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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.
Radical Radial (Nichibutsu USA, 1982)
Memory Area:main_map
Address RangeLengthFunctionDescription
0x0000-0x77FF30720ROM
0x7800-0x7FFF2048RAM, Sharedshare1
0x8820-0x887F96RAM, Sharedspriteram
0x9000-0x93FF1024RAM Write, Sharedvideoram_w, videoram (/* video RAM */)
0x9800-0x981F32RAM, Sharedrow_scroll
0x9880-0x989F32Write Only, Sharedspriteram2
0x9C00-0x9FFF1024RAM Write, Sharedcolorram_w, colorram
0xA0001Read PortIN0 (/* IN0 */)
0x0001Joystick UpActive High
0x0002Joystick DownActive High
0x0004Joystick LeftActive High
0x0008Joystick RightActive High
0x0010Coin 1Active High
0x0020Coin 2Active High
0x0040Start 1Active High
0x0080Start 2Active High
0xA8001Read PortIN1 (/* IN1 */)
0x0001Joystick UpActive High
0x0002Joystick DownActive High
0x0004Joystick LeftActive High
0x0008Joystick RightActive High
0x0010Service 1Active High
0x0020Button 1Active High
0x0040Button 2Active High
0x0080UnknownActive High
0xB0001Read PortTEST (/* test */)
0x0001Button 1Active High
0x0002Button 2Active High
0x00fcUnknownActive High
0xB8001Device Readwatchdog, watchdog_timer_device, reset_r
Memory Area:main_portmap
Address RangeLengthFunctionDescription
0x0000-0x00012Mirror, Device Write0x08, aysnd, ay8910_device, address_data_w
0x00041Mirror, Device Read0x08, aysnd, ay8910_device, data_r
Memory Area:mcu_no_nvram_map
Address RangeLengthFunctionDescription
0x0000-0x007F128RAM
0x10031Read PortDSW1 (/* DSW1 */)
0x0001UprightActive High
0x0000CocktailActive High
0x00002Active High
0x00023Active High
0x00044Active High
0x00065Active High
0x0008OffActive High
0x0000OnActive High
0x00f0UnusedActive High
0x10051Read PortDSW2 (/* DSW2 */)
0x00077C_1CActive High
0x00066C_1CActive High
0x00055C_1CActive High
0x00044C_1CActive High
0x000f7 Coins/2 CreditsActive High
0x000e6 Coins/2 CreditsActive High
0x00033C_1CActive High
0x000d5 Coins/2 CreditsActive High
0x000c4C_2CActive High
0x00022C_1CActive High
0x000b3C_2CActive High
0x000a2C_2CActive High
0x00011C_1CActive High
0x00091C_2CActive High
0x0000Free_PlayActive High
0x00f0UnusedActive High
0x10061Read PortDSW3 (/* DSW3 */)
0x00082C_1CActive High
0x00092C_2CActive High
0x00001C_1CActive High
0x000a2C_3CActive High
0x000b2C_4CActive High
0x00011C_2CActive High
0x000c2C_5CActive High
0x000d2C_6CActive High
0x00021C_3CActive High
0x000e2C_7CActive High
0x000f2C_8CActive High
0x00031C_4CActive High
0x00041C_5CActive High
0x00051C_6CActive High
0x00061C_7CActive High
0x00071C_8CActive High
0x00f0UnusedActive High
0x20001Writedac_w
0x8000-0xF7FF30720ROM, Regionmaincpu, 0
0xF800-0xFFFF2048RAM, Sharedshare1
 

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
0x0000-0x0FFF409611.l7CRC(4ace7afb) (Fluke: 0500)
0x1000-0x1FFF409612.n7CRC(b19b8473) (Fluke: 93AC)
0x2000-0x2FFF40969.j7CRC(229939a3) (Fluke: 7650)
0x3000-0x3FFF409610.j7CRC(79237913) (Fluke: 101C)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x0000-0x0FFF40961.3aCRC(b1e958ca) (Fluke: C486)
0x1000-0x1FFF40962.3bCRC(30ba76b3) (Fluke: 8BD7)
0x2000-0x2FFF40963.3cCRC(1c9f397b) (Fluke: 7257)
0x3000-0x3FFF40964.3dCRC(453966a3) (Fluke: 8A46)
0x4000-0x4FFF40965.3eCRC(c337c4bd) (Fluke: 6026)
0x5000-0x5FFF40966.3fCRC(06e15b59) (Fluke: 337C)
0x6000-0x6FFF40967.3gCRC(02b1f9c9) (Fluke: C01B)
0x7000-0x77FF20488.3hCRC(911c90e8) (Fluke: B489)
Memory Area:plds
Address RangeLengthLabel/LocationDescription
0x0000-0x004368pal16h2.2bCRC(a356803a) (Fluke: A813)
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0000-0x001F32clr.9cCRC(c9d88422) (Fluke: 2786)
0x0020-0x003F32clr.9bCRC(ee81af16) (Fluke: 918F)
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