_STOP) PORT_CHAR('.') PORT_CHAR('>') PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_SPACE) PORT_CHAR(' ') PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_0) PORT_CHAR('0') PORT_CHAR(')') PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_LEFT) PORT_CHAR(UCHAR_MAMEKEY(LEFT)) PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_UP) PORT_CHAR(UCHAR_MAMEKEY(UP)) PORT_START("ROW3") PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_I) PORT_CHAR('i') PORT_CHAR('I') PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_U) PORT_CHAR('u') PORT_CHAR('U') PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_Y) PORT_CHAR('y') PORT_CHAR('Y') PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_T) PORT_CHAR('t') PORT_CHAR('T') PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_R) PORT_CHAR('r') PORT_CHAR('R') PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_E) PORT_CHAR('e') PORT_CHAR('E') PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_W) PORT_CHAR('w') PORT_CHAR('W') PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_Q) PORT_CHAR('q') PORT_CHAR('Q') PORT_START("ROW4") PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_K) PORT_CHAR('k') PORT_CHAR('K') PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_J) PORT_CHAR('j') PORT_CHAR('J') PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_H) PORT_CHAR('h') PORT_CHAR('H') PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_G) PORT_CHAR('g') PORT_CHAR('G') PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_F) PORT_CHAR('f') PORT_CHAR('F') PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_D) PORT_CHAR('d') PORT_CHAR('D') PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_S) PORT_CHAR('s') PORT_CHAR('S') PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_A) PORT_CHAR('a') PORT_CHAR('A') PORT_START("ROW5") PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_COMMA) PORT_CHAR(',') PORT_CHAR('<') PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_M) PORT_CHAR('m') PORT_CHAR('M') PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_N) PORT_CHAR('n') PORT_CHAR('N') PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_B) PORT_CHAR('b') PORT_CHAR('B') PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_V) PORT_CHAR('v') PORT_CHAR('V') PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_C) PORT_CHAR('c') PORT_CHAR('C') PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_X) PORT_CHAR('x') PORT_CHAR('X') PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_Z) PORT_CHAR('z') PORT_CHAR('Z') PORT_START("ROW6") PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_EQUALS) PORT_CHAR('=') PORT_CHAR('+') PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_L) PORT_CHAR('l') PORT_CHAR('L') PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_OPENBRACE) PORT_CHAR('\\') PORT_CHAR('|') PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_COLON) PORT_CHAR(';') PORT_CHAR(':') PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_SLASH) PORT_CHAR('/') PORT_CHAR('?') PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_MINUS) PORT_CHAR('-') PORT_CHAR('_') PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_DOWN) PORT_CHAR(UCHAR_MAMEKEY(DOWN)) PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_RIGHT) PORT_CHAR(UCHAR_MAMEKEY(RIGHT)) PORT_START("ROW7") PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_UNUSED) PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_UNUSED) PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNUSED) PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_UNUSED) PORT_DIPNAME( 0x08, 0, "Alpha Lock" ) PORT_CODE(KEYCODE_CAPSLOCK) PORT_TOGGLE PORT_CHAR(UCHAR_MAMEKEY(CAPSLOCK)) PORT_DIPSETTING( 0x08, DEF_STR( Off ) ) PORT_DIPSETTING( 0x00, DEF_STR( On ) ) PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_UNUSED) PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNUSED) PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNUSED) INPUT_PORTS_END PALETTE_INIT_MEMBER(osborne1_state, osborne1) { palette.set_pen_color( 0, 0, 0, 0 ); /* Black */ palette.set_pen_color( 1, 0, 255, 0 ); /* Full */ palette.set_pen_color( 2, 0, 128, 0 ); /* Dimmed */ } static const z80_daisy_config osborne1_daisy_chain[] = { /* { osborne1_z80_reset, osborne1_z80_irq_state, osborne1_z80_irq_ack, osborne1_z80_irq_reti, 0 }, */ { "osborne1_daisy" }, { NULL } }; /* * The Osborne-1 supports the following disc formats: * - Osborne single density: 40 tracks, 10 sectors per track, 256-byte sectors (100 KByte) * - Osborne double density: 40 tracks, 5 sectors per track, 1024-byte sectors (200 KByte) * - IBM Personal Computer: 40 tracks, 8 sectors per track, 512-byte sectors (160 KByte) * - Xerox 820 Computer: 40 tracks, 18 sectors per track, 128-byte sectors (90 KByte) * - DEC 1820 double density: 40 tracks, 9 sectors per track, 512-byte sectors (180 KByte) * */ static LEGACY_FLOPPY_OPTIONS_START(osborne1 ) LEGACY_FLOPPY_OPTION( osd, "img", "Osborne single density", basicdsk_identify_default, basicdsk_construct_default, NULL, HEADS([1]) TRACKS([40]) SECTORS([10]) SECTOR_LENGTH([256]) FIRST_SECTOR_ID([1])) LEGACY_FLOPPY_OPTION( odd, "img", "Osborne double density", basicdsk_identify_default, basicdsk_construct_default, NULL, HEADS([1]) TRACKS([40]) SECTORS([5]) SECTOR_LENGTH([1024]) FIRST_SECTOR_ID([1])) LEGACY_FLOPPY_OPTION( ibm, "img", "IBM Personal Computer", basicdsk_identify_default, basicdsk_construct_default, NULL, HEADS([1]) TRACKS([40]) SECTORS([8]) SECTOR_LENGTH([512]) FIRST_SECTOR_ID([1])) LEGACY_FLOPPY_OPTION( xerox, "img", "Xerox 820 Computer", basicdsk_identify_default, basicdsk_construct_default, NULL, HEADS([1]) TRACKS([40]) SECTORS([18]) SECTOR_LENGTH([128]) FIRST_SECTOR_ID([1])) LEGACY_FLOPPY_OPTION( dec, "img", "DEC 1820 double density", basicdsk_identify_default, basicdsk_construct_default, NULL, HEADS([1]) TRACKS([40]) SECTORS([9]) SECTOR_LENGTH([512]) FIRST_SECTOR_ID([1])) LEGACY_FLOPPY_OPTIONS_END static const floppy_interface osborne1_floppy_interface = { DEVCB_NULL, DEVCB_NULL, DEVCB_NULL, DEVCB_NULL, DEVCB_NULL, FLOPPY_STANDARD_5_25_SSDD_40, LEGACY_FLOPPY_OPTIONS_NAME(osborne1), "floppy_5_25", NULL }; /* F4 Character Displayer */ static const gfx_layout osborne1_charlayout = { 8, 10, /* 8 x 10 characters */ 128, /* 128 characters */ 1, /* 1 bits per pixel */ { 0 }, /* no bitplanes */ /* x offsets */ { 0, 1, 2, 3, 4, 5, 6, 7 }, /* y offsets */ { 0*128*8, 1*128*8, 2*128*8, 3*128*8, 4*128*8, 5*128*8, 6*128*8, 7*128*8, 8*128*8, 9*128*8 }, 8 /* every char takes 16 x 1 bytes */ }; static GFXDECODE_START( osborne1 ) GFXDECODE_ENTRY( "chargen", 0x0000, osborne1_charlayout, 0, 1 ) GFXDECODE_END static MACHINE_CONFIG_START( osborne1, osborne1_state ) MCFG_CPU_ADD( "maincpu", Z80, MAIN_CLOCK/4 ) MCFG_CPU_PROGRAM_MAP( osborne1_mem) MCFG_CPU_IO_MAP( osborne1_io) MCFG_CPU_CONFIG( osborne1_daisy_chain ) MCFG_DEVICE_ADD( "osborne1_daisy", OSBORNE1_DAISY, 0 ) MCFG_SCREEN_ADD("screen", RASTER) MCFG_SCREEN_UPDATE_DRIVER(osborne1_state, screen_update) MCFG_SCREEN_RAW_PARAMS( MAIN_CLOCK/2, 512, 0, 416, 260, 0, 240 ) MCFG_SCREEN_PALETTE("palette") MCFG_GFXDECODE_ADD("gfxdecode", "palette", osborne1) MCFG_PALETTE_ADD( "palette", 3 ) MCFG_PALETTE_INIT_OWNER(osborne1_state, osborne1) MCFG_SPEAKER_STANDARD_MONO( "mono" ) MCFG_SOUND_ADD( "beeper", BEEP, 0 ) MCFG_SOUND_ROUTE( ALL_OUTPUTS, "mono", 1.00 ) MCFG_DEVICE_ADD("pia_0", PIA6821, 0) MCFG_PIA_READPA_HANDLER(DEVREAD8(IEEE488_TAG, ieee488_device, dio_r)) MCFG_PIA_READPB_HANDLER(READ8(osborne1_state, ieee_pia_pb_r)) MCFG_PIA_WRITEPA_HANDLER(DEVWRITE8(IEEE488_TAG, ieee488_device, dio_w)) MCFG_PIA_WRITEPB_HANDLER(WRITE8(osborne1_state, ieee_pia_pb_w)) MCFG_PIA_CA2_HANDLER(DEVWRITELINE(IEEE488_TAG, ieee488_device, ifc_w)) MCFG_PIA_CB2_HANDLER(DEVWRITELINE(IEEE488_TAG, ieee488_device, ren_w)) MCFG_PIA_IRQA_HANDLER(WRITELINE(osborne1_state, ieee_pia_irq_a_func)) MCFG_DEVICE_ADD( "pia_1", PIA6821, 0) MCFG_PIA_WRITEPA_HANDLER(WRITE8(osborne1_state, video_pia_port_a_w)) MCFG_PIA_WRITEPB_HANDLER(WRITE8(osborne1_state, video_pia_port_b_w)) MCFG_PIA_CB2_HANDLER(WRITELINE(osborne1_state, video_pia_out_cb2_dummy)) MCFG_PIA_IRQA_HANDLER(WRITELINE(osborne1_state, video_pia_irq_a_func)) MCFG_MB8877_ADD("mb8877", default_wd17xx_interface_2_drives ) MCFG_LEGACY_FLOPPY_2_DRIVES_ADD(osborne1_floppy_interface) MCFG_IEEE488_BUS_ADD() MCFG_IEEE488_SRQ_CALLBACK(DEVWRITELINE("pia_0", pia6821_device, ca2_w)) MCFG_SOFTWARE_LIST_ADD("flop_list","osborne1") /* internal ram */ MCFG_RAM_ADD(RAM_TAG) MCFG_RAM_DEFAULT_SIZE("68K") /* 64KB Main RAM and 4Kbit video attribute RAM */ MACHINE_CONFIG_END ROM_START( osborne1 ) ROM_REGION(0x1000, "maincpu", 0) ROM_SYSTEM_BIOS( 0, "ver144", "BIOS version 1.44" ) ROMX_LOAD( "3a10082-00rev-e.ud11", 0x0000, 0x1000, CRC(c0596b14) SHA1(ee6a9cc9be3ddc5949d3379351c1d58a175ce9ac), ROM_BIOS(1) ) ROM_SYSTEM_BIOS( 1, "verA", "BIOS version A" ) ROMX_LOAD( "osba.bin", 0x0000, 0x1000, NO_DUMP, ROM_BIOS(2) ) ROM_SYSTEM_BIOS( 2, "ver12", "BIOS version 1.2" ) ROMX_LOAD( "osb12.bin", 0x0000, 0x1000, NO_DUMP, ROM_BIOS(3) ) ROM_SYSTEM_BIOS( 3, "ver121", "BIOS version 1.2.1" ) ROMX_LOAD( "osb121.bin", 0x0000, 0x1000, NO_DUMP, ROM_BIOS(4) ) ROM_SYSTEM_BIOS( 4, "ver13", "BIOS version 1.3" ) ROMX_LOAD( "osb13.bin", 0x0000, 0x1000, NO_DUMP, ROM_BIOS(5) ) ROM_SYSTEM_BIOS( 5, "ver14", "BISO version 1.4" ) ROMX_LOAD( "rev1.40.ud11", 0x0000, 0x1000, CRC(3D966335) SHA1(0c60b97a3154a75868efc6370d26995eadc7d927), ROM_BIOS(6) ) ROM_SYSTEM_BIOS( 6, "ver143", "BIOS version 1.43" ) ROMX_LOAD( "rev1.43.ud11", 0x0000, 0x1000, CRC(91A48E3C) SHA1(c37b83f278d21e6e92d80f9c057b11f7f22d88d4), ROM_BIOS(7) ) ROM_REGION( 0x800, "chargen", 0 ) ROM_LOAD( "7a3007-00.ud15", 0x0000, 0x800, CRC(6c1eab0d) SHA1(b04459d377a70abc9155a5486003cb795342c801) ) //ROM_LOAD( "char.ua15", 0x0000, 0x800, CRC(5297C109) SHA1(e1a59d87edd66e6c226102cb0688e9cb74dbb594) ) // this is CHRROM from v1.4 BIOS MB. I don't know how to hook up diff CHR to ROM_BIOS(6) ROM_END /* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME FLAGS */ COMP( 1981, osborne1, 0, 0, osborne1, osborne1, osborne1_state, osborne1, "Osborne", "Osborne-1", 0 )