Andromeda 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.

Andromeda (IPM, 1979)

Memory Area:m10_main

Address Range	Length	Function	Description
0x0000-0x02FF	768	RAM, Shared	memory (/* scratch ram */)
0x1000-0x2FFF	8192	ROM, Shared	rom
0x4000-0x43FF	1024	RAM, Shared	videoram
0x4800-0x4BFF	1024	RAM Write, Shared	m10_colorram_w, colorram (/* foreground colour */)
0x5000-0x53FF	1024	RAM Write, Shared	m10_chargen_w, chargen (/* background ????? */)
0xA200	1	Read Port	DSW
0xA300	1	Read Port	INPUTS
0xA400	1	Write	m10_ctrl_w (/* line at bottom of screen?, sound, flip screen */)
0xA500	1	Write	m10_a500_w (/* ??? */)
0xA700	1	Read	m10_a700_r
0xFC00-0xFFFF	1024	ROM	(/* for the reset / interrupt vectors */)

Memory Area:m11_main

Address Range	Length	Function	Description
0x0000-0x02FF	768	RAM, Shared	memory (/* scratch ram */)
0x1000-0x2FFF	8192	ROM, Shared	rom
0x4000-0x43FF	1024	RAM, Shared	videoram
0x4800-0x4BFF	1024	RAM Write, Shared	m10_colorram_w, colorram (/* foreground colour */)
0x5000-0x53FF	1024	RAM, Shared	chargen (/* background ????? */)
0xA100	1	Write	m11_a100_w (/* sound writes ???? */)
0xA200	1	Read Port	DSW
0xA300	1	Read Port	INPUTS
0xA400	1	Write	m11_ctrl_w (/* line at bottom of screen?, sound, flip screen */)
0xA700	1	Read	m11_a700_r
0xFC00-0xFFFF	1024	ROM	(/* for the reset / interrupt vectors */)

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:gfx1

Address Range	Length	Label/Location	Description
0x0000-0x03FF	1024	am9	CRC(a1c8f4db) (Fluke: 0CFB)
0x0400-0x07FF	1024	am10	CRC(be2de8f3) (Fluke: 6C64)

Memory Area:maincpu

Address Range	Length	Label/Location	Description
0x1000-0x13FF	1024	am1	CRC(53df0152) (Fluke: D466)
0x1400-0x17FF	1024	am2	CRC(dab64957) (Fluke: 0190)
0x1800-0x1BFF	1024	am3	CRC(f983f35c) (Fluke: 6F9A)
0x1C00-0x1FFF	1024	am4	CRC(09f20717) (Fluke: 3AA9)
0x2000-0x23FF	1024	am5	CRC(518a3b88) (Fluke: 7213)
0x2400-0x27FF	1024	am6	CRC(ce3d5fff) (Fluke: 3ABA)
0x2800-0x2BFF	1024	am7	CRC(30d3366f) (Fluke: 4AC8)
0x2C00-0x2FFF	1024	am8