1942 Memory Map

Memory Area:cart

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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.

1942 (Capcom, 1987)

Memory Area:bios_io_map

Address Range	Length	Function	Description
0x0000	1	Read Port, Write	BIOS, pc10_SDCS_w
0x0001	1	Read Port, Write	SW1, pc10_CNTRLMASK_w
0x0002	1	Read Port, Write	SW2, pc10_DISPMASK_w
0x0003	1	Read/Write	pc10_detectclr_r, pc10_SOUNDMASK_w
0x0004	1	Write	pc10_GAMERES_w
0x0005	1	Write	pc10_GAMESTOP_w
0x0006-0x0007	2	Write NOP
0x0008	1	Write	pc10_NMIENABLE_w
0x0009	1	Write	pc10_DOGDI_w
0x000A	1	Write	pc10_PPURES_w
0x000B-0x000E	4	Write	pc10_CARTSEL_w
0x000F	1	Write	up8w_w
0x0010-0x0013	4	Write, Shared	time_w, timedata

Memory Area:bios_map

Address Range	Length	Function	Description
0x0000-0x3FFF	16384	ROM
0x8000-0x87FF	2048	RAM	(// 8V)
0x8800-0x8FFF	2048	Read/Write, Shared	ram_8w_r, ram_8w_w, ram_8w (// 8W)
0x9000-0x97FF	2048	RAM Write, Shared	playch10_videoram_w, videoram
0xC000-0xDFFF	8192	ROM
0xE000-0xFFFF	8192	Read/Write	pc10_prot_r, pc10_prot_w

Memory Area:cart_map

Address Range	Length	Function	Description
0x0000-0x07FF	2048	RAM, Mirror, Shared	0x1800, work_ram
0x2000-0x3FFF	8192	Device Read/Write	ppu, ppu2c0x_device, read, write
0x4014	1	Write	sprite_dma_w
0x4016	1	Read/Write	pc10_in0_r, pc10_in0_w
0x4017	1	Read	pc10_in1_r (/* IN1 - input port 2 / PSG second control register */)
0x8000-0xFFFF	32768	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.

0xC000-0xDFFF

8192

CRC(415b8807),extra bios code for this game (Fluke: 9B4A)

Address Range	Length	Label/Location	Description
0x8000-0xFFFF	32768	u1	CRC(c4e8c04a) (Fluke: D282)