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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.
Field Combat (Jaleco, 1985)
Memory Area:audio_map
Address RangeLengthFunctionDescription
0x0000-0x3FFF16384ROM
0x4000-0x47FF2048RAM
0x60001Device Readsoundlatch, generic_latch_8_device, read
0x80011Device Readay1, ay8910_device, data_r
0x8002-0x80032Device Writeay1, ay8910_device, data_address_w
0xA0011Device Readay2, ay8910_device, data_r
0xA002-0xA0032Device Writeay2, ay8910_device, data_address_w
0xC0011Device Readay3, ay8910_device, data_r
0xC002-0xC0032Device Writeay3, ay8910_device, data_address_w
Memory Area:main_map
Address RangeLengthFunctionDescription
0x0000-0x7FFF32768ROM
0xC000-0xC7FF2048RAM
0xD000-0xD7FF2048RAM, Sharedvideoram
0xD800-0xD8FF256RAM, Sharedspriteram
0xE0001Readfcombat_port01_r
0xE1001Read PortDSW0
0x00001Active High
0x00012Active High
0x00023Active High
0x00034Active High
0x00045Active High
0x0007Infinite (Cheat)Active High
0x000010000Active High
0x000820000Active High
0x001030000Active High
0x001840000Active High
0x0000OffActive High
0x0020OnActive High
0x0000OffActive High
0x0040OnActive High
0x0000UprightActive High
0x0080CocktailActive High
0xE2001Read PortDSW1
0x0001CustomActive High
0x0000OffActive High
0x0002OnActive High
0x00001C_1CActive High
0x00041C_2CActive High
0x00081C_3CActive High
0x000c1C_4CActive High
0x00f0UnusedActive Low
0xE3001Reade300_r
0xE4001Readfcombat_protection_r (// protection?)
0xE8001Writefcombat_videoreg_w (// at least bit 0 for flip screen and joystick input multiplexor)
0xE9001Writee900_w
0xEA001Writeea00_w
0xEB001Writeeb00_w
0xEC001Writeec00_w
0xED001Writeed00_w
0xEE001Writeee00_w (// related to protection ? - doesn't seem to have any effect)
0xEF001Device Writesoundlatch, generic_latch_8_device, write
 

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
0x0000-0x3FFF16384fcombat1.t5CRC(a0cc1216) (Fluke: AACD)
Memory Area:gfx1
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFF8192fcombat7.l11CRC(401061b5),fg chars (Fluke: 51FB)
Memory Area:gfx2
Address RangeLengthLabel/LocationDescription
0x0000-0x3FFF16384fcombat8.d10CRC(e810941e),sprites (Fluke: 557B)
0x4000-0x7FFF16384fcombat9.d11CRC(f95988e6) (Fluke: ABCA)
0x8000-0xBFFF16384fcomba10.d12CRC(908f154c) (Fluke: A37D)
Memory Area:gfx3
Address RangeLengthLabel/LocationDescription
0x0000-0x3FFF16384fcombat6.f3CRC(97282729) (Fluke: 2C98)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x0000-0x3FFF16384fcombat2.t9CRC(30cb0c14) (Fluke: D949)
0x4000-0x7FFF16384fcombat3.10tCRC(e8511da0) (Fluke: 4738)
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0000-0x001F32fcprom_a.c2CRC(7ac480f0),palette (Fluke: A125)
0x0020-0x011F256fcprom_d.k12CRC(9a348250),fg char lookup table (Fluke: AD97)
0x0120-0x021F256fcprom_b.c4CRC(ac9049f6),sprite lookup table (Fluke: 53AA)
0x0220-0x031F256fcprom_c.a9CRC(768ac120),bg char mixer (Fluke: 2086)
Memory Area:user1
Address RangeLengthLabel/LocationDescription
0x0000-0x3FFF16384fcombat5.l3CRC(96194ca7),bg data (Fluke: A046)
Memory Area:user2
Address RangeLengthLabel/LocationDescription
0x0000-0x3FFF16384fcombat4.p3CRC(efe098ab),terrain info (Fluke: 2F03)
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