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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.
Firebeast (Atari, 1983)
Memory Area:cloud9_map
Address RangeLengthFunctionDescription
0x0000-0x00012Writecloud9_bitmode_addr_w
0x0000-0x4FFF20480ROM Bank, Writebank1, cloud9_videoram_w
0x00021Read/Writecloud9_bitmode_r, cloud9_bitmode_w
0x5000-0x53FF1024RAM, Sharedspriteram
0x5400-0x547F128Device Writewatchdog, watchdog_timer_device, reset_w
0x5480-0x54FF128Writeirq_ack_w
0x5500-0x557F128RAM Write, Sharedcloud9_paletteram_w, paletteram
0x5580-0x55878Mirror, Write0x0078, cloud9_video_control_w
0x5600-0x56012Mirror, Write0x0078, cloud9_coin_counter_w
0x5602-0x56032Mirror, Write0x0078, cloud9_led_w
0x5680-0x56FF128Writenvram_store_w
0x5700-0x577F128Writenvram_recall_w
0x58001Mirror, Read Port0x007e, IN0
0x0007UnknownActive Low
0x0010Service 1Active Low
0x0020Coin 1Active Low
0x0040Coin 2Active Low
0x0080SpecialActive Low
0x58011Mirror, Read Port0x007e, IN1
0x0007UnknownActive Low
0x0008Button 2Active Low
0x0010UnknownActive Low
0x0020Button 1Active Low
0x0040Start 2Active Low
0x0080Start 1Active Low
0x5900-0x59034Mirror, Read0x007c, leta_r
0x5A00-0x5A0F16Mirror, Device Read/Write0x00f0, pokey1, pokey_device, read, write
0x5B00-0x5B0F16Mirror, Device Read/Write0x00f0, pokey2, pokey_device, read, write
0x5C00-0x5CFF256Mirror, Device Read/Write0x0300, nvram, x2212_device, read, write
0x6000-0xFFFF40960ROM
 

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
0x0000-0x1FFF8192mo0000.r12CRC(5246c979) (Fluke: 75ED)
0x2000-0x3FFF8192mo2000.p12CRC(1a3b6d57) (Fluke: 19BC)
0x4000-0x5FFF8192mo4000.n12CRC(69e18319) (Fluke: CD77)
0x6000-0x7FFF8192mo6000.m12CRC(b722997f) (Fluke: B279)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x6000-0x7FFF81926000.j2CRC(dbd04782) (Fluke: DAD1)
0x8000-0x9FFF81928000.kl2CRC(96231ca4) (Fluke: A456)
0xA000-0xBFFF8192a000.lm2CRC(f7e0bf25) (Fluke: 62D4)
0xC000-0xDFFF8192c000.n2CRC(43a91b74) (Fluke: 5D68)
0xE000-0xEFFF4096e000.p2CRC(8e5045ab) (Fluke: ED9E)
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0000-0x00FF25663s141.e10CRC(8e98083f),Sync PROM (Fluke: A513)
0x0100-0x01FF25663s141.m10CRC(b0b039c0),??? PROM (Fluke: 0753)
0x0200-0x02FF25682s129.p3CRC(615d784d),VRAM Write Protect PROM (Fluke: 2CEC)
0x0300-0x03FF25663s141.m8CRC(6d7479ec),??? PROM (Fluke: 5735)
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