Space Chaser 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.

Space Chaser (Taito, 1979)

Memory Area:schaser_io_map

Address Range

Length

Function

Description

0x0000

Read Port

IN0

0x0001	Joystick Up	Active High
0x0002	Joystick Left	Active High
0x0004	Joystick Down	Active High
0x0008	Joystick Right	Active High
0x0010	Button 1	Active High
0x0000	3	Active High
0x0020	4	Active High
0x0040	5	Active High
0x0060	6	Active High
0x0080	Unused	Active High

0x0001

Read Port

IN1

0x0001	Joystick Up	Active High
0x0002	Joystick Left	Active High
0x0004	Joystick Down	Active High
0x0008	Joystick Right	Active High
0x0010	Button 1	Active High
0x0020	Start 2	Active High
0x0040	Start 1	Active High
0x0080	Coin 1	Active High

0x0002

Read Port, Device Write

IN2, mb14241, mb14241_device, shift_count_w

0x0003	Lives	Active High
0x0000	3	Active High
0x0001	4	Active High
0x0002	5	Active High
0x0003	6	Active High
0x0008	Difficulty	Active High
0x0000	Easy	Active High
0x0008	Hard	Active High
0x0010	Name Reset	Active High
0x0020	Tilt	Active High
0x0040	Cabinet	Active High
0x0000	Upright	Active High
0x0040	Cocktail	Active High
0x0080	Unused	Active High

0x0003

Device Read, Write

mb14241, mb14241_device, shift_result_r, schaser_sh_port_1_w

0x0004

Device Write

mb14241, mb14241_device, shift_data_w

0x0005

Write

schaser_sh_port_2_w

0x0006

Device Write

watchdog, watchdog_timer_device, reset_w

Memory Area:schaser_map

Address Range	Length	Function	Description
0x0000-0x1FFF	8192	ROM
0x2000-0x3FFF	8192	RAM, Shared	main_ram
0x4000-0x5FFF	8192	ROM
0xC000-0xDFFF	8192	Read/Write	schaser_scattered_colorram_r, schaser_scattered_colorram_w

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
0x0000-0x03FF	1024	rt13.bin	CRC(0dfbde68)
0x0000-0x03FF	1024	rt13.bin	CRC(0dfbde68) (Fluke: 924C)
0x0400-0x07FF	1024	rt14.bin	CRC(5a508a25) (Fluke: D71C)
0x0800-0x0BFF	1024	rt15.bin	CRC(2ac43a93) (Fluke: 438E)
0x0800-0x0BFF	1024	rt15.bin	CRC(2ac43a93)
0x0800-0x0BFF	1024	rt15.bin	CRC(2ac43a93) (Fluke: 438E)
0x0C00-0x0FFF	1024	rt16.bin	CRC(f5583afc) (Fluke: E4E1)
0x0C00-0x0FFF	1024	rt16.bin	CRC(f5583afc) (Fluke: E4E1)
0x1000-0x13FF	1024	rt17.bin	CRC(51cf1155)
0x1000-0x13FF	1024	rt17.bin	CRC(51cf1155) (Fluke: 08A7)
0x1000-0x13FF	1024	rt17.bin	CRC(51cf1155) (Fluke: 08A7)
0x1400-0x17FF	1024	rt18.bin	CRC(3f0fc73a) (Fluke: BF3D)
0x1400-0x17FF	1024	rt18.bin	CRC(3f0fc73a) (Fluke: BF3D)
0x1800-0x1BFF	1024	rt19.bin	CRC(b66ea369)
0x1800-0x1BFF	1024	rt19.bin	CRC(b66ea369) (Fluke: 854C)
0x1800-0x1BFF	1024	rt19.bin	CRC(b66ea369) (Fluke: 854C)
0x1C00-0x1FFF	1024	rt20.bin	CRC(e3a7466a) (Fluke: 416C)
0x4000-0x43FF	1024	rt21.bin	CRC(b368ac98) (Fluke: 916A)
0x4000-0x43FF	1024	rt21.bin	CRC(b368ac98)
0x4000-0x43FF	1024	rt21.bin	CRC(b368ac98) (Fluke: 916A)
0x4400-0x47FF	1024	rt22.bin	CRC(6e060dfb) (Fluke: 33C4)
0x4400-0x47FF	1024	rt22.bin	CRC(6e060dfb) (Fluke: 33C4)

Memory Area:proms

Address Range	Length	Label/Location	Description
0x0000-0x03FF	1024	rt06.ic2	CRC(950cf973) (Fluke: CDC5)
0x0000-0x03FF	1024	rt06.ic2	CRC(950cf973) (Fluke: CDC5)
0x0000-0x03FF	1024	rt06.ic2	CRC(950cf973) (Fluke: CDC5)
0x0000-0x03FF	1024	rt06.ic2	CRC(950cf973) (Fluke: CDC5)