Boulder Dash Memory Map

Contributors
Contributors
- Contributor Account
- Sign Up
On-Line Databases
On-Line Databases
Main
Main
Education
Education
My Restorations
My Restorations
- Restorations
- Conversions
Restoring Games
Restoring Games
Repairing Games
Repairing Games
Resources
Resources
Miscellaneous
Miscellaneous

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.

Boulder Dash (Exidy / First Star Software, 1984)

Memory Area:a600xl_mem

Address Range	Length	Function	Description
0x0000-0x3FFF	16384	RAM
0x5000-0x57FF	2048	ROM, Region	maincpu, 0xd000 (/* self test */)
0x8000-0xBFFF	16384	ROM	(/* game cartridge */)
0xC000-0xCFFF	4096	ROM	(/* OS */)
0xD000-0xD0FF	256	Device Read/Write	gtia, gtia_device, read, write
0xD100-0xD1FF	256	Read/Write NOP
0xD200-0xD2FF	256	Device Read/Write	pokey, pokey_device, read, write
0xD300-0xD3FF	256	Device Read/Write	pia, pia6821_device, read_alt, write_alt
0xD400-0xD4FF	256	Device Read/Write	antic, antic_device, read, write
0xD500-0xD7FF	768	Read/Write NOP
0xD800-0xFFFF	10240	ROM	(/* OS */)

Memory Area:mcu_mem

Address Range	Length	Function	Description
0x0000	1	Read, Write	mcu_portA_r, mcu_portA_w
0x0001	1	Read, Write	mcu_portB_r, mcu_portB_w
0x0002	1	Read, Write	mcu_portC_r, mcu_portC_w
0x0004	1	Read, Write	mcu_ddr_r, mcu_portA_ddr_w
0x0005	1	Read, Write	mcu_ddr_r, mcu_portB_ddr_w
0x0006	1	Read, Write	mcu_ddr_r, mcu_portC_ddr_w
0x0008	1	Read, Write	mcu_tdr_r, mcu_tdr_w
0x0009	1	Read, Write	mcu_tcr_r, mcu_tcr_w
0x0010-0x007F	112	RAM
0x0080-0x07FF	1920	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
0x8000-0x9FFF	8192	bd-acs-1.rom	CRC(2b11750e) (Fluke: 8BEB)
0xA000-0xBFFF	8192	bd-acs-2.rom	CRC(e9ea2658) (Fluke: AAEB)
0xC000-0xFFFF	16384	atarixl.rom	CRC(1f9cd270) (Fluke: 01BD)

Memory Area:mcu

Address Range	Length	Label/Location	Description
0x0000-0x07FF	2048	maxaflex.uc	CRC(fe9cf53c) (Fluke: 229C)

Memory Area:proms

Address Range	Length	Label/Location	Description
0x0000-0x01FF	512	maxprom.prm	CRC(edf5c950),for simulating keystrokes ? (Fluke: CF42)