Fire Barrel 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.

Fire Barrel (Irem, 1993)

Memory Area:main_map

Address Range	Length	Function	Description
0x0000-0x9FFFF	655360	ROM
0xA0000-0xBFFFF	131072	ROM Bank	bank1
0xD0000-0xDFFFF	65536	RAM Write, Shared	vram_w, vram_data
0xE0000-0xEFFFF	65536	RAM	(/* System ram */)
0xF8000-0xF8FFF	4096	RAM, Shared	spriteram
0xF9000-0xF9FFF	4096	RAM Device Write, Shared	palette, palette_device, write, palette
0xFFFF0-0xFFFFF	16	ROM, Region	maincpu, 0x7fff0

Memory Area:main_portmap

Address Range	Length	Function	Description
0x0000-0x0001	2	Write	soundlatch_w
0x0000-0x0001	2	Read Port	P1_P2
0x0002-0x0003	2	Read Port	COINS_DSW3
0x0002-0x0003	2	Write	coincounter_w
0x0004-0x0005	2	Write NOP	(/* ??? 0008 */)
0x0004-0x0005	2	Read Port	DSW
0x0006-0x0007	2	Read Port	P3_P4
0x0008-0x0009	2	Read	sound_status_r (/* answer from sound CPU */)
0x0040-0x0043	4	Device Read/Write 8-bit	upd71059c, pic8259_device, read, write, 0x00ff
0x0080-0x009F	32	Write	control_w
0x00A0-0x00AF	16	Write NOP	(/* Written with 0's in interrupt */)
0x00B0-0x00B1	2	Write	spritebuffer_w
0x00C0-0x00C1	2	Write	sound_reset_w
0x00C0-0x00C3	4	Read NOP	(/* Only wpksoc: ticket related? */)

Memory Area:sound_map

Address Range	Length	Function	Description
0x0000-0x1FFFF	131072	ROM
0xA0000-0xA3FFF	16384	RAM
0xA8000-0xA803F	64	Device Read/Write 8-bit	irem, iremga20_device, irem_ga20_r, irem_ga20_w, 0x00ff
0xA8040-0xA8043	4	Device Read/Write 8-bit	ymsnd, ym2151_device, read, write, 0x00ff
0xA8044-0xA8045	2	Read/Write	soundlatch_r, sound_irq_ack_w
0xA8046-0xA8047	2	Write	sound_status_w
0xFFFF0-0xFFFFF	16	ROM, Region	soundcpu, 0x1fff0

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:irem

Address Range	Length	Label/Location	Description
0x0000-0x7FFFF	524288	f4-b-da0.da0	CRC(7a493e2e),IC24 (== w96.da0 from Air Assault) (Fluke: D200)