U.S. Championship V'ball Memory Map

Contributors
Contributors
- Contributor Account
- Sign Up
On-Line Databases
On-Line Databases
Main
Main
Education
Education
My Restorations
My Restorations
- Restorations
- Conversions
Restoring Games
Restoring Games
Repairing Games
Repairing Games
Resources
Resources
Miscellaneous
Miscellaneous

Memory Map

The following is a memory map that was generated based on the MAME source code (.180). This information is only as accurate as the MAME driver is. If you see any errors, please let me know what that error is.

The Memory Area is related to where the information is from (CPU, Sound Board, etc..), and it may also reflect what it has in common with other hardware.

U.S. Championship V'ball (bootleg, 1988)

Memory Area:main_map

Address Range	Length	Function	Description
0x0000-0x07FF	2048	RAM
0x0800-0x08FF	256	RAM, Shared	spriteram
0x1000	1	Read Port	P1
0x1001	1	Read Port	P2
0x1002	1	Read Port	SYSTEM
0x1003	1	Read Port	DSW1
0x1004	1	Read Port	DSW2
0x1005	1	Read Port	P3
0x1006	1	Read Port	P4
0x1008	1	Write	scrollx_hi_w
0x1009	1	Write	bankswitch_w
0x100A-0x100B	2	Write	irq_ack_w (/* is there a scanline counter here? */)
0x100C	1	Write	scrollx_lo_w
0x100D	1	Write	cpu_sound_command_w
0x100E	1	Write Only, Shared	scrolly_lo
0x2000-0x2FFF	4096	Write, Shared	videoram_w, videoram
0x3000-0x3FFF	4096	Write, Shared	attrib_w, attribram
0x4000-0x7FFF	16384	ROM Bank	mainbank
0x8000-0xFFFF	32768	ROM

Memory Area:sound_map

Address Range	Length	Function	Description
0x0000-0x7FFF	32768	ROM
0x8000-0x87FF	2048	RAM
0x8800-0x8801	2	Device Read/Write	ymsnd, ym2151_device, read, write
0x9800-0x9803	4	Device Read/Write	oki, okim6295_device, read, write
0xA000	1	Device Read	soundlatch, generic_latch_8_device, read

ROM Map for this game

This is the ROM map for the game. This should tell you what address the ROM is at, how big it is, what it's used for.

Memory Area:maincpu

Address Range	Length	Label/Location	Description
0x0000-0x7FFF	32768	25j1-0.47	CRC(10ca79ad) (Fluke: 9495)

Memory Area:oki

Address Range	Length	Label/Location	Description
0x0000-0xFFFF	65536	vball.78a	CRC(f3e63b76),== 1st half of 25j0-0.78 (Fluke: B06D)
0x0000-0xFFFF	65536	vball.78a	CRC(f3e63b76),== 1st half of 25j0-0.78 (Fluke: B06D)
0x10000-0x1FFFF	65536	vball.78b	CRC(7ad9d338),== 2nd half of 25j0-0.78 (Fluke: E150)

Memory Area:proms

Address Range	Length	Label/Location	Description
0x0800-0x0FFF	2048	25j7-0.160	CRC(2ffb68b3) (Fluke: 2097)
0x0800-0x0FFF	2048	25j7-0.160	CRC(2ffb68b3) (Fluke: 2097)