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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.
S.R.D. Mission (Kyugo / Taito Corporation, 1986)
Memory Area:gyrodine_sub_map
Address RangeLengthFunctionDescription
0x0000-0x1FFF8192ROM
0x4000-0x47FF2048RAM, Sharedshared_ram
0x80001Read PortP2
0x80401Read PortP1
0x80801Read PortSYSTEM
Memory Area:gyrodine_sub_portmap
Address RangeLengthFunctionDescription
0x0000-0x00012Device Writeay1, ay8910_device, address_data_w
0x00021Device Readay1, ay8910_device, data_r
0x00C0-0x00C12Device Writeay2, ay8910_device, address_data_w
Memory Area:kyugo_main_map
Address RangeLengthFunctionDescription
0x0000-0x7FFF32768ROM
0x8000-0x87FF2048RAM Write, Sharedkyugo_bgvideoram_w, bgvideoram
0x8800-0x8FFF2048RAM Write, Sharedkyugo_bgattribram_w, bgattribram
0x9000-0x97FF2048RAM Write, Sharedkyugo_fgvideoram_w, fgvideoram
0x9800-0x9FFF2048RAM Read, Sharedkyugo_spriteram_2_r, spriteram_2
0xA000-0xA7FF2048RAM, Sharedspriteram_1
0xA8001Writekyugo_scroll_x_lo_w
0xB0001Writekyugo_gfxctrl_w
0xB8001Writekyugo_scroll_y_w
0xF000-0xF7FF2048RAM, Sharedshared_ram
Memory Area:kyugo_main_portmap
Address RangeLengthFunctionDescription
0x00001Writekyugo_nmi_mask_w
0x00011Writekyugo_flipscreen_w
0x00021Writekyugo_sub_cpu_control_w
Memory Area:srdmissn_sub_map
Address RangeLengthFunctionDescription
0x0000-0x7FFF32768ROM
0x8000-0x87FF2048RAM, Sharedshared_ram
0xF4001Read PortSYSTEM
0xF4011Read PortP1
0xF4021Read PortP2
Memory Area:srdmissn_sub_portmap
Address RangeLengthFunctionDescription
0x0080-0x00812Device Writeay1, ay8910_device, address_data_w
0x00821Device Readay1, ay8910_device, data_r
0x0084-0x00852Device Writeay2, ay8910_device, address_data_w
0x0090-0x00912Writekyugo_coin_counter_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:gfx1
Address RangeLengthLabel/LocationDescription
0x0000-0x0FFF409615.4aCRC(4961f7fd),chars (Fluke: C8E2)
Memory Area:gfx2
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFF819217.9hCRC(41211458),tiles - plane 1 (Fluke: D130)
0x2000-0x3FFF819218.10hCRC(740eccd4),tiles - plane 0 (Fluke: E552)
0x4000-0x5FFF819216.11hCRC(c1f4a5db),tiles - plane 2 (Fluke: A069)
Memory Area:gfx3
Address RangeLengthLabel/LocationDescription
0x0000-0x3FFF1638414.6aCRC(3d4c0447),sprites - plane 0 (Fluke: A146)
0x4000-0x7FFF1638413.7aCRC(22414a67),sprites - plane 0 (Fluke: 66E8)
0x8000-0xBFFF1638412.8aCRC(61e34283),sprites - plane 1 (Fluke: B4C3)
0xC000-0xFFFF1638411.9aCRC(bbbaffef),sprites - plane 1 (Fluke: C275)
0x10000-0x13FFF1638410.10aCRC(de564f97),sprites - plane 2 (Fluke: DF04)
0x14000-0x17FFF163849.11aCRC(890dc815),sprites - plane 2 (Fluke: D48C)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x0000-0x3FFF163845.t2CRC(a682b48c) (Fluke: 892B)
0x4000-0x7FFF163847.t3CRC(1719c58c) (Fluke: 8D22)
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0000-0x00FF256mr.1jCRC(110a436e),red (Fluke: 4B59)
0x0100-0x01FF256mg.1hCRC(0fbfd9f0),green (Fluke: 44BE)
0x0200-0x02FF256mb.1fCRC(a342890c),blue (Fluke: 206A)
0x0300-0x031F32m2.5jCRC(190a55ad),char lookup table (Fluke: 0)
0x0320-0x033F32m1.2cCRC(83a39201),timing? not used (Fluke: CA70)
Memory Area:sub
Address RangeLengthLabel/LocationDescription
0x0000-0x3FFF163841.t7CRC(dc48595e) (Fluke: 69AE)
0x4000-0x7FFF163843.t8CRC(216be1e8) (Fluke: 461F)
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