/*
Corvus Concept driver
Relatively simple 68k-based system
* 256 or 512 kbytes of DRAM
* 4kbytes of SRAM
* 8kbyte boot ROM
* optional MacsBugs ROM
* two serial ports, keyboard, bitmapped display, simple sound, omninet
LAN port (seems more or less similar to AppleTalk)
* 4 expansion ports enable to add expansion cards, namely floppy disk
and hard disk controllers (the expansion ports are partially compatible
with Apple 2 expansion ports)
Video: monochrome bitmapped display, 720*560 visible area (bitmaps are 768
pixels wide in memory). One interesting feature is the fact that the
monitor can be rotated to give a 560*720 vertical display (you need to
throw a switch and reset the machine for the display rotation to be taken
into account, though). One oddity is that the video hardware scans the
display from the lower-left corner to the upper-left corner (or from the
upper-right corner to the lower-left if the screen is flipped).
Sound: simpler buzzer connected to the via shift register
Keyboard: intelligent controller, connected through an ACIA. See CCOS
manual pp. 76 through 78. and User Guide p. 2-1 through 2-9.
Clock: mm58174 RTC
Raphael Nabet, Brett Wyer, 2003-2005
*/
#include "emu.h"
#include "cpu/m68000/m68000.h"
#include "includes/concept.h"
static ADDRESS_MAP_START(concept_memmap, AS_PROGRAM, 16, concept_state )
AM_RANGE(0x000000, 0x000007) AM_ROM AM_REGION("maincpu", 0x010000) /* boot ROM mirror */
AM_RANGE(0x000008, 0x000fff) AM_RAM /* static RAM */
AM_RANGE(0x010000, 0x011fff) AM_ROM AM_REGION("maincpu", 0x010000) /* boot ROM */
AM_RANGE(0x020000, 0x021fff) AM_ROM /* macsbugs ROM (optional) */
AM_RANGE(0x030000, 0x03ffff) AM_READWRITE(concept_io_r,concept_io_w) /* I/O space */
AM_RANGE(0x080000, 0x0fffff) AM_RAM AM_SHARE("videoram")/* AM_RAMBANK(2) */ /* DRAM */
ADDRESS_MAP_END
static INPUT_PORTS_START( concept )
PORT_START("KEY0") /* port 0: keys 0x00 through 0x0f */
PORT_BIT(0x0001, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("(right)") PORT_CODE(KEYCODE_RIGHT)
PORT_BIT(0x0002, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("3") PORT_CODE(KEYCODE_3_PAD)
PORT_BIT(0x0004, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("9") PORT_CODE(KEYCODE_9_PAD)
PORT_BIT(0x0008, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("HOME") PORT_CODE(KEYCODE_HOME)
PORT_BIT(0x0010, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("6") PORT_CODE(KEYCODE_6_PAD)
PORT_BIT(0x0020, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME(",") PORT_CODE(KEYCODE_PLUS_PAD)
PORT_BIT(0x0040, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("-") PORT_CODE(KEYCODE_MINUS_PAD)
PORT_BIT(0x0080, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("ENTER") PORT_CODE(KEYCODE_ENTER_PAD)
PORT_BIT(0x0100, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("(left)") PORT_CODE(KEYCODE_LEFT)
PORT_BIT(0x0200, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("1") PORT_CODE(KEYCODE_1_PAD)
PORT_BIT(0x0400, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("7") PORT_CODE(KEYCODE_7_PAD)
PORT_BIT(0x0800, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("(down)") PORT_CODE(KEYCODE_DOWN)
PORT_BIT(0x1000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("4") PORT_CODE(KEYCODE_4_PAD)
PORT_BIT(0x2000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("8") PORT_CODE(KEYCODE_8_PAD)
PORT_BIT(0x4000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("5") PORT_CODE(KEYCODE_5_PAD)
PORT_BIT(0x8000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("2") PORT_CODE(KEYCODE_2_PAD)
PORT_START("KEY1") /* port 1: keys 0x10 through 0x1f */
PORT_BIT(0x0001, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("= +") PORT_CODE(KEYCODE_EQUALS)
PORT_BIT(0x0004, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("[ {") PORT_CODE(KEYCODE_OPENBRACE)
PORT_BIT(0x0008, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("BACKSPACE") PORT_CODE(KEYCODE_BACKSPACE)
PORT_BIT(0x0010, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("ENTER") PORT_CODE(KEYCODE_ENTER)
PORT_BIT(0x0020, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("] }") PORT_CODE(KEYCODE_CLOSEBRACE)
PORT_BIT(0x0040, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("\\ |") PORT_CODE(KEYCODE_BACKSLASH)
PORT_BIT(0x0100, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("0 )") PORT_CODE(KEYCODE_0)
PORT_BIT(0x0200, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("/ ?") PORT_CODE(KEYCODE_SLASH)
PORT_BIT(0x0400, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("P") PORT_CODE(KEYCODE_P)
PORT_BIT(0x0800, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("- _") PORT_CODE(KEYCODE_MINUS)
PORT_BIT(0x1000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("; :") PORT_CODE(KEYCODE_COLON)
PORT_BIT(0x2000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("` ~") PORT_CODE(KEYCODE_BACKSLASH2)
PORT_BIT(0x4000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("' \"") PORT_CODE(KEYCODE_QUOTE)
PORT_BIT(0x8000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("SHIFT (r)") PORT_CODE(KEYCODE_RSHIFT)
PORT_START("KEY2") /* port 2: keys 0x20 through 0x2f */
PORT_BIT(0x0001, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("F1") PORT_CODE(KEYCODE_F1)
PORT_BIT(0x0002, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("F2") PORT_CODE(KEYCODE_F2)
PORT_BIT(0x0004, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("F3") PORT_CODE(KEYCODE_F3)
PORT_BIT(0x0008, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("F4") PORT_CODE(KEYCODE_F4)
PORT_BIT(0x0010, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("F5") PORT_CODE(KEYCODE_F5)
PORT_BIT(0x0100, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("4 $") PORT_CODE(KEYCODE_4)
PORT_BIT(0x0200, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("5 %") PORT_CODE(KEYCODE_5)
PORT_BIT(0x0400, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("R") PORT_CODE(KEYCODE_R)
PORT_BIT(0x0800, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("T") PORT_CODE(KEYCODE_T)
PORT_BIT(0x1000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("F") PORT_CODE(KEYCODE_F)
PORT_BIT(0x2000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("G") PORT_CODE(KEYCODE_G)
PORT_BIT(0x4000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("V") PORT_CODE(KEYCODE_V)
PORT_BIT(0x8000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("B") PORT_CODE(KEYCODE_B)
PORT_START("KEY3") /* port 3: keys 0x30 through 0x3f */
PORT_BIT(0x0001, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("2 @") PORT_CODE(KEYCODE_2)
PORT_BIT(0x0002, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("3 #") PORT_CODE(KEYCODE_3)
PORT_BIT(0x0004, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("W") PORT_CODE(KEYCODE_W)
PORT_BIT(0x0008, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("E") PORT_CODE(KEYCODE_E)
PORT_BIT(0x0010, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("S") PORT_CODE(KEYCODE_S)
PORT_BIT(0x0020, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("D") PORT_CODE(KEYCODE_D)
PORT_BIT(0x0040, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("X") PORT_CODE(KEYCODE_X)
PORT_BIT(0x0080, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("C") PORT_CODE(KEYCODE_C)
PORT_BIT(0x0100, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("ESC") PORT_CODE(KEYCODE_ESC)
PORT_BIT(0x0200, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("1 !") PORT_CODE(KEYCODE_1)
PORT_BIT(0x0400, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("TAB") PORT_CODE(KEYCODE_TAB)
PORT_BIT(0x0800, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Q") PORT_CODE(KEYCODE_Q)
PORT_BIT(0x1000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("CAPS LOCK") PORT_CODE(KEYCODE_CAPSLOCK) PORT_TOGGLE
PORT_BIT(0x2000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("A") PORT_CODE(KEYCODE_A)
PORT_BIT(0x4000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("SHIFT (l)") PORT_CODE(KEYCODE_LSHIFT)
PORT_BIT(0x8000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Z") PORT_CODE(KEYCODE_Z)
PORT_START("KEY4") /* port 4: keys 0x40 through 0x4f */
PORT_BIT(0x0001, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("6 ^") PORT_CODE(KEYCODE_6)
PORT_BIT(0x0002, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("7 &") PORT_CODE(KEYCODE_7)
PORT_BIT(0x0004, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Y") PORT_CODE(KEYCODE_Y)
PORT_BIT(0x0008, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("U") PORT_CODE(KEYCODE_U)
PORT_BIT(0x0010, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("H") PORT_CODE(KEYCODE_H)
PORT_BIT(0x0020, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("J") PORT_CODE(KEYCODE_J)
PORT_BIT(0x0040, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("N") PORT_CODE(KEYCODE_N)
PORT_BIT(0x0080, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("M") PORT_CODE(KEYCODE_M)
PORT_BIT(0x0100, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("CONTROL") PORT_CODE(KEYCODE_LCONTROL)
PORT_BIT(0x0200, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("FAST") PORT_CODE(KEYCODE_TILDE)
PORT_BIT(0x0400, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("COMMAND") PORT_CODE(KEYCODE_LALT)
PORT_BIT(0x0800, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("(space)") PORT_CODE(KEYCODE_SPACE)
PORT_BIT(0x1000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("ALT") PORT_CODE(KEYCODE_RALT)
PORT_BIT(0x2000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("0") PORT_CODE(KEYCODE_0_PAD)
PORT_BIT(0x4000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("00") PORT_CODE(KEYCODE_ASTERISK)
PORT_BIT(0x8000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME(".") PORT_CODE(KEYCODE_DEL_PAD)
PORT_START("KEY5") /* port 5: keys 0x50 through 0x5f */
PORT_BIT(0x0001, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("8 *") PORT_CODE(KEYCODE_8)
PORT_BIT(0x0002, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("9 (") PORT_CODE(KEYCODE_9)
PORT_BIT(0x0004, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("I") PORT_CODE(KEYCODE_I)
PORT_BIT(0x0008, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("O") PORT_CODE(KEYCODE_O)
PORT_BIT(0x0010, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("K") PORT_CODE(KEYCODE_K)
PORT_BIT(0x0020, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("L") PORT_CODE(KEYCODE_L)
PORT_BIT(0x0040, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME(", <") PORT_CODE(KEYCODE_COMMA)
PORT_BIT(0x0080, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME(". >") PORT_CODE(KEYCODE_STOP)
PORT_BIT(0x0100, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("F6") PORT_CODE(KEYCODE_F6)
PORT_BIT(0x0200, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("F7") PORT_CODE(KEYCODE_F7)
PORT_BIT(0x0400, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("F8") PORT_CODE(KEYCODE_F8)
PORT_BIT(0x0800, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("F9") PORT_CODE(KEYCODE_F9)
PORT_BIT(0x1000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("F10") PORT_CODE(KEYCODE_F10)
PORT_BIT(0x2000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("(up)") PORT_CODE(KEYCODE_UP)
PORT_BIT(0x4000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("???") PORT_CODE(KEYCODE_SLASH_PAD)
PORT_BIT(0x8000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("BREAK") PORT_CODE(KEYCODE_PAUSE)
PORT_START("DSW0") /* port 6: on-board DIP switches */
PORT_DIPNAME(0x01, 0x00, "Omninet Address bit 0")
PORT_DIPSETTING(0x00, DEF_STR( Off ))
PORT_DIPSETTING(0x01, DEF_STR( On ))
PORT_DIPNAME(0x02, 0x02, "Omninet Address bit 1")
PORT_DIPSETTING(0x00, DEF_STR( Off ))
PORT_DIPSETTING(0x02, DEF_STR( On ))
PORT_DIPNAME(0x04, 0x00, "Omninet Address bit 2")
PORT_DIPSETTING(0x00, DEF_STR( Off ))
PORT_DIPSETTING(0x04, DEF_STR( On ))
PORT_DIPNAME(0x08, 0x00, "Omninet Address bit 3")
PORT_DIPSETTING(0x00, DEF_STR( Off ))
PORT_DIPSETTING(0x08, DEF_STR( On ))
PORT_DIPNAME(0x10, 0x00, "Omninet Address bit 4")
PORT_DIPSETTING(0x00, DEF_STR( Off ))
PORT_DIPSETTING(0x10, DEF_STR( On ))
PORT_DIPNAME(0x20, 0x00, "Omninet Address bit 5")
PORT_DIPSETTING(0x00, DEF_STR( Off ))
PORT_DIPSETTING(0x20, DEF_STR( On ))
PORT_DIPNAME(0xc0, 0x00, "Type of Boot")
PORT_DIPSETTING(0x00, "Prompt for type of Boot") // Documentation has 0x00 and 0xc0 reversed per boot PROM
PORT_DIPSETTING(0x40, "Boot from Omninet")
PORT_DIPSETTING(0x80, "Boot from Local Disk")
PORT_DIPSETTING(0xc0, "Boot from Diskette")
#if 0
PORT_START("DISPLAY") /* port 7: Display orientation */
PORT_DIPNAME(0x01, 0x00, "Screen Orientation")
PORT_DIPSETTING(0x00, "Horizontal")
PORT_DIPSETTING(0x01, "Vertical")
#endif
INPUT_PORTS_END
/* init with simple, fixed, B/W palette */
/* Is the palette black on white or white on black??? */
SLOT_INTERFACE_START( concept_exp_devices )
SLOT_INTERFACE("fdc", CONCEPT_FDC)
SLOT_INTERFACE("hdc", CONCEPT_HDC)
SLOT_INTERFACE_END
static MACHINE_CONFIG_START( concept, concept_state )
/* basic machine hardware */
MCFG_CPU_ADD("maincpu", M68000, 8182000) /* 16.364 MHz / 2 */
MCFG_CPU_PROGRAM_MAP(concept_memmap)
MCFG_CPU_VBLANK_INT_DRIVER("screen", concept_state, concept_interrupt)
MCFG_QUANTUM_TIME(attotime::from_hz(60))
/* video hardware */
MCFG_SCREEN_ADD("screen", RASTER)
MCFG_SCREEN_VIDEO_ATTRIBUTES(VIDEO_UPDATE_BEFORE_VBLANK)
MCFG_SCREEN_REFRESH_RATE(60) /* 50 or 60, jumper-selectable */
MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) /* not accurate */
MCFG_SCREEN_SIZE(720, 560)
MCFG_SCREEN_VISIBLE_AREA(0, 720-1, 0, 560-1)
MCFG_SCREEN_UPDATE_DRIVER(concept_state, screen_update_concept)
MCFG_SCREEN_PALETTE("palette")
MCFG_PALETTE_ADD_BLACK_AND_WHITE("palette")
/* no sound? */
/* rtc */
MCFG_DEVICE_ADD("mm58274c", MM58274C, 0)
MCFG_MM58274C_MODE24(0) // 12 hour
MCFG_MM58274C_DAY1(1) // monday
/* via */
MCFG_DEVICE_ADD("via6522_0", VIA6522, 1022750)
MCFG_VIA6522_READPA_HANDLER(READ8(concept_state, via_in_a))
MCFG_VIA6522_READPB_HANDLER(READ8(concept_state, via_in_b))
MCFG_VIA6522_WRITEPA_HANDLER(WRITE8(concept_state, via_out_a))
MCFG_VIA6522_WRITEPB_HANDLER(WRITE8(concept_state, via_out_b))
MCFG_VIA6522_CB2_HANDLER(WRITELINE(concept_state, via_out_cb2))
MCFG_VIA6522_IRQ_HANDLER(WRITELINE(concept_state, via_irq_func))
/* ACIAs */
MCFG_DEVICE_ADD(ACIA_0_TAG, MOS6551, 0)
MCFG_MOS6551_XTAL(XTAL_1_8432MHz)
MCFG_DEVICE_ADD(ACIA_1_TAG, MOS6551, 0)
MCFG_MOS6551_XTAL(XTAL_1_8432MHz)
MCFG_CONCEPT_EXP_PORT_ADD("exp1", concept_exp_devices, NULL)
MCFG_CONCEPT_EXP_PORT_ADD("exp2", concept_exp_devices, "fdc") // Flat cable Hard Disk Controller in Slot 2
MCFG_CONCEPT_EXP_PORT_ADD("exp3", concept_exp_devices, "hdc") // Floppy Disk Controller in Slot 3
MCFG_CONCEPT_EXP_PORT_ADD("exp4", concept_exp_devices, NULL)
// 2x RS232 ports!
MACHINE_CONFIG_END
ROM_START( concept )
ROM_REGION16_BE(0x100000,"maincpu",0) /* 68k rom and ram */
// concept boot ROM
ROM_SYSTEM_BIOS(0, "lvl8", "Level 8" ) // v0?
ROMX_LOAD("bootl08h", 0x010000, 0x1000, CRC(ee479f51) SHA1(b20ba18564672196076e46507020c6d69a640a2f), ROM_BIOS(1) | ROM_SKIP(1))
ROMX_LOAD("bootl08l", 0x010001, 0x1000, CRC(acaefd07) SHA1(de0c7eaacaf4c0652aa45e523cebce2b2993c437), ROM_BIOS(1) | ROM_SKIP(1))
ROM_SYSTEM_BIOS(1, "lvl7", "Level 7" ) // v0? v1?
ROMX_LOAD("cc07h", 0x010000, 0x1000, CRC(455abac8) SHA1(b12e1580220242d34eafed1b486cebd89e823c8b), ROM_BIOS(2) | ROM_SKIP(1))
ROMX_LOAD("cc07l", 0x010001, 0x1000, CRC(107a3830) SHA1(0ea12ef13b0d11fcd83b306b3a1bb8014ba910c0), ROM_BIOS(2) | ROM_SKIP(1))
ROM_SYSTEM_BIOS(2, "lvl6", "Level 6" ) // v0?
ROMX_LOAD("cc06h", 0x010000, 0x1000, CRC(66b6b259) SHA1(1199a38ef3e94f695e8da6a7c80c6432da3cb80c), ROM_BIOS(3) | ROM_SKIP(1))
ROMX_LOAD("cc06l", 0x010001, 0x1000, CRC(600940d3) SHA1(c3278bf23b3b1c35ea1e3da48a05e877862a8345), ROM_BIOS(3) | ROM_SKIP(1))
ROM_REGION(0x400, "proms", 0)
ROM_LOAD("map04a.bin", 0x000, 0x400, CRC(1ae0db9b) SHA1(cdb6f63bb08072b454b4704e62de51c483ede734) )
#if 0
// version 1 lvl 7 release
ROM_LOAD16_BYTE("bootl17h", 0x010000, 0x1000, CRC(6dd9718f)) // where does this come from?
ROM_LOAD16_BYTE("bootl17l", 0x010001, 0x1000, CRC(107a3830))
#elif 0
// version $F lvl 8 (development version found on a floppy disk along with
// the source code)
ROM_LOAD16_WORD("cc.prm", 0x010000, 0x2000, CRC(b5a87dab) SHA1(0da59af6cfeeb38672f71731527beac323d9c3d6))
#endif
#if 0
// only known MACSbug release for the concept, with reset vector and
// entry point (the reset vector seems to be bogus: is the ROM dump bad,
// or were the ROMs originally loaded with buggy code?)
ROM_LOAD16_BYTE("macsbugh", 0x020000, 0x1000, CRC(aa357112))
ROM_LOAD16_BYTE("macsbugl", 0x020001, 0x1000, CRC(b4b59de9))
#endif
ROM_END
/* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME */
COMP( 1982, concept, 0, 0, concept, concept, driver_device, 0, "Corvus Systems", "Concept" , GAME_NO_SOUND)