Touchdown 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.

Touchdown (Gottlieb, 1984)

Memory Area:gts80a_map

Address Range	Length	Function	Description
0x0000-0x017F	384	RAM
0x0200-0x027F	128	Device Read/Write	riot1, riot6532_device, read, write
0x0280-0x02FF	128	Device Read/Write	riot2, riot6532_device, read, write
0x0300-0x037F	128	Device Read/Write	riot3, riot6532_device, read, write
0x1000-0x17FF	2048	ROM
0x1800-0x18FF	256	RAM, Shared	nvram (// 5101L-1 256x4)
0x2000-0x2FFF	4096	ROM
0x3000-0x3FFF	4096	ROM

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:maincpu

Address Range	Length	Label/Location	Description
0x1000-0x17FF	2048	688.cpu	CRC(e531ab3f)
0x2000-0x2FFF	4096	u2_80a.bin	CRC(241de1d4)
0x3000-0x3FFF	4096	u3_80a.bin	CRC(2d77ccdc)

Memory Area:r0sound:audiocpu

Address Range	Length	Label/Location	Description
0x0800-0x0FFF	2048	688-s.snd	CRC(5e9988a6)