Prehistoric Isle in 1930 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.

Prehistoric Isle in 1930 (SNK, 1989)

Memory Area:prehisle_map

Address Range	Length	Function	Description
0x0000-0x3FFFF	262144	ROM
0x70000-0x73FFF	16384	RAM
0x90000-0x907FF	2048	RAM Write, Shared	tx_vram_w, tx_vram
0xA0000-0xA07FF	2048	RAM, Shared	spriteram
0xB0000-0xB3FFF	16384	RAM Write, Shared	fg_vram_w, fg_vram
0xD0000-0xD07FF	2048	RAM Device Write, Shared	palette, palette_device, write, palette
0xE0000-0xE00FF	256	Read	control_r
0xF0000-0xFF0FF	61696	Write	control_w
0xF0070-0xFF071	61442	Write	soundcmd_w

Memory Area:prehisle_sound_io_map

Address Range	Length	Function	Description
0x0000	1	Device Read/Write	ymsnd, ym3812_device, status_port_r, control_port_w
0x0020	1	Device Write	ymsnd, ym3812_device, write_port_w
0x0040	1	Write	D7759_write_port_0_w
0x0080	1	Write	D7759_upd_reset_w

Memory Area:prehisle_sound_map

Address Range	Length	Function	Description
0x0000-0xEFFF	61440	ROM
0xF000-0xF7FF	2048	RAM
0xF800	1	Device Read	soundlatch, generic_latch_8_device, read
0xF800	1	Write NOP	(// ???)

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
0x0000-0xFFFF	65536	gt1.1	CRC(80a4c093) (Fluke: 3C18)
0x0000-0xFFFF	65536	gt1.1	CRC(80a4c093) (Fluke: 3C18)

Memory Area:bgtilemap

Address Range	Length	Label/Location	Description
0x0000-0xFFFF	65536	gt11.11	CRC(b4f0fcf0) (Fluke: AE0C)
0x0000-0xFFFF	65536	gt11.11	CRC(b4f0fcf0) (Fluke: AE0C)

Memory Area:bgtiles

Address Range	Length	Label/Location	Description
0x0000-0x3FFFF	262144	pi8914.b14	CRC(207d6187) (Fluke: B838)
0x0000-0x3FFFF	262144	pi8914.b14	CRC(207d6187) (Fluke: B838)

Memory Area:chars

Address Range	Length	Label/Location	Description
0x0000-0x7FFF	32768	gt15.b15	CRC(ac652412) (Fluke: A586)
0x0000-0x7FFF	32768	gt15.b15	CRC(ac652412) (Fluke: A586)

Memory Area:fgtiles

Address Range	Length	Label/Location	Description
0x0000-0x3FFFF	262144	pi8916.h16	CRC(7cffe0f6) (Fluke: FC9B)
0x0000-0x3FFFF	262144	pi8916.h16	CRC(7cffe0f6) (Fluke: FC9B)

Memory Area:sprites

Address Range	Length	Label/Location	Description
0x0000-0x7FFFF	524288	pi8910.k14	CRC(5a101b0b) (Fluke: 9163)
0x0000-0x7FFFF	524288	pi8910.k14	CRC(5a101b0b) (Fluke: 9163)
0x80000-0x9FFFF	131072	gt5.5	CRC(3d3ab273) (Fluke: 4FC1)
0x80000-0x9FFFF	131072	gt5.5	CRC(3d3ab273) (Fluke: 4FC1)

Memory Area:upd

Address Range	Length	Label/Location	Description
0x0000-0x1FFFF	131072	gt4.4	CRC(85dfb9ec) (Fluke: 6A44)
0x0000-0x1FFFF	131072	gt4.4	CRC(85dfb9ec) (Fluke: 6A44)