The Billiards Memory Map

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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.

The Billiards (bootleg, 1981)

Memory Area:hustler_map

Address Range	Length	Function	Description
0x0000-0x7FFF	32768	ROM
0x8000-0x87FF	2048	RAM
0x8800-0x8BFF	1024	RAM Write, Shared	galaxold_videoram_w, videoram
0x9000-0x903F	64	RAM Write, Shared	galaxold_attributesram_w, attributesram
0x9040-0x905F	32	RAM, Shared	spriteram
0x9060-0x907F	32	RAM, Shared	bulletsram
0x9080-0x90FF	128	RAM
0xA802	1	Write	galaxold_flip_screen_x_w
0xA804	1	Write	galaxold_nmi_enable_w
0xA806	1	Write	galaxold_flip_screen_y_w
0xA80E	1	Write NOP	(/* coin counters */)
0xB800	1	Device Read	watchdog, watchdog_timer_device, reset_r
0xD000-0xD01F	32	Read/Write	hustler_ppi8255_0_r, hustler_ppi8255_0_w
0xE000-0xE01F	32	Read/Write	hustler_ppi8255_1_r, hustler_ppi8255_1_w

Memory Area:hustler_sound_io_map

Address Range	Length	Function	Description
0x0040	1	Device Read/Write	aysnd, ay8910_device, data_r, data_w
0x0080	1	Device Write	aysnd, ay8910_device, address_w

Memory Area:hustler_sound_map

Address Range	Length	Function	Description
0x0000-0x1FFF	8192	ROM
0x4000-0x43FF	1024	RAM
0x6000-0x6FFF	4096	Write	frogger_filter_w

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:audiocpu

Address Range	Length	Label/Location	Description
0x0000-0x07FF	2048	hustler.6	CRC(7a946544) (Fluke: AA11)
0x0800-0x0FFF	2048	hustler.7	CRC(3db57351) (Fluke: C64C)

Memory Area:gfx1

Address Range	Length	Label/Location	Description
0x0000-0x07FF	2048	hustler.5f	CRC(0bdfad0e) (Fluke: 0955)
0x0800-0x0FFF	2048	hustler.5h	CRC(8e062177) (Fluke: F723)

Memory Area:maincpu

Address Range	Length	Label/Location	Description
0x0000-0x0FFF	4096	a	CRC(b7eb50c0) (Fluke: F22F)
0x1000-0x1FFF	4096	b	CRC(988fe1c5) (Fluke: 7AA9)
0x2000-0x2FFF	4096	c	CRC(7b8de793) (Fluke: FBAE)

Memory Area:proms

Address Range	Length	Label/Location	Description
0x0000-0x001F	32	hustler.clr	CRC(aa1f7f5e) (Fluke: 4E05)