Diamond Derby 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.

Diamond Derby (Electrocoin, 1994)

Memory Area:dderby_sound_map

Address Range	Length	Function	Description
0x0000-0x0FFF	4096	ROM
0x1000	1	RAM	(//???)
0x4000-0x4001	2	Device Write	ay1, ay8910_device, address_data_w
0x4000	1	Device Read	soundlatch, generic_latch_8_device, read
0x4001	1	Device Read	ay1, ay8910_device, data_r
0x6000-0x67FF	2048	RAM

Memory Area:memmap

Address Range	Length	Function	Description
0x0000-0x5FFF	24576	ROM
0x8000-0x8FFF	4096	RAM, Shared	nvram
0xC000-0xC007	8	Write	output_w
0xC000-0xC007	8	Read	input_r
0xC802	1	Read Port	DSW1
0xC803	1	Read Port	DSW2
0xCA00	1	Write NOP	(//(vblank_irq_w) //???)
0xCA01	1	Write NOP	(//watchdog)
0xCA02	1	RAM Write	dderby_sound_w
0xCA03	1	Write NOP	(//(timer_irq_w) //???)
0xCC00-0xCC05	6	RAM, Shared	scroll_ram
0xCE08-0xCE1F	24	RAM, Shared	sprite_ram (// horse sprites)
0xD000-0xD3FF	1024	RAM, Shared	vidchars (// char ram)
0xD400-0xD7FF	1024	RAM, Shared	vidattribs (// colours/ attrib ram)

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
0x0000-0x0FFF	4096	dd03.j9	CRC(660f0cae)

Memory Area:gfx1

Address Range	Length	Label/Location	Description
0x0000-0x1FFF	8192	dd01.e1	CRC(2e120288)
0x2000-0x3FFF	8192	dd02.e2	CRC(ca028c8c)

Memory Area:gfx2

Address Range	Length	Label/Location	Description
0x0000-0x1FFF	8192	dd07.b1	CRC(207a534a)
0x2000-0x3FFF	8192	dd08.b2	CRC(f380e2c4)
0x4000-0x5FFF	8192	dd09.b3	CRC(68ebf74c)
0x6000-0x6FFF	4096	dd10.b5	CRC(38b1568a)
0x8000-0x9FFF	8192	dd11.d1	CRC(fe615561)
0xA000-0xBFFF	8192	dd12.d2	CRC(4df63aae)
0xC000-0xDFFF	8192	dd13.d4	CRC(cace0dfc)
0xE000-0xEFFF	4096	dd14.d5	CRC(2c602cbe)
0x10000-0x11FFF	8192	dd15.e1	CRC(2ce23b64)
0x12000-0x13FFF	8192	dd16.e2	CRC(6af9796c)
0x14000-0x15FFF	8192	dd17.e4	CRC(b451cde2)
0x16000-0x16FFF	4096	dd18.e5	CRC(56228aaf)

Memory Area:gfx3

Address Range	Length	Label/Location	Description
0x0000-0x1FFF	8192	dd19.n2	CRC(fd536051)
0x2000-0x3FFF	8192	dd20.n3	CRC(1497e52f)
0x4000-0x5FFF	8192	dd21.n4	CRC(87605d44)

Memory Area:maincpu

Address Range	Length	Label/Location	Description
0x0000-0x1FFF	8192	dd04.m6	CRC(a3cfd28e)
0x2000-0x3FFF	8192	dd05.m7	CRC(16f7ac0b)
0x4000-0x5FFF	8192	dd06.m8	CRC(914ba8f5)

Memory Area:proms

Address Range	Length	Label/Location	Description
0x0000-0x001F	32	ddprom3.h5	CRC(aea3cff6)

Memory Area:proms2

Address Range	Length	Label/Location	Description
0x0000-0x00FF	256	ddprom4.h10	CRC(7280f000)
0x0100-0x01FF	256	ddprom5.k1	CRC(15edbdac)
0x0200-0x02FF	256	ddprom1.c1	CRC(e1c2fa1b)

Memory Area:proms3

Address Range	Length	Label/Location	Description
0x0000-0x00FF	256	ddprom2.j5	CRC(3e5402dc)
0x0100-0x01FF	256	ddprom6.m12	CRC(7f677b7d)

Memory Area:user1

Address Range	Length	Label/Location	Description
0x0000-0x1FFF	8192	dd22.n6	CRC(db6b13fc)
0x2000-0x3FFF	8192	dd23.n7	CRC(595fdb9b)