Mega Zone 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.

Mega Zone (Konami, 1983)

Memory Area:megazone_i8039_io_map

Address Range	Length	Function	Description
0x0000-0x00FF	256	Device Read	soundlatch, generic_latch_8_device, read
0x0000	1	Device Write	dac, dac_byte_interface, write
0x0000	1	Write	i8039_irqen_and_status_w

Memory Area:megazone_i8039_map

Address Range	Length	Function	Description
0x0000-0x0FFF	4096	ROM

Memory Area:megazone_map

Address Range	Length	Function	Description
0x0000-0x0001	2	Write	megazone_coin_counter_w (/* coin counter 2, coin counter 1 */)
0x0005	1	Write	megazone_flipscreen_w
0x0007	1	Write	irq_mask_w
0x0800	1	Device Write	watchdog, watchdog_timer_device, reset_w
0x1000	1	Write Only, Shared	scrolly
0x1800	1	Write Only, Shared	scrollx
0x2000-0x23FF	1024	RAM, Shared	videoram
0x2400-0x27FF	1024	RAM, Shared	videoram2
0x2800-0x2BFF	1024	RAM, Shared	colorram
0x2C00-0x2FFF	1024	RAM, Shared	colorram2
0x3000-0x33FF	1024	RAM, Shared	spriteram
0x3800-0x3FFF	2048	RAM, Shared	share1
0x4000-0xFFFF	49152	ROM	(/* 4000->5FFF is a debug rom */)

Memory Area:megazone_sound_io_map

Address Range	Length	Function	Description
0x0000-0x0002	3	Device Read	aysnd, ay8910_device, data_r
0x0000	1	Device Write	aysnd, ay8910_device, address_w
0x0002	1	Device Write	aysnd, ay8910_device, data_w

Memory Area:megazone_sound_map

Address Range

Length

Function

Description

0x0000-0x1FFF

8192

ROM

0x2000

Write

megazone_i8039_irq_w (/* START line. Interrupts 8039 */)

0x4000

Device Write

soundlatch, generic_latch_8_device, write (/* CODE line. Command Interrupts 8039 */)

0x6000

Read Port

IN0 (/* IO Coin */)

0x6001

Read Port

IN1 (/* P1 IO */)

0x6002

Read Port

IN2 (/* P2 IO */)

0x8000

Read Port

DSW2

0x0003	Lives	Active High
0x0003	3	Active High
0x0002	4	Active High
0x0001	5	Active High
0x0000	7	Active High
0x0004	Cabinet	Active High
0x0000	Upright	Active High
0x0004	Cocktail	Active High
0x0018	Bonus_Life	Active High
0x0018	20k 70k 70k+	Active High
0x0010	20k 80k 80k+	Active High
0x0008	30k 90k 90k+	Active High
0x0000	30k 100k 100k+	Active High
0x0060	Difficulty	Active High
0x0060	Easy	Active High
0x0040	Normal	Active High
0x0020	Hard	Active High
0x0000	Hardest	Active High
0x0080	Demo_Sounds	Active High
0x0080	Off	Active High
0x0000	On	Active High

0x8001

Read Port

DSW1

0xA000

Write NOP

(/* INTMAIN - Interrupts main CPU (unused) */)

0xC000

Write NOP

(/* INT (Actually is NMI) enable/disable (unused)*/)

0xC001

Device Write

watchdog, watchdog_timer_device, reset_w

0xE000-0xE7FF

2048

RAM, Shared

share1

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	319e02.bin	CRC(d5d45edb) (Fluke: C58B)

Memory Area:daccpu

Address Range	Length	Label/Location	Description
0x0000-0x0FFF	4096	319e01.bin	CRC(ed5725a0) (Fluke: 62AB)

Memory Area:gfx1

Address Range	Length	Label/Location	Description
0x0000-0x1FFF	8192	319e11.bin	CRC(965a7ff6) (Fluke: EE00)
0x0000-0x1FFF	8192	319e11.bin	CRC(965a7ff6) (Fluke: EE00)
0x2000-0x3FFF	8192	319e09.bin	CRC(5eaa7f3e) (Fluke: 38CA)
0x2000-0x3FFF	8192	319e09.bin	CRC(5eaa7f3e) (Fluke: 38CA)
0x4000-0x5FFF	8192	319e10.bin	CRC(7bb1aeee) (Fluke: 4B18)
0x4000-0x5FFF	8192	319e10.bin	CRC(7bb1aeee) (Fluke: 4B18)
0x6000-0x7FFF	8192	319e08.bin	CRC(6add71b1) (Fluke: 4685)
0x6000-0x7FFF	8192	319e08.bin	CRC(6add71b1) (Fluke: 4685)

Memory Area:gfx2

Address Range	Length	Label/Location	Description
0x0000-0x1FFF	8192	319e12.bin	CRC(e0fb7835) (Fluke: EB01)
0x0000-0x1FFF	8192	319e12.bin	CRC(e0fb7835) (Fluke: EB01)
0x2000-0x3FFF	8192	319e13.bin	CRC(3d8f3743) (Fluke: E8AF)

Memory Area:maincpu

Address Range	Length	Label/Location	Description
0x6000-0x7FFF	8192	319i07.bin	CRC(94b22ea8) (Fluke: 739F)
0x8000-0x9FFF	8192	319i06.bin	CRC(0468b619) (Fluke: A626)
0xA000-0xBFFF	8192	319i05.bin	CRC(ac59000c) (Fluke: D7A0)
0xC000-0xDFFF	8192	319i04.bin	CRC(1e968603) (Fluke: 3839)
0xE000-0xFFFF	8192	319i03.bin	CRC(0888b803) (Fluke: 6DA5)

Memory Area:proms

Address Range	Length	Label/Location	Description
0x0000-0x001F	32	319b18.a16	CRC(23cb02af),palette (Fluke: C880)
0x0000-0x001F	32	319b18.a16	CRC(23cb02af),palette (Fluke: C880)
0x0020-0x011F	256	319b16.c6	CRC(5748e933),sprite lookup table (Fluke: C3B0)
0x0020-0x011F	256	319b16.c6	CRC(5748e933),sprite lookup table (Fluke: C3B0)
0x0120-0x021F	256	319b17.a11	CRC(1fbfce73),character lookup table (Fluke: 6EC1)
0x0120-0x021F	256	319b17.a11	CRC(1fbfce73),character lookup table (Fluke: 6EC1)
0x0220-0x023F	32	319b14.e7	CRC(55044268),timing (not used) (Fluke: 6EB3)
0x0220-0x023F	32	319b14.e7	CRC(55044268),timing (not used) (Fluke: 6EB3)
0x0240-0x025F	32	319b15.e8	CRC(31fd7ab9),timing (not used) (Fluke: 279B)
0x0240-0x025F	32	319b15.e8	CRC(31fd7ab9),timing (not used) (Fluke: 279B)