Frog & Spiders 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.

Frog & Spiders (Taito Corporation, 1981)

Memory Area:fspider_map

Address Range	Length	Function	Description
0x0000-0x7FFF	32768	ROM
0x8000-0x87FF	2048	RAM
0x8FF8	1	Device Write	aysnd, ay8910_device, address_w
0x8FF8	1	Read Port	DSW1
0x8FF9	1	Read Port	INPUTS
0x8FFA	1	Read Port, Device Write	SYSTEM, aysnd, ay8910_device, data_w
0x8FFC	1	Write	jollyjgr_misc_w
0x8FFD	1	Write	jollyjgr_coin_lookout_w
0x8FFF	1	Read Port	DSW2
0x9000-0x93FF	1024	RAM Write, Shared	jollyjgr_videoram_w, videoram
0x9800-0x983F	64	RAM Write, Shared	jollyjgr_attrram_w, colorram
0x9840-0x987F	64	RAM, Shared	spriteram
0x9880-0x989F	32	RAM	(// ?)
0x98A0-0x98AF	16	RAM, Shared	bulletram
0x98B0-0x9BFF	848	RAM	(// ?)
0xA000-0xFFFF	24576	RAM, Shared	bitmap

Memory Area:jollyjgr_map

Address Range	Length	Function	Description
0x0000-0x7FFF	32768	ROM
0x8000-0x87FF	2048	RAM
0x8FF8	1	Read Port	DSW1
0x8FF8	1	Device Write	aysnd, ay8910_device, address_w
0x8FF9	1	Read Port	INPUTS
0x8FFA	1	Read Port, Device Write	SYSTEM, aysnd, ay8910_device, data_w
0x8FFC	1	Write	jollyjgr_misc_w
0x8FFD	1	Write	jollyjgr_coin_lookout_w
0x8FFF	1	Read Port	DSW2
0x9000-0x93FF	1024	RAM Write, Shared	jollyjgr_videoram_w, videoram
0x9800-0x983F	64	RAM Write, Shared	jollyjgr_attrram_w, colorram
0x9840-0x987F	64	RAM, Shared	spriteram
0x9880-0x9BFF	896	RAM
0xA000-0xFFFF	24576	RAM, Shared	bitmap

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:gfx_bank

Address Range	Length	Label/Location	Description
0x0000-0x0FFF	4096	8.1c	CRC(4e39abad)
0x1000-0x1FFF	4096	9.2c	CRC(04dd1604)
0x2000-0x2FFF	4096	10.5h	CRC(d4bce323)
0x3000-0x3FFF	4096	11.7h	CRC(7ab56309)

Memory Area:maincpu

Address Range	Length	Label/Location	Description
0x0000-0x0FFF	4096	1.5l	CRC(3679cab1)
0x2000-0x2FFF	4096	6.8h	CRC(329d4716)
0x3000-0x3FFF	4096	7.8j	CRC(a7d8fc3c)
0x4000-0x4FFF	4096	5.8f	CRC(0457de7b)
0x5000-0x5FFF	4096	4.8e	CRC(26add629)
0x6000-0x6FFF	4096	3.8c	CRC(f74f83d9)
0x7000-0x7FFF	4096	2.8b	CRC(6e543acf)

Memory Area:proms

Address Range	Length	Label/Location	Description
0x0000-0x001F	32	82s123.1f	CRC(cda6001a)