src/mess/drivers/osbexec.c
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| 5 | 5 | Screen is 80x24 |
| 6 | 6 | |
| 7 | 7 | On boot at least bios seems to be enabled. |
| 8 | | Boot sequence: |
| 9 | | - set stack to and initialize Fxxx |
| 10 | | - write stuff to/initialize 2000-27FF |
| 11 | | - set PA to 80 |
| 12 | | - initialize some more i/o |
| 13 | | - set PA to C0 |
| 14 | | - test C000-CFFF |
| 15 | | - Set PA to 80 |
| 16 | | - i/o things |
| 17 | | - Set PA to C0 |
| 18 | | - Clear VRAM with 0x20 |
| 19 | | - Write "PERFORMING SELF-TEST" to VRAM |
| 20 | | - Set PA to 80 |
| 21 | | - (bp 0307) |
| 22 | | - Test 2000-27FF |
| 23 | | - Set SP to 27FF |
| 24 | | - Set PA to 80 |
| 25 | | - Test 4000-FFFF |
| 26 | | - Set PA to 81 |
| 27 | | - Test 4000-EFFF |
| 28 | | - (bp 2c6) |
| 29 | | - Test i/o |
| 30 | 8 | |
| 9 | Floppy breakpoints: |
| 10 | - bp 0c50 |
| 11 | - bp 1449 |
| 12 | - bp 1465 |
| 31 | 13 | |
| 14 | |
| 32 | 15 | ***************************************************************************/ |
| 33 | 16 | |
| 34 | 17 | #include "emu.h" |
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| 51 | 34 | { |
| 52 | 35 | public: |
| 53 | 36 | osbexec_state(running_machine &machine, const driver_device_config_base &config) |
| 54 | | : driver_device(machine, config) { } |
| 37 | : driver_device(machine, config), |
| 38 | maincpu( *this, "maincpu" ), |
| 39 | mb8877( *this, "mb8877" ), |
| 40 | messram( *this, "messram" ), |
| 41 | pia_0( *this, "pia_0" ), |
| 42 | pia_1( *this, "pia_1" ), |
| 43 | sio( *this, "sio" ), |
| 44 | speaker( *this, "speaker" ) |
| 45 | { } |
| 55 | 46 | |
| 56 | | running_device *maincpu; |
| 57 | | running_device *mb8877; |
| 58 | | running_device *messram; |
| 59 | | running_device *pia_0; |
| 60 | | running_device *pia_1; |
| 61 | | running_device *sio; |
| 62 | | running_device *speaker; |
| 47 | required_device<cpu_device> maincpu; |
| 48 | required_device<running_device> mb8877; |
| 49 | required_device<running_device> messram; |
| 50 | required_device<pia6821_device> pia_0; |
| 51 | required_device<pia6821_device> pia_1; |
| 52 | required_device<z80dart_device> sio; |
| 53 | required_device<running_device> speaker; |
| 63 | 54 | |
| 64 | 55 | region_info *fontram_region; |
| 65 | 56 | region_info *vram_region; |
| 66 | 57 | UINT8 *fontram; |
| 67 | 58 | UINT8 *vram; |
| 59 | UINT8 *ram_0000; |
| 68 | 60 | emu_timer *video_timer; |
| 69 | 61 | |
| 70 | 62 | /* PIA 0 (UD12) */ |
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| 81 | 73 | |
| 82 | 74 | void set_banks(running_machine *machine) |
| 83 | 75 | { |
| 84 | | UINT8 *messram_ptr = messram_get_ptr( messram ); |
| 76 | |
| 85 | 77 | |
| 86 | 78 | if ( pia0_porta & 0x01 ) |
| 87 | | messram_ptr += 0x10000; |
| 79 | |
| 88 | 80 | |
| 89 | | memory_set_bankptr( machine, "4000", messram_ptr + 0x4000 ); |
| 90 | | memory_set_bankptr( machine, "c000", messram_ptr + 0xc000 ); |
| 91 | | memory_set_bankptr( machine, "e000", messram_ptr + 0xe000 ); |
| 81 | memory_set_bankptr( machine, "0000", ram_0000 + 0x0000 ); |
| 82 | memory_set_bankptr( machine, "4000", ram_0000 + 0x4000 ); |
| 83 | memory_set_bankptr( machine, "c000", ram_0000 + 0xc000 ); |
| 84 | memory_set_bankptr( machine, "e000", ram_0000 + 0xe000 ); |
| 92 | 85 | |
| 93 | 86 | if ( pia0_porta & 0x80 ) |
| 94 | 87 | memory_set_bankptr( machine, "0000", memory_region(machine, "maincpu") ); |
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| 117 | 110 | if ( offset < 0x1000 ) |
| 118 | 111 | state->fontram[ offset ] = data; |
| 119 | 112 | } |
| 113 | else |
| 114 | { |
| 115 | state->ram_0000[ offset ] = data; |
| 116 | } |
| 120 | 117 | } |
| 121 | 118 | |
| 122 | 119 | |
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| 339 | 336 | state->pia0_portb = data; |
| 340 | 337 | |
| 341 | 338 | speaker_level_w( state->speaker, ( data & 0x08 ) ? 0 : 1 ); |
| 339 | |
| 340 | switch ( data & 0x06 ) |
| 341 | { |
| 342 | case 0x02: |
| 343 | wd17xx_set_drive( state->mb8877, 1 ); |
| 344 | break; |
| 345 | case 0x04: |
| 346 | wd17xx_set_drive( state->mb8877, 0 ); |
| 347 | break; |
| 348 | } |
| 349 | |
| 342 | 350 | wd17xx_dden_w( state->mb8877, ( data & 0x01 ) ? 1 : 0 ); |
| 343 | 351 | } |
| 344 | 352 | |
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| 567 | 575 | } |
| 568 | 576 | |
| 569 | 577 | |
| 570 | | static MACHINE_START( osbexec ) |
| 571 | | { |
| 572 | | osbexec_state *state = machine->driver_data<osbexec_state>(); |
| 573 | | |
| 574 | | state->maincpu = machine->device( "maincpu" ); |
| 575 | | state->mb8877 = machine->device( "mb8877" ); |
| 576 | | state->messram = machine->device( "messram" ); |
| 577 | | state->pia_0 = machine->device( "pia_0" ); |
| 578 | | state->pia_1 = machine->device( "pia_1" ); |
| 579 | | state->sio = machine->device( "sio" ); |
| 580 | | state->speaker = machine->device( "speaker" ); |
| 581 | | } |
| 582 | | |
| 583 | | |
| 584 | 578 | static MACHINE_RESET( osbexec ) |
| 585 | 579 | { |
| 586 | 580 | osbexec_state *state = machine->driver_data<osbexec_state>(); |
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| 608 | 602 | MDRV_CPU_IO_MAP( osbexec_io) |
| 609 | 603 | MDRV_CPU_CONFIG( osbexec_daisy_config ) |
| 610 | 604 | |
| 611 | | MDRV_MACHINE_START( osbexec ) |
| 612 | 605 | MDRV_MACHINE_RESET( osbexec ) |
| 613 | 606 | |
| 614 | 607 | MDRV_SCREEN_ADD("screen", RASTER) |