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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.
Operation Thunderbolt (Taito America Corporation, 1988)
Memory Area:othunder_map
Address RangeLengthFunctionDescription
0x0000-0x7FFFF524288ROM
0x80000-0x8FFFF65536RAM
0x90000-0x9000F16Read/Writeothunder_tc0220ioc_r, othunder_tc0220ioc_w
0x100000-0x1000078Device Read/Writetc0110pcr, tc0110pcr_device, word_r, step1_rbswap_word_w (/* palette */)
0x200000-0x20FFFF65536Device Read/Writetc0100scn, tc0100scn_device, word_r, word_w (/* tilemaps */)
0x220000-0x22000F16Device Read/Writetc0100scn, tc0100scn_device, ctrl_word_r, ctrl_word_w
0x300000-0x3000034Read/Writeothunder_sound_r, othunder_sound_w
0x400000-0x4005FF1536RAM, Sharedspriteram
0x500000-0x5000078Read/Writeothunder_lightgun_r, othunder_lightgun_w
0x600000-0x6000034Writeirq_ack_w
Memory Area:z80_sound_map
Address RangeLengthFunctionDescription
0x0000-0x3FFF16384ROM
0x4000-0x7FFF16384ROM Bankz80bank
0xC000-0xDFFF8192RAM
0xE000-0xE0034Device Read/Writeymsnd, ym2610_device, read, write
0xE2001Read NOP, Device Writetc0140syt, tc0140syt_device, slave_port_w
0xE2011Device Read/Writetc0140syt, tc0140syt_device, slave_comm_r, slave_comm_w
0xE400-0xE4034Writeothunder_TC0310FAM_w (/* pan */)
0xE6001Write NOP(/* ? */)
0xEA001Read PortROTARY_PORT_TAG (/* rotary input */)
0xEE001Write NOP(/* ? */)
0xF0001Write NOP(/* ? */)
0xF2001Writesound_bankswitch_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
0x0000-0xFFFF65536b67-13.ic40CRC(2936b4b1) (Fluke: 9DC5)
0x0000-0xFFFF65536b67-13.ic40CRC(2936b4b1) (Fluke: 9DC5)
Memory Area:gfx1
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFFF524288b67-06.ic66CRC(b9a38d64),SCN (Fluke: D032)
0x0000-0x7FFFF524288b67-06.ic66CRC(b9a38d64),SCN (Fluke: D032)
Memory Area:plds
Address RangeLengthLabel/LocationDescription
0x0000-0x0148329plhs18p8b-b67-09.ic15CRC(62035487) (Fluke: 97AB)
0x0000-0x0148329plhs18p8b-b67-09.ic15CRC(62035487) (Fluke: 97AB)
0x0200-0x0303260pal16l8a-b67-11.ic36CRC(3177fb06) (Fluke: D357)
0x0200-0x0303260pal16l8a-b67-11.ic36CRC(3177fb06) (Fluke: D357)
0x0400-0x0543324pal20l8b-b67-12.ic37CRC(a47c2798) (Fluke: 4E9F)
0x0400-0x0543324pal20l8b-b67-12.ic37CRC(a47c2798) (Fluke: 4E9F)
0x0600-0x0743324pal20l8b-b67-10.ic33CRC(4ced09c7) (Fluke: 21FE)
0x0600-0x0743324pal20l8b-b67-10.ic33CRC(4ced09c7) (Fluke: 21FE)
Memory Area:ymsnd
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFFF524288b67-08.ic67CRC(458f41fb) (Fluke: B307)
0x0000-0x7FFFF524288b67-08.ic67CRC(458f41fb) (Fluke: B307)
Memory Area:ymsnd.deltat
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFFF524288b67-07.ic44CRC(4f834357) (Fluke: 9D86)
0x0000-0x7FFFF524288b67-07.ic44CRC(4f834357) (Fluke: 9D86)
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