Fast Invaders 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.

Fast Invaders (Fiberglass, 1979)

Memory Area:fastinvaders_6845_io

Address Range	Length	Function	Description
0x0010-0x001F	16	Device Read/Write	dma8257, i8257_device, read, write
0x0020	1	Device Write	6845, mc6845_device, address_w
0x0021	1	Device Read/Write	6845, mc6845_device, register_r, register_w
0x0030-0x0033	4	Device Read/Write	pic8259, pic8259_device, read, write
0x0040-0x004F	16	Write	io_40_w (//ds4 //latch)
0x0060	1	Read	io_60_r
0x0070	1	Write	io_70_w (//ds7 rest55,rest65,trap, irq0 clear)
0x0080	1	Read/Write NOP	(//ds8 write here a LOT ?????)
0x0090	1	Write	io_90_w (//ds9 sound command)
0x00A0	1	Write	io_a0_w (//ds10 irq1 clear)
0x00B0	1	Write	io_b0_w (//ds11 irq2 clear)
0x00C0	1	Write	io_c0_w (//ds12 irq3 clear)
0x00D0	1	Write	io_d0_w (//ds13 irq5 clear)
0x00E0	1	Write	io_e0_w (//ds14 irq4 clear)
0x00F0	1	Write	io_f0_w (//ds15 irq6 clear)

Memory Area:fastinvaders_map

Address Range	Length	Function	Description
0x0000-0x27FF	10240	ROM, Mirror	0x8000
0x2800-0x2FFF	2048	RAM, Mirror, Shared	0x8000, videoram
0x3000-0x33FF	1024	RAM, Mirror	0x8000

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
0x0000-0x01FF	512	C2.1F	CRC(9feca88a)
0x0200-0x03FF	512	C2.1G	CRC(79fc3963)
0x0400-0x05FF	512	C2.1H	CRC(936171e4)
0x0600-0x07FF	512	C2.2F	CRC(3bb16f55)
0x0800-0x09FF	512	C2.2G	CRC(19828c47)
0x0A00-0x0BFF	512	C2.2H	CRC(284ae4eb)

Memory Area:maincpu

Address Range	Length	Label/Location	Description
0x0000-0x01FF	512	R2.1A	CRC(6180d652)
0x0000-0x01FF	512	R2.1A	CRC(6180d652)
0x0200-0x03FF	512	R2.1B	CRC(f10baf3e)
0x0200-0x03FF	512	R2.1B	CRC(f10baf3e)
0x0400-0x05FF	512	R2.2A	CRC(f446ef0d)
0x0400-0x05FF	512	R2.2A	CRC(f446ef0d)
0x0600-0x07FF	512	R2.2B	CRC(b97e35a3)
0x0600-0x07FF	512	R2.2B	CRC(b97e35a3)
0x0800-0x09FF	512	R2.3A	CRC(988f36da)
0x0A00-0x0BFF	512	R2.3B	CRC(be7dc34d)
0x0C00-0x0DFF	512	R2.4A	CRC(199cb227)
0x0E00-0x0FFF	512	R2.4B	CRC(ca41218a)
0x1000-0x11FF	512	R2.5A	CRC(e8ecf0da)
0x1200-0x13FF	512	R2.5B	CRC(cb2d8029)
0x1400-0x15FF	512	R2.6A	CRC(e4d4cc96)
0x1600-0x17FF	512	R2.6B	CRC(0c96ba4a)
0x1800-0x19FF	512	R2.7A	CRC(c9207fbd)
0x2000-0x21FF	512	R2.1A	CRC(6180d652)
0x2000-0x21FF	512	R2.1A	CRC(6180d652)
0x2200-0x23FF	512	R2.1B	CRC(f10baf3e)
0x2200-0x23FF	512	R2.1B	CRC(f10baf3e)
0x2400-0x25FF	512	R2.2A	CRC(f446ef0d)
0x2400-0x25FF	512	R2.2A	CRC(f446ef0d)
0x2600-0x27FF	512	R2.2B	CRC(b97e35a3)
0x2600-0x27FF	512	R2.2B	CRC(b97e35a3)

Memory Area:prom

Address Range	Length	Label/Location	Description
0x0000-0x00FF	256	93427.bin	CRC(f59c8573)
0x0000-0x00FF	256	93427.bin	CRC(f59c8573)