Return of the Invaders 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.

Return of the Invaders (bootleg, 1985)

Memory Area:main_map

Address Range	Length	Function	Description
0x0000-0x5FFF	24576	ROM
0x7B00-0x7BFF	256	ROM	(/* space for diagnostic ROM? The code looks */)
0x7FFF	1	Write	coincounter_w
0x8000-0x87FF	2048	RAM Write, Shared	fg_videoram_w, fg_videoram
0x8800-0x9FFF	6144	RAM, Shared	sharedram
0xA000-0xA7FF	2048	RAM Write, Shared	bg_videoram_w, bg_videoram
0xB800-0xB802	3	Write	gfx_ctrl_w
0xC000	1	Read Port	P1
0xC001	1	Read Port	P2
0xC002	1	Read NOP	(/* bit 7 must be 0, otherwise game resets */)
0xC003	1	Read	mcu_status_r
0xC004	1	Read Port	SYSTEM
0xC005	1	Read Port	DSW1
0xC006	1	Read Port	DSW2
0xC007	1	Read Port	DSW3
0xC800	1	Write	irq0_ack_w
0xC801	1	Write	coinlockout_w
0xC802	1	Write	cpu2_reset_w
0xC803	1	Write	mcu_reset_w
0xC805	1	Write	cpu1_reset_w
0xD000	1	Device Write	watchdog, watchdog_timer_device, reset_w
0xD800	1	Write	soundcommand_w
0xE000	1	Read	mcu_r
0xE800	1	Write	mcu_w
0xF800	1	Read	cpu0_mf800_r

Memory Area:mcu_map

Address Range	Length	Function	Description
0x0000	1	Read/Write	mcu_portA_r, mcu_portA_w
0x0001	1	Read/Write	mcu_portB_r, mcu_portB_w
0x0002	1	Read/Write	mcu_portC_r, mcu_portC_w
0x0004	1	Write	mcu_ddrA_w
0x0005	1	Write	mcu_ddrB_w
0x0006	1	Write	mcu_ddrC_w
0x0010-0x007F	112	RAM
0x0080-0x07FF	1920	ROM

Memory Area:sound_map

Address Range	Length	Function	Description
0x0000-0x1FFF	8192	ROM
0x2000-0x27FF	2048	RAM
0x4000	1	Device Read	soundlatch, generic_latch_8_device, read
0x6000	1	Write	cpu2_m6000_w
0x8000	1	Device Write	sn1, sn76496_device, write
0xA000	1	Device Write	sn2, sn76496_device, write
0xE000-0xFFFF	8192	ROM	(/* space for diagnostic ROM */)

Memory Area:sub_map

Address Range	Length	Function	Description
0x0000-0x1FFF	8192	ROM
0x8000-0x87FF	2048	RAM Write, Shared	fg_videoram_w, fg_videoram
0x8800-0x9FFF	6144	RAM, Shared	sharedram
0xA000-0xA7FF	2048	RAM Write, Shared	bg_videoram_w, bg_videoram
0xC804	1	Write	irq1_ack_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
0x0000-0x1FFF	8192	a37-05.17	CRC(9025abea) (Fluke: C83E)
0x0000-0x1FFF	8192	a37-05.17	CRC(9025abea) (Fluke: C83E)

Memory Area:gfx1

Address Range	Length	Label/Location	Description
0x0000-0x1FFF	8192	a37-16.61	CRC(4e3f501c) (Fluke: 2FAF)
0x0000-0x1FFF	8192	a37-16.61	CRC(4e3f501c) (Fluke: 2FAF)

Memory Area:gfx2

Address Range	Length	Label/Location	Description
0x0000-0x1FFF	8192	a37-10.8	CRC(6afdeec8) (Fluke: A5E5)
0x0000-0x1FFF	8192	a37-10.8	CRC(6afdeec8) (Fluke: A5E5)
0x2000-0x3FFF	8192	a37-11.9	CRC(d3dc9da3) (Fluke: 8E97)
0x2000-0x3FFF	8192	a37-11.9	CRC(d3dc9da3) (Fluke: 8E97)
0x4000-0x5FFF	8192	a37-12.10	CRC(d10b2eed) (Fluke: D796)
0x4000-0x5FFF	8192	a37-12.10	CRC(d10b2eed) (Fluke: D796)
0x6000-0x7FFF	8192	a37-13.11	CRC(00ca6b3d) (Fluke: 0ACE)
0x6000-0x7FFF	8192	a37-13.11	CRC(00ca6b3d) (Fluke: 0ACE)

Memory Area:gfx3

Address Range	Length	Label/Location	Description
0x0000-0x1FFF	8192	a37-14.55	CRC(ef7f8651) (Fluke: 825D)
0x0000-0x1FFF	8192	a37-14.55	CRC(ef7f8651) (Fluke: 825D)
0x2000-0x3FFF	8192	a37-15.56	CRC(03b40905) (Fluke: 8B2A)
0x2000-0x3FFF	8192	a37-15.56	CRC(03b40905) (Fluke: 8B2A)

Memory Area:maincpu

Address Range	Length	Label/Location	Description
0x0000-0x1FFF	8192	roi.02	CRC(d98fd462) (Fluke: D33F)
0x2000-0x3FFF	8192	roi.01b	CRC(3379f930) (Fluke: 3453)
0x2000-0x3FFF	8192	roi.01b	CRC(3379f930) (Fluke: 3453)
0x4000-0x5FFF	8192	roi.01	CRC(57679062) (Fluke: 3425)

Memory Area:proms

Address Range	Length	Label/Location	Description
0x0000-0x00FF	256	a37-06.13	CRC(e9643b8b),palette red bits (Fluke: 18B1)
0x0000-0x00FF	256	a37-06.13	CRC(e9643b8b),palette red bits (Fluke: 18B1)
0x0100-0x01FF	256	a37-07.4	CRC(e8f34e11),palette green bits (Fluke: 1707)
0x0100-0x01FF	256	a37-07.4	CRC(e8f34e11),palette green bits (Fluke: 1707)
0x0200-0x02FF	256	a37-08.3	CRC(50030af0),palette blue bits (Fluke: 2E7A)
0x0200-0x02FF	256	a37-08.3	CRC(50030af0),palette blue bits (Fluke: 2E7A)
0x0300-0x0AFF	2048	82s191n	CRC(93c891e3),lookup table (Fluke: 7295)
0x0300-0x0AFF	2048	82s191n	CRC(93c891e3),lookup table (Fluke: 7295)

Memory Area:sub

Address Range	Length	Label/Location	Description
0x0000-0x1FFF	8192	a37-04.62	CRC(d2899cc1) (Fluke: F65D)
0x0000-0x1FFF	8192	a37-04.62	CRC(d2899cc1) (Fluke: F65D)