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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.
Take Off (bootleg (Sidam), 1980)
Memory Area:explorer_map
Address RangeLengthFunctionDescription
0x0000-0x3FFF16384ROM
0x4000-0x47FF2048RAM
0x4800-0x4BFF1024Mirror, RAM Write, Shared0x0400, galaxian_videoram_w, videoram
0x5000-0x50FF256Mirror, RAM Write, Shared0x0700, galaxian_objram_w, spriteram
0x68001Write NOP(// ????)
0x68011Mirror, Write0x07f8, irq_enable_w
0x68021Mirror, Write0x07f8, coin_count_0_w
0x68031Mirror, Write0x07f8, scramble_background_enable_w
0x68041Mirror, Write0x07f8, galaxian_stars_enable_w
0x68051Mirror0x07f8 (//POUT2)
0x68061Mirror, Write0x07f8, galaxian_flip_screen_x_w
0x68071Mirror, Write0x07f8, galaxian_flip_screen_y_w
0x70001Mirror, Device Read/Write0x07ff, watchdog, watchdog_timer_device, reset_r, reset_w (/* watchdog works for writes as well? (or is it just disabled?) */)
0x80001Mirror, Read Port0x0ffc, IN0
0x80001Mirror, Device Write0x0fff, soundlatch, generic_latch_8_device, write
0x80011Mirror, Read Port0x0ffc, IN1
0x80021Mirror, Read Port0x0ffc, IN2
0x80031Mirror, Read Port0x0ffc, IN3
0x90001Mirror, Write0x0fff, explorer_sound_control_w
Memory Area:galaxian_map_base
Address RangeLengthFunctionDescription
0x0000-0x3FFF16384ROM
0x4000-0x43FF1024Mirror, RAM0x0400,
0x5000-0x53FF1024Mirror, RAM Write, Shared0x0400, galaxian_videoram_w, videoram
0x5800-0x58FF256Mirror, RAM Write, Shared0x0700, galaxian_objram_w, spriteram
0x60001Mirror, Read Port0x07ff, IN0
0x6000-0x60012Mirror, Write0x07f8, start_lamp_w
0x60021Mirror, Write0x07f8, coin_lock_w
0x60031Mirror, Write0x07f8, coin_count_0_w
0x68001Mirror, Read Port0x07ff, IN1
0x70001Mirror, Read Port0x07ff, IN2
0x70011Mirror, Write0x07f8, irq_enable_w
0x70041Mirror, Write0x07f8, galaxian_stars_enable_w
0x70061Mirror, Write0x07f8, galaxian_flip_screen_x_w
0x70071Mirror, Write0x07f8, galaxian_flip_screen_y_w
0x78001Mirror, Device Read0x07ff, watchdog, watchdog_timer_device, reset_r
Memory Area:konami_sound_map
Address RangeLengthFunctionDescription
0x0000-0x2FFF12288ROM
0x8000-0x83FF1024Mirror, RAM0x6c00,
0x9000-0x9FFF4096Mirror, Write0x6000, konami_sound_filter_w
Memory Area:konami_sound_portmap
Address RangeLengthFunctionDescription
0x0000-0x00FF256Read/Writekonami_ay8910_r, konami_ay8910_w
Memory Area:takeoff_sound_map
Address RangeLengthFunctionDescription
0x0000-0x0FFF4096ROM
0x8000-0x83FF1024Mirror, RAM0x6c00,
Memory Area:takeoff_sound_portmap
Address RangeLengthFunctionDescription
0x00201Readkonami_sound_timer_r
0x00401Device Write8912, ay8912_device, address_w
0x00801Device Read/Write8912, ay8912_device, data_r, data_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:audiocpu
Address RangeLengthLabel/LocationDescription
0x0000-0x0FFF40960s.t.o.3bCRC(cdc9da78)
Memory Area:gfx1
Address RangeLengthLabel/LocationDescription
0x0000-0x07FF2048ic30CRC(527fd384) (Fluke: D253)
0x0800-0x0FFF2048ic31CRC(af6d09b6) (Fluke: 6C4B)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x0000-0x0FFF40960p.t.o.10lCRC(46712d43)
0x1000-0x1FFF40961p.t.o.9lCRC(10256742)
0x2000-0x2FFF40962p.t.o.8lCRC(5ee6660a)
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0000-0x001F326331-1j.86CRC(24652bc4) (Fluke: 494B)
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