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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.
Rock Climber (Taito, 1981)
Memory Area:galaxold_map
Address RangeLengthFunctionDescription
0x0000-0x3FFF16384ROM
0x4000-0x47FF2048RAM
0x5000-0x53FF1024RAM Write, Sharedgalaxold_videoram_w, videoram
0x5400-0x57FF1024Readgalaxold_videoram_r
0x5800-0x583F64RAM Write, Sharedgalaxold_attributesram_w, attributesram
0x5840-0x585F32RAM, Sharedspriteram
0x5860-0x587F32RAM, Sharedbulletsram
0x5880-0x58FF128RAM
0x60001Read PortIN0
0x0001Coin 2Active High
0x0002Service 1Active High
0x0004Joystickright LeftActive High
0x0008Joystickright RightActive High
0x0010Joystickright UpActive High
0x0020Joystickright DownActive High
0x0000UprightActive High
0x0040CocktailActive High
0x0080Coin 1Active High
0x6000-0x60012Writegalaxold_leds_w
0x60021Writegalaxold_coin_lockout_w
0x60031Writegalaxold_coin_counter_w
0x6004-0x60074Device Writecust, galaxian_sound_device, lfo_freq_w
0x6800-0x68023Device Writecust, galaxian_sound_device, background_enable_w
0x68001Read PortIN1
0x0001Start 1Active High
0x0002Start 2Active High
0x0004Joystickleft LeftActive High
0x0008Joystickleft RightActive High
0x0010Joystickleft UpActive High
0x0020Joystickleft DownActive High
0x000030000Active High
0x004050000Active High
0x00801Active High
0x00002Active High
0x68031Device Writecust, galaxian_sound_device, noise_enable_w
0x68051Device Writecust, galaxian_sound_device, fire_enable_w
0x6806-0x68072Device Writecust, galaxian_sound_device, vol_w
0x70001Read PortIN2
0x0001Joystickright LeftActive High
0x0002Joystickright RightActive High
0x0004Joystickright UpActive High
0x0008Joystickright DownActive High
0x0010Joystickleft LeftActive High
0x0020Joystickleft RightActive High
0x0040Joystickleft UpActive High
0x0080Joystickleft DownActive High
0x70011Writegalaxold_nmi_enable_w
0x70041Writegalaxold_stars_enable_w
0x70061Writegalaxold_flip_screen_x_w
0x70071Writegalaxold_flip_screen_y_w
0x78001Device Writecust, galaxian_sound_device, pitch_w
0x7800-0x7FFF2048Device Readwatchdog, watchdog_timer_device, reset_r
0xFFFC-0xFFFF4RAM
Memory Area:rockclim_map
Address RangeLengthFunctionDescription
0x0000-0x3FFF16384ROM
0x4000-0x47FF2048Read/Write, Sharedrockclim_videoram_r, rockclim_videoram_w, rockclim_vram (//4800 - 4803 = bg scroll ?)
0x4800-0x48034Writerockclim_scroll_w
0x5000-0x53FF1024RAM(//?)
0x58001Read PortIN2
0x0001Joystickright LeftActive High
0x0002Joystickright RightActive High
0x0004Joystickright UpActive High
0x0008Joystickright DownActive High
0x0010Joystickleft LeftActive High
0x0020Joystickleft RightActive High
0x0040Joystickleft UpActive High
0x0080Joystickleft DownActive High
0x6000-0x7FFF8192ROM
0x8000-0x87FF2048RAM
0x88001Read PortDSW1
0x00009C_1CActive High
0x00018C_1CActive High
0x00027C_1CActive High
0x00036C_1CActive High
0x00045C_1CActive High
0x00054C_1CActive High
0x00063C_1CActive High
0x00072C_1CActive High
0x000f1C_1CActive High
0x000e1C_2CActive High
0x000d1C_3CActive High
0x000c1C_4CActive High
0x000b1C_5CActive High
0x000a1C_6CActive High
0x00091C_7CActive High
0x00081C_8CActive High
0x00009C_1CActive High
0x00108C_1CActive High
0x00207C_1CActive High
0x00306C_1CActive High
0x00405C_1CActive High
0x00504C_1CActive High
0x00603C_1CActive High
0x00702C_1CActive High
0x00f01C_1CActive High
0x00e01C_2CActive High
0x00d01C_3CActive High
0x00c01C_4CActive High
0x00b01C_5CActive High
0x00a01C_6CActive High
0x00901C_7CActive High
0x00801C_8CActive High
0x9000-0x93FF1024RAM Write, Sharedgalaxold_videoram_w, videoram
0x9400-0x97FF1024Readgalaxold_videoram_r
0x9800-0x983F64RAM Write, Sharedgalaxold_attributesram_w, attributesram
0x9840-0x985F32RAM, Sharedspriteram
0x9860-0x987F32RAM, Sharedbulletsram
0x9880-0x98FF128RAM
0xA0001Read PortIN0
0x0001Coin 2Active High
0x0002Service 1Active High
0x0004Joystickright LeftActive High
0x0008Joystickright RightActive High
0x0010Joystickright UpActive High
0x0020Joystickright DownActive High
0x0000UprightActive High
0x0040CocktailActive High
0x0080Coin 1Active High
0xA000-0xA0023Writegalaxold_gfxbank_w (// a002 - sprite bank)
0xA0031Writegalaxold_coin_counter_w
0xA004-0xA0074Device Writecust, galaxian_sound_device, lfo_freq_w
0xA8001Read PortIN1
0x0001Start 1Active High
0x0002Start 2Active High
0x0004Joystickleft LeftActive High
0x0008Joystickleft RightActive High
0x0010Joystickleft UpActive High
0x0020Joystickleft DownActive High
0x000030000Active High
0x004050000Active High
0x00801Active High
0x00002Active High
0xA800-0xA8023Device Writecust, galaxian_sound_device, background_enable_w
0xA8031Device Writecust, galaxian_sound_device, noise_enable_w
0xA8051Device Writecust, galaxian_sound_device, fire_enable_w
0xA806-0xA8072Device Writecust, galaxian_sound_device, vol_w
0xB0001Read Port, WriteDSW0, galaxold_nmi_enable_w
0x00003Active High
0x00014Active High
0x00025Active High
0x00036Active High
0x0004UnusedActive High
0x0008TiltActive High
0x00f0UnusedActive High
0xB0061Writegalaxold_flip_screen_x_w
0xB0071Writegalaxold_flip_screen_y_w
0xB8001Device Writecust, galaxian_sound_device, pitch_w
0xB8001Device Readwatchdog, watchdog_timer_device, reset_r
 

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
0x0000-0x07FF2048lc08.a9CRC(7f18e1ef) (Fluke: FF36)
0x0800-0x0FFF2048lc07.a7CRC(f18b50ac) (Fluke: 6772)
0x1000-0x17FF2048lc10.c9CRC(dec5781b) (Fluke: 903E)
0x1800-0x1FFF2048lc09.c7CRC(06c0b5de) (Fluke: E037)
Memory Area:gfx2
Address RangeLengthLabel/LocationDescription
0x0000-0x0FFF4096lc13.g5CRC(19475f2b) (Fluke: 4DAB)
0x1000-0x1FFF4096lc14.g7CRC(cc96d1db) (Fluke: 4056)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x0000-0x0FFF4096lc01.a1CRC(8601ae8d) (Fluke: DC3E)
0x1000-0x1FFF4096lc02.a2CRC(2dde9d4c) (Fluke: BF0F)
0x2000-0x2FFF4096lc03.a3CRC(82c48a67) (Fluke: 04F9)
0x3000-0x3FFF4096lc04.a4CRC(7cd3a04a) (Fluke: 4584)
0x6000-0x6FFF4096lc05.a5CRC(5e542149) (Fluke: 4771)
0x7000-0x7FFF4096lc06.a6CRC(b2bdca64) (Fluke: 2156)
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0000-0x001F32lc12.e9CRC(f6e76547) (Fluke: 0B6C)
0x0020-0x003F32lc11.f4CRC(6a0c7d87) (Fluke: 9DB9)
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