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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.
Destroyer (Atari, 1977)
Memory Area:destroyr_map
Address RangeLengthFunctionDescription
0x0000-0x00FF256Mirror, RAM0xf00,
0x1000-0x1FFF4096Read/Writeinput_r, output_w
0x2000-0x2FFF4096Read PortIN2
0x0003CoinageActive High
0x00032C_1CActive High
0x00021C_1CActive High
0x00011C_2CActive High
0x0000Free_PlayActive High
0x000050 secondsActive High
0x000475 secondsActive High
0x0008100 secondsActive High
0x000c125 secondsActive High
0x0030LanguageActive High
0x0030GermanActive High
0x0020FrenchActive High
0x0010SpanishActive High
0x0000EnglishActive High
0x0040UnusedActive Low
0x0080UnusedActive Low
0x3000-0x30FF256Mirror, Write Only, Shared0xf00, , alpha_nuram
0x4000-0x401F32Mirror, Write Only, Shared0xfe0, , major_obj_ram
0x50001Mirror, Write0xff8, cursor_load_w
0x50011Mirror, Write0xff8, interrupt_ack_w
0x5002-0x50076Mirror, Write Only, Shared0xff8, , minor_obj_ram
0x6000-0x6FFF4096Readscanline_r
0x7000-0x7FFF4096ROM
 

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 RangeLengthLabel/LocationDescription
0x0000-0x03FF1024030135-01.p4CRC(184824cf) (Fluke: DD07)
0x0000-0x03FF1024030135-01.p4CRC(184824cf) (Fluke: DD07)
Memory Area:gfx2
Address RangeLengthLabel/LocationDescription
0x0000-0x03FF1024030132-01.f4CRC(e09d3d55) (Fluke: F048)
0x0000-0x03FF1024030132-01.f4CRC(e09d3d55) (Fluke: F048)
0x0400-0x07FF1024030132-01.k4CRC(e09d3d55) (Fluke: F048)
0x0400-0x07FF1024030132-01.k4CRC(e09d3d55) (Fluke: F048)
Memory Area:gfx4
Address RangeLengthLabel/LocationDescription
0x0000-0x00FF256030131-01.m1CRC(b8094b4c) (Fluke: 695B)
0x0000-0x001F32030136-01.k2CRC(532c11b1) (Fluke: 4242)
0x0000-0x001F32030136-01.k2CRC(532c11b1) (Fluke: 4242)
0x0000-0x00FF256030131-01.m1CRC(b8094b4c) (Fluke: 695B)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x7000-0x77FF2048030138.rom
0x7000-0x77FF2048030138.rom
0x7800-0x7FFF2048030146-01.c3CRC(e560c712) (Fluke: E29C)
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