src/mess/drivers/vt520.c
| r0 | r5129 | |
|---|
| 1 | /*************************************************************************** |
| 2 | |
| 3 | DEC VT520 |
| 4 | |
| 5 | 02/07/2009 Skeleton driver. |
| 6 | |
| 7 | ****************************************************************************/ |
| 8 | |
| 9 | #include "driver.h" |
| 10 | #include "cpu/mcs51/mcs51.h" |
| 11 | |
| 12 | static ADDRESS_MAP_START(vt520_mem, ADDRESS_SPACE_PROGRAM, 8) |
| 13 | AM_RANGE(0x0000, 0xffff) AM_ROM |
| 14 | ADDRESS_MAP_END |
| 15 | |
| 16 | static ADDRESS_MAP_START( vt520_io , ADDRESS_SPACE_IO, 8) |
| 17 | ADDRESS_MAP_UNMAP_HIGH |
| 18 | ADDRESS_MAP_END |
| 19 | |
| 20 | /* Input ports */ |
| 21 | INPUT_PORTS_START( vt520 ) |
| 22 | INPUT_PORTS_END |
| 23 | |
| 24 | |
| 25 | static MACHINE_RESET(vt520) |
| 26 | { |
| 27 | } |
| 28 | |
| 29 | static VIDEO_START( vt520 ) |
| 30 | { |
| 31 | } |
| 32 | |
| 33 | static VIDEO_UPDATE( vt520 ) |
| 34 | { |
| 35 | return 0; |
| 36 | } |
| 37 | |
| 38 | static MACHINE_DRIVER_START( vt520 ) |
| 39 | /* basic machine hardware */ |
| 40 | MDRV_CPU_ADD("maincpu",I8032, XTAL_20MHz) |
| 41 | MDRV_CPU_PROGRAM_MAP(vt520_mem) |
| 42 | MDRV_CPU_IO_MAP(vt520_io) |
| 43 | |
| 44 | MDRV_MACHINE_RESET(vt520) |
| 45 | |
| 46 | /* video hardware */ |
| 47 | MDRV_SCREEN_ADD("screen", RASTER) |
| 48 | MDRV_SCREEN_REFRESH_RATE(50) |
| 49 | MDRV_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) /* not accurate */ |
| 50 | MDRV_SCREEN_FORMAT(BITMAP_FORMAT_INDEXED16) |
| 51 | MDRV_SCREEN_SIZE(640, 480) |
| 52 | MDRV_SCREEN_VISIBLE_AREA(0, 640-1, 0, 480-1) |
| 53 | MDRV_PALETTE_LENGTH(2) |
| 54 | MDRV_PALETTE_INIT(black_and_white) |
| 55 | |
| 56 | MDRV_VIDEO_START(vt520) |
| 57 | MDRV_VIDEO_UPDATE(vt520) |
| 58 | MACHINE_DRIVER_END |
| 59 | |
| 60 | static SYSTEM_CONFIG_START(vt520) |
| 61 | SYSTEM_CONFIG_END |
| 62 | |
| 63 | /* ROM definition */ |
| 64 | ROM_START( vt520 ) |
| 65 | ROM_REGION( 0x80000, "maincpu", ROMREGION_ERASEFF ) |
| 66 | ROM_LOAD( "23-010ed-00__9739_d.e20.bin", 0x0000, 0x80000, CRC(2502cc22) SHA1(0437c3107412f69e09d050fef003f2a81d8a3163)) |
| 67 | |
| 68 | ROM_END |
| 69 | |
| 70 | /* Driver */ |
| 71 | |
| 72 | /* YEAR NAME PARENT COMPAT MACHINE INPUT INIT CONFIG COMPANY FULLNAME FLAGS */ |
| 73 | COMP( ????, vt520, 0, 0, vt520, vt520, 0, vt520, "DEC", "VT520", GAME_NOT_WORKING) |
| 74 | |