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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.
Exerion (Jaleco, 1983)
Memory Area:main_map
Address RangeLengthFunctionDescription
0x0000-0x5FFF24576ROM
0x6000-0x67FF2048RAM, Sharedmain_ram
0x6008-0x600B4Readexerion_protection_r
0x8000-0x87FF2048RAM, Sharedvideoram
0x8800-0x8BFF1024RAM
0x8800-0x887F128RAM, Sharedspriteram
0xA0001Read PortIN0
0x003fSpecialActive High
0x0040Start 1Active Low
0x0080Start 2Active Low
0xA8001Read PortDSW0
0x00001Active High
0x00012Active High
0x00023Active High
0x00034Active High
0x00045Active High
0x00055Active High
0x00065Active High
0x0007254 (Cheat)Active High
0x000010000Active High
0x000820000Active High
0x001030000Active High
0x001840000Active High
0x0000EasyActive High
0x0020MediumActive High
0x0040HardActive High
0x0060HardestActive High
0x0000UprightActive High
0x0080CocktailActive High
0xB0001Read PortDSW1
0x0001CustomActive High
0x000e5C_1CActive High
0x000a4C_1CActive High
0x00063C_1CActive High
0x00022C_1CActive High
0x00001C_1CActive High
0x00041C_2CActive High
0x00081C_3CActive High
0x000c1C_4CActive High
0x00f0UnusedActive Low
0xC0001Writeexerion_videoreg_w
0xC8001Device Writesoundlatch, generic_latch_8_device, write
0xD000-0xD0012Device Writeay1, ay8910_device, address_data_w
0xD800-0xD8012Device Writeay2, ay8910_device, address_data_w
0xD8021Device Readay2, ay8910_device, data_r
Memory Area:sub_map
Address RangeLengthFunctionDescription
0x0000-0x1FFF8192ROM
0x4000-0x47FF2048RAM
0x60001Device Readsoundlatch, generic_latch_8_device, read
0x8000-0x800C13Writeexerion_video_latch_w
0xA0001Readexerion_video_timing_r
 

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
0x0000-0x1FFF8192exerion.06CRC(435a85a4),fg chars (Fluke: B421)
Memory Area:gfx2
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFF8192exerion.11CRC(f0633a09),sprites (Fluke: C89A)
0x2000-0x3FFF8192exerion.10CRC(80312de0) (Fluke: 5EB5)
Memory Area:gfx3
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFF8192exerion.03CRC(790595b8),bg data (Fluke: BAF4)
0x2000-0x3FFF8192exerion.04CRC(d7abd0b9) (Fluke: A20F)
0x4000-0x5FFF8192exerion.01CRC(5bb755cb) (Fluke: DF11)
0x6000-0x7FFF8192exerion.02CRC(a7ecbb70) (Fluke: 4318)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFF8192exerion.07CRC(4c78d57d) (Fluke: C172)
0x2000-0x3FFF8192exerion.08CRC(dcadc1df) (Fluke: 081E)
0x4000-0x5FFF8192exerion.09CRC(34cc4d14) (Fluke: FF5A)
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0000-0x001F32exerion.e1CRC(2befcc20),palette (Fluke: BA41)
0x0020-0x011F256exerion.i8CRC(31db0e08),fg char lookup table (Fluke: 578C)
0x0120-0x021F256exerion.h10CRC(63b4c555),sprite lookup table (Fluke: CFEF)
0x0220-0x031F256exerion.i3CRC(fe72ab79),bg char lookup table (Fluke: 0BCC)
0x0320-0x041F256exerion.k4CRC(ffc2ba43),bg char mixer (Fluke: CE15)
Memory Area:sub
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFF8192exerion.05CRC(32f6bff5) (Fluke: B5AB)
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