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Virtual Combat memory map updates. [Jason Eckhardt, Andrew Gardner]
(You can see a mirrored test menu with a few ROM patches now) (The i860 code has been found and has been deemed "dead simple" by the guy who wrote the unix binutils i860 disassembler, Jason Eckhardt. He also wrote an i860 cpu core in the past and has donated parts of it to MAME. If he weren't finishing up his phd thesis in 2 months, i'd say he'd have finished this driver by now himself :) )
This commit is contained in:
Andrew Gardner
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ac0a9ecfc8
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@ -1,6 +1,8 @@
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/*
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Virtual Combat hardware games.
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Driver by Jason Eckhardt and Andrew Gardner.
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----
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There are two known games on this hardware. Both are developed by
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@ -72,69 +74,138 @@ TODO : This is a skeleton driver. Nearly everything.
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#include "cpu/m68000/m68000.h"
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#include "video/generic.h"
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static UINT16* framebuffer;
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static ADDRESS_MAP_START( main_map, ADDRESS_SPACE_PROGRAM, 16 )
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AM_RANGE(0x000000, 0x0fffff) AM_ROM
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AM_RANGE(0x200000, 0x201fff) AM_RAM /* At the very least! */
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AM_RANGE(0x200000, 0x2fffff) AM_RAM
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AM_RANGE(0x300000, 0x3fffff) AM_RAM AM_BASE(&framebuffer)
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// AM_RANGE(0x400000, 0x43ffff) i860 #1 shared RAM
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// AM_RANGE(0x440000, 0x440003) i860 #1 com 1
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// AM_RANGE(0x480000, 0x480003) i860 #1 com 2
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// AM_RANGE(0x4c0000, 0x4c0003) i860 #1 stop/start/reset
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// AM_RANGE(0x500000, 0x53ffff) i860 #2 shared RAM
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// AM_RANGE(0x540000, 0x540003) i860 #2 com 1
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// AM_RANGE(0x580000, 0x580003) i860 #2 com 2
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// AM_RANGE(0x5c0000, 0x5c0003) i860 #2 stop/start/reset
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// AM_RANGE(0x706000, 0x706003) Bt476 RAMDAC
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// AM_RANGE(0x706004, 0x706007) Bt476 RAMDAC (not sure if there are 2?)
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ADDRESS_MAP_END
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static ADDRESS_MAP_START( sound_map, ADDRESS_SPACE_PROGRAM, 16 )
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AM_RANGE(0x000000, 0x03ffff) AM_ROM
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ADDRESS_MAP_END
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/*
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static ADDRESS_MAP_START( video_map, ADDRESS_SPACE_PROGRAM, 16 )
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AM_RANGE(0x000000, 0x1fffff) AM_ROM
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ADDRESS_MAP_END
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*/
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// The first 3d CPU
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//static ADDRESS_MAP_START( 3d_1_map, ADDRESS_SPACE_PROGRAM, ?? )
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// AM_RANGE(0x00000000, 0x000fffff) Shared framebuffer
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// AM_RANGE(0xfffc0000, 0xffffffff) Shared RAM (0x400000 in 68k-land)
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// AM_RANGE(0x20000000, 0x20000003) com 1 (0x440000 in 68k-land)
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// AM_RANGE(0x40000000, 0x401fffff) AM_ROM
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// AM_RANGE(0x80000000, 0x80000003) com 2 (0x480000 in 68k-land)
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//ADDRESS_MAP_END
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// The second 3d CPU
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//static ADDRESS_MAP_START( 3d_2_map, ADDRESS_SPACE_PROGRAM, ?? )
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// AM_RANGE(0x00000000, 0x000fffff) Shared framebuffer
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// AM_RANGE(0xfffc0000, 0xffffffff) Shared RAM (0x500000 in 68k-land)
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// AM_RANGE(0x20000000, 0x20000003) com 1 (0x540000 in 68k-land)
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// AM_RANGE(0x40000000, 0x401fffff) AM_ROM
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// AM_RANGE(0x80000000, 0x80000003) com 2 (0x580000 in 68k-land)
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//ADDRESS_MAP_END
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// Sound CPU - temprarily disabled
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//static ADDRESS_MAP_START( sound_map, ADDRESS_SPACE_PROGRAM, 16 )
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// AM_RANGE(0x000000, 0x03ffff) AM_ROM
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//ADDRESS_MAP_END
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static DRIVER_INIT( vcombat )
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{
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UINT8 *ROM = memory_region(machine, "main");
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// pc==4016 : jump 4038 ... There's something strange about how it waits at 402e (interrupts all masked out)
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ROM[0x4017] = 0x66;
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// pc==40fa : jump 40fc ... 600004 should be -16? (interrupts still masked out)
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ROM[0x40fb] = 0x67;
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// pc==410e : jump 4110 ... 600004 should be 31 now? (interrupts still masked out)
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ROM[0x410f] = 0x67;
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// pc==e220 : jump e222 ... 20119a should not be 0. (no interrupts masked)
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// TODO: I wonder if this is an input bit or something. The menu selection continually crawls up.
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}
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static INPUT_PORTS_START( vcombat )
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INPUT_PORTS_END
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static VIDEO_UPDATE( vcombat )
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{
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int x, y;
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int count = 0;
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for(y = 0; y < 480; y++)
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{
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for(x = 0; x < 256; x++)
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{
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//UINT32 r,g,b;
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UINT32 color;
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if (x % 2) color = (framebuffer[count] & 0xff00) >> 8;
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else color = framebuffer[count] & 0x00ff;
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if(x < video_screen_get_visible_area(screen)->max_x && y < video_screen_get_visible_area(screen)->max_y)
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*BITMAP_ADDR32(bitmap, y, x) = color | (color<<8) | (color<<16);
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if (x % 2) count++;
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}
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}
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return 0;
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}
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// This is just here to show that there is text in the main program ROM. It probably won't really be a useful decode.
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static const gfx_layout vcombat_charlayout =
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{
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8, 8,
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0x100000 / 0x80,
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8,
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{ 0,1,2,3,4,5,6,7 },
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{ 0*16, 1*16, 2*16, 3*16, 4*16, 5*16, 6*16, 7*16 },
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{ 0*16, 1*16, 2*16, 3*16, 4*16, 5*16, 6*16, 7*16 },
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{ 0*16*8, 1*16*8, 2*16*8, 3*16*8, 4*16*8, 5*16*8, 6*16*8, 7*16*8 },
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8 * 0x80
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};
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static GFXDECODE_START( vcombat )
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GFXDECODE_ENTRY( "main", 0, vcombat_charlayout, 0, 256 )
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GFXDECODE_END
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static MACHINE_DRIVER_START( vcombat )
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MDRV_CPU_ADD("main", M68000, XTAL_12MHz)
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MDRV_CPU_PROGRAM_MAP(main_map,0)
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MDRV_CPU_VBLANK_INT("main", irq7_line_hold) /* The only un-masked irq thus far */
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//MDRV_CPU_VBLANK_INT("main", irq7_line_hold)
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MDRV_CPU_ADD("sound", M68000, XTAL_12MHz)
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MDRV_CPU_PROGRAM_MAP(sound_map,0)
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// Disabled for now
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//MDRV_CPU_ADD("sound", M68000, XTAL_12MHz)
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//MDRV_CPU_PROGRAM_MAP(sound_map,0)
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/*
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Virtual combat has an i860 on each of its two upper boards.
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MDRV_CPU_ADD("video", i860, XTAL_20MHz)
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MDRV_CPU_PROGRAM_MAP(video_map,0)
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*/
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// Likely will go away
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MDRV_GFXDECODE(vcombat)
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MDRV_SCREEN_ADD("main", RASTER)
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MDRV_SCREEN_FORMAT(BITMAP_FORMAT_RGB32)
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MDRV_SCREEN_REFRESH_RATE(60)
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MDRV_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(0))
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MDRV_SCREEN_FORMAT(BITMAP_FORMAT_RGB32)
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MDRV_SCREEN_SIZE(640, 480)
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MDRV_GFXDECODE(vcombat)
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MDRV_SCREEN_VISIBLE_AREA(0, 640-1, 0, 480-1)
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/*MDRV_PALETTE_LENGTH(0x100)*/
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MDRV_QUANTUM_TIME(HZ(120000)) /* Temporary */
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// Seems there is a RAMDAC out there. Maybe it's for the palette?
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/*MDRV_PALETTE_LENGTH(0x256)*/
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MDRV_VIDEO_UPDATE(vcombat)
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MACHINE_DRIVER_END
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@ -198,6 +269,6 @@ ROM_START( shadfgtr )
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/* The second upper-board PAL couldn't be read */
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ROM_END
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/* YEAR NAME PARENT MACHINE INPUT INIT MONITOR COMPANY FULLNAME FLAGS */
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GAME( 1993, vcombat, 0, vcombat, vcombat, 0, ROT0, "VR8 Inc.", "Virtual Combat", GAME_NOT_WORKING | GAME_NO_SOUND )
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GAME( 1989, shadfgtr, 0, vcombat, vcombat, 0, ROT0, "Sega?", "Shadow Fighters", GAME_NOT_WORKING | GAME_NO_SOUND )
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/* YEAR NAME PARENT MACHINE INPUT INIT MONITOR COMPANY FULLNAME FLAGS */
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GAME( 1993, vcombat, 0, vcombat, vcombat, vcombat, ROT0, "VR8 Inc.", "Virtual Combat", GAME_NOT_WORKING | GAME_NO_SOUND )
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GAME( 1989, shadfgtr, 0, vcombat, vcombat, 0, ROT0, "Sega?", "Shadow Fighters", GAME_NOT_WORKING | GAME_NO_SOUND )
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