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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.
Roller Jammer (Nichibutsu / Alice, 1984)
Memory Area:nsc_map
Address RangeLengthFunctionDescription
0x0000-0x03FF1024RAM, Sharedsprite_color
0x0800-0x0FFF2048RAM, Sharedshare2
0x2000-0x200910Writetubep_sprite_control_w
0x200A-0x200B2Write NOP(/* not used by the games - perhaps designed for debugging */)
0xC000-0xFFFF16384ROM
Memory Area:rjammer_main_map
Address RangeLengthFunctionDescription
0x0000-0x9FFF40960ROM
0xA000-0xA7FF2048RAM(/* MB8416 SRAM on daughterboard on main PCB (there are two SRAMs, this is the one on the left) */)
0xC000-0xC7FF2048Write, Sharedtubep_textram_w, textram (/* RAM on GFX PCB @B13 */)
0xE000-0xE7FF2048RAM, Sharedshare1 (/* MB8416 SRAM on daughterboard (the one on the right) */)
Memory Area:rjammer_main_portmap
Address RangeLengthFunctionDescription
0x00001Read PortDSW2 (/* a bug in game code (during attract mode) */)
0x0001Demo_SoundsActive High
0x0001OffActive High
0x0000OnActive High
0x0002100Active High
0x0000200Active High
0x000c20Active High
0x000830Active High
0x000440Active High
0x000050Active High
0x0010DifficultyActive High
0x0010EasyActive High
0x0000HardActive High
0x002040Active High
0x000050Active High
0x0040UnusedActive Low
0x0080UnusedActive Low
0x00801Read PortDSW2
0x0001Demo_SoundsActive High
0x0001OffActive High
0x0000OnActive High
0x0002100Active High
0x0000200Active High
0x000c20Active High
0x000830Active High
0x000440Active High
0x000050Active High
0x0010DifficultyActive High
0x0010EasyActive High
0x0000HardActive High
0x002040Active High
0x000050Active High
0x0040UnusedActive Low
0x0080UnusedActive Low
0x00901Read PortDSW1
0x0001CabinetActive High
0x0000UprightActive High
0x0001CocktailActive High
0x0002UnusedActive High
0x0002OffActive High
0x0000OnActive High
0x000cCoin_BActive High
0x00003C_1CActive High
0x00042C_3CActive High
0x000c1C_3CActive High
0x00081C_6CActive High
0x0030Coin_AActive High
0x00102C_1CActive High
0x00301C_1CActive High
0x00201C_2CActive High
0x0000Free_PlayActive High
0x0040UnusedActive Low
0x0080UnusedActive Low
0x00A01Read PortSYSTEM
0x0001Coin 1Active Low
0x0002Coin 2Active Low
0x0004Service 1Active Low
0x0010UnknownActive Low
0x0020UnknownActive Low
0x0040UnusedActive Low
0x0080UnusedActive Low
0x00B01Read PortP1
0x0001Button 2Active Low
0x0002Button 1Active Low
0x0004Joystick UpActive Low
0x0008Joystick DownActive Low
0x0010Joystick LeftActive Low
0x0020Joystick RightActive Low
0x0040Start 1Active Low
0x0080Button 3Active Low
0x00C01Read PortP2
0x0001Button 2Active Low
0x0002Button 1Active Low
0x0004Joystick UpActive Low
0x0008Joystick DownActive Low
0x0010Joystick LeftActive Low
0x0020Joystick RightActive Low
0x0040Start 2Active Low
0x0080Button 3Active Low
0x00D0-0x00D78Writerjammer_LS259_w
0x00E01Writemain_cpu_irq_line_clear_w (/* clear IRQ interrupt */)
0x00F01Writerjammer_soundlatch_w
Memory Area:rjammer_second_map
Address RangeLengthFunctionDescription
0x0000-0x7FFF32768ROM
0xA000-0xA7FF2048RAM(/* M5M5117P @21G */)
0xE000-0xE7FF2048RAM, Sharedshare1 (/* MB8416 on daughterboard (the one on the right) */)
0xE800-0xEFFF2048RAM, Sharedrjammer_bgram (/* M5M5117P @19B (background) */)
0xF800-0xFFFF2048RAM, Sharedshare2
Memory Area:rjammer_second_portmap
Address RangeLengthFunctionDescription
0x00B01Writerjammer_background_page_w
0x00D01Writerjammer_background_LS377_w
Memory Area:rjammer_sound_map
Address RangeLengthFunctionDescription
0x0000-0x7FFF32768ROM
0xE000-0xE7FF2048RAM(/* M5M5117P (M58125P @2C on schematics) */)
Memory Area:rjammer_sound_portmap
Address RangeLengthFunctionDescription
0x00001Readrjammer_soundlatch_r
0x00101Writerjammer_voice_startstop_w
0x00181Writerjammer_voice_frequency_select_w
0x00801Writerjammer_voice_input_w
0x0090-0x00912Device Writeay1, ay8910_device, address_data_w
0x0092-0x00932Device Writeay2, ay8910_device, address_data_w
0x0094-0x00952Device Writeay3, ay8910_device, address_data_w
0x00961Writerjammer_voice_intensity_control_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
0x0000-0x0FFF4096tp-g4.c10CRC(99e72549),text characters (Fluke: 3A33)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFF8192tp-p.1CRC(93eeed67) (Fluke: 677B)
0x2000-0x3FFF8192tp-p.2CRC(ed2830c4) (Fluke: D215)
0x4000-0x5FFF8192tp-p.3CRC(e29f25e3) (Fluke: ADFA)
0x8000-0x9FFF8192tp-p.4CRC(6ed71fbc) (Fluke: 70CC)
Memory Area:mcu
Address RangeLengthLabel/LocationDescription
0xC000-0xDFFF8192tp-g7.e1CRC(9f375b27) (Fluke: 0541)
0xE000-0xFFFF8192tp-g8.d1CRC(2e619fec) (Fluke: 6D46)
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0020-0x003F3216aCRC(90222a71),background palette (Fluke: 9E87)
Memory Area:slave
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFF8192tp-p.8CRC(388b9c66) (Fluke: E822)
0x2000-0x3FFF8192tp-p.7CRC(595030bb) (Fluke: 38B4)
0x4000-0x5FFF8192tp-p.6CRC(b5aa0f89) (Fluke: BE9B)
0x6000-0x7FFF8192tp-p.5CRC(56eae9ac) (Fluke: 8BFC)
Memory Area:soundcpu
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFF8192tp-b1.6dCRC(b1c2525c) (Fluke: A126)
0x2000-0x3FFF8192tp-s3.4dCRC(90c9d0b9) (Fluke: 6BDD)
0x4000-0x5FFF8192tp-s2.2dCRC(444b6a1d) (Fluke: D14E)
0x6000-0x7FFF8192tp-s1.1dCRC(391097cd) (Fluke: CA3E)
Memory Area:user1
Address RangeLengthLabel/LocationDescription
0x0000-0x0FFF4096tp-b3.13dCRC(b80ef399) (Fluke: 2F79)
0x1000-0x2FFF8192tp-b5.11bCRC(0f260bfe) (Fluke: A54F)
0x3000-0x4FFF8192tp-b2.11dCRC(8cd2c917) (Fluke: ED62)
0x5000-0x6FFF8192tp-b4.19cCRC(6600f306) (Fluke: C4BC)
Memory Area:user2
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFF8192tp-c.8CRC(9f31ecb5) (Fluke: CB46)
0x2000-0x3FFF8192tp-c.7CRC(cbf093f1) (Fluke: C4A6)
0x4000-0x5FFF8192tp-c.6CRC(11f9752b) (Fluke: 8D08)
0x6000-0x7FFF8192tp-c.5CRC(513f8777) (Fluke: E284)
0x8000-0x9FFF8192tp-c.1CRC(ef573117) (Fluke: 4349)
0xA000-0xBFFF8192tp-c.2CRC(1d29f1e6) (Fluke: 4718)
0xC000-0xDFFF8192tp-c.3CRC(086511a7) (Fluke: 0C64)
0xE000-0xFFFF8192tp-c.4CRC(49f372ea) (Fluke: 6218)
0x12000-0x12FFF4096tp-g2.e13CRC(4a7407a2) (Fluke: C6AB)
0x13000-0x13FFF4096tp-g1.f13CRC(f0b26c2e) (Fluke: 5943)
0x14000-0x15FFF8192tp-g6.h2CRC(105cb9e4) (Fluke: 1D33)
0x16000-0x17FFF8192tp-g5.i2CRC(27e5e6c1) (Fluke: 303B)
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