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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.
The End (Konami, 1980)
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
0x0001UnknownActive Low
0x0002Button 2Active Low
0x0004Service 1Active Low
0x0008Button 1Active Low
0x0010Joystick RightActive Low
0x0020Joystick LeftActive Low
0x0040Coin 2Active Low
0x0080Coin 1Active Low
0x6000-0x60012Mirror, Write0x07f8, start_lamp_w
0x60021Mirror, Write0x07f8, coin_lock_w
0x60031Mirror, Write0x07f8, coin_count_0_w
0x68001Mirror, Read Port0x07ff, IN1
0x00003Active High
0x00014Active High
0x00025Active High
0x0003256 (Cheat)Active High
0x0004Button 2Active Low
0x0008Button 1Active Low
0x0010Joystick RightActive Low
0x0020Joystick LeftActive Low
0x0040Start 2Active Low
0x0080Start 1Active Low
0x70001Mirror, Read Port0x07ff, IN2
0x0001UnknownActive Low
0x00043C_1CActive High
0x00022C_1CActive High
0x00001C_1CActive High
0x00061C_2CActive High
0x0000UprightActive High
0x0008CocktailActive High
0x00f0UnusedActive Low
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:theend_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
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 Read0x07ff, watchdog, watchdog_timer_device, reset_r
0x8000-0xFFFF32768Read/Writetheend_ppi8255_r, theend_ppi8255_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
0x0000-0x07FF2048ic56_1.binCRC(7a141f29) (Fluke: FD65)
0x0800-0x0FFF2048ic55_2.binCRC(218497c1) (Fluke: 44E7)
Memory Area:gfx1
Address RangeLengthLabel/LocationDescription
0x0000-0x07FF2048ic30_2c.binCRC(68ccf7bf) (Fluke: B922)
0x0800-0x0FFF2048ic31_1c.binCRC(4a48c999) (Fluke: 66AC)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x0000-0x07FF2048ic13_1t.binCRC(93e555ba) (Fluke: BE0B)
0x0800-0x0FFF2048ic14_2t.binCRC(2de7ad27) (Fluke: 48E6)
0x1000-0x17FF2048ic15_3t.binCRC(035f750b) (Fluke: AA84)
0x1800-0x1FFF2048ic16_4t.binCRC(61286b5c) (Fluke: 3F39)
0x2000-0x27FF2048ic17_5t.binCRC(434a8f68) (Fluke: F1A5)
0x2800-0x2FFF2048ic18_6t.binCRC(dc4cc786) (Fluke: 018D)
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0000-0x001F326331-1j.86CRC(24652bc4) (Fluke: 494B)
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