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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.
Strategy X (Konami (Stern Electronics license), 1981)
Memory Area:scobra_sound_io_map
Address RangeLengthFunctionDescription
0x00101Device Writeay1, ay8910_device, address_w
0x00201Device Read/Writeay1, ay8910_device, data_r, data_w
0x00401Device Writeay2, ay8910_device, address_w
0x00801Device Read/Writeay2, ay8910_device, data_r, data_w
Memory Area:scobra_sound_map
Address RangeLengthFunctionDescription
0x0000-0x2FFF12288ROM
0x8000-0x8FFF4096Read/Writescobra_soundram_r, scobra_soundram_w
0x8000-0x83FF1024Write NOP, Sharedsoundram (/* only here to initialize pointer */)
0x9000-0x9FFF4096Writescramble_filter_w
Memory Area:type1_map
Address RangeLengthFunctionDescription
0x0000-0x7FFF32768ROM
0x8000-0x87FF2048RAM
0x8800-0x8BFF1024RAM Write, Sharedgalaxold_videoram_w, videoram
0x8C00-0x8FFF1024RAM Writegalaxold_videoram_w (/* mirror */)
0x8C00-0x8FFF1024Readgalaxold_videoram_r (/* mirror */)
0x9000-0x903F64RAM Write, Sharedgalaxold_attributesram_w, attributesram
0x9040-0x905F32RAM, Sharedspriteram
0x9060-0x907F32RAM, Sharedbulletsram
0x9080-0x90FF128RAM
0x9800-0x98034Device Read/Writeppi8255_0, i8255_device, read, write
0xA000-0xA0034Device Read/Writeppi8255_1, i8255_device, read, write
0xA8011Writegalaxold_nmi_enable_w
0xA8021Writegalaxold_coin_counter_w
0xA8041Writegalaxold_stars_enable_w
0xA8061Writegalaxold_flip_screen_x_w
0xA8071Writegalaxold_flip_screen_y_w
0xB0001Device Readwatchdog, watchdog_timer_device, reset_r
Memory Area:type2_map
Address RangeLengthFunctionDescription
0x0000-0x7FFF32768ROM
0x8000-0x87FF2048RAM
0x8800-0x883F64RAM Write, Sharedgalaxold_attributesram_w, attributesram
0x8840-0x885F32RAM, Sharedspriteram
0x8860-0x887F32RAM, Sharedbulletsram
0x8880-0x88FF128RAM
0x9000-0x93FF1024RAM Write, Sharedgalaxold_videoram_w, videoram
0x9400-0x97FF1024Read/Writegalaxold_videoram_r, galaxold_videoram_w (/* mirror */)
0x98001Device Readwatchdog, watchdog_timer_device, reset_r
0xA000-0xA00F16Read/Writescobra_type2_ppi8255_0_r, scobra_type2_ppi8255_0_w
0xA800-0xA80F16Read/Writescobra_type2_ppi8255_1_r, scobra_type2_ppi8255_1_w
0xB0001Writegalaxold_stars_enable_w
0xB0041Writegalaxold_nmi_enable_w
0xB0061Writegalaxold_coin_counter_0_w
0xB0081Writegalaxold_coin_counter_1_w
0xB00C1Writegalaxold_flip_screen_y_w
0xB00E1Writegalaxold_flip_screen_x_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
0x0000-0x0FFF4096s1.binCRC(713a5db8) (Fluke: B0AC)
0x1000-0x1FFF4096s2.binCRC(46079411) (Fluke: DB7D)
Memory Area:gfx1
Address RangeLengthLabel/LocationDescription
0x0000-0x07FF20485f.cpuCRC(f4aa5ddd) (Fluke: 2218)
0x0800-0x0FFF20485h.cpuCRC(548e4635) (Fluke: B62D)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x0000-0x0FFF40962c.cpuCRC(f2aaaf2b) (Fluke: E391)
0x1000-0x1FFF40962e.cpuCRC(5873fdc8) (Fluke: 56E5)
0x2000-0x2FFF40962f.cpuCRC(532d604f) (Fluke: 6F50)
0x3000-0x3FFF40962h.cpuCRC(82b1d95e) (Fluke: 108C)
0x4000-0x4FFF40962j.cpuCRC(66e84cde) (Fluke: 5122)
0x5000-0x5FFF40962l.cpuCRC(62b032d0) (Fluke: 72EF)
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0000-0x001F32strategy.6eCRC(51a629e1) (Fluke: F6D8)
Memory Area:user1
Address RangeLengthLabel/LocationDescription
0x0000-0x001F32strategy.10kCRC(d95c0318) (Fluke: 5975)
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