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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.
D-Day (Olympia (Centuri license), 1982)
Memory Area:dday_map
Address RangeLengthFunctionDescription
0x0000-0x3FFF16384ROM
0x40001Writedday_sl_control_w
0x5000-0x53FF1024RAM Write, Shareddday_textvideoram_w, textvideoram
0x5400-0x57FF1024RAM Write, Shareddday_fgvideoram_w, fgvideoram
0x5800-0x5BFF1024RAM Write, Shareddday_bgvideoram_w, bgvideoram
0x5C00-0x5FFF1024Read/Write, Shareddday_colorram_r, dday_colorram_w, colorram
0x6000-0x63FF1024RAM
0x6400-0x64012Mirror, Device Write0x000e, ay1, ay8910_device, address_data_w
0x6800-0x68012Device Writeay2, ay8910_device, address_data_w
0x6C001Read PortBUTTONS
0x70001Read PortDSW0
0x74001Read PortDSW1
0x78001Read/Writedday_countdown_timer_r, dday_control_w
0x7C001Read PortPADDLE
 

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
0x0000-0x07FF2048k4_73.binCRC(fa6237e4) (Fluke: 3F37)
0x0800-0x0FFF2048k2_71.binCRC(f85461de) (Fluke: 0A99)
0x1000-0x17FF2048k3_72.binCRC(fdfe88b6) (Fluke: DF0A)
Memory Area:gfx2
Address RangeLengthLabel/LocationDescription
0x0000-0x07FF2048j8_70-c.binCRC(a0c6b86b) (Fluke: 8F43)
0x0800-0x0FFF2048j9_69-c.binCRC(d352a3d6) (Fluke: 94DF)
Memory Area:gfx3
Address RangeLengthLabel/LocationDescription
0x0000-0x07FF2048k6_74.binCRC(d21a3e22) (Fluke: 2C8C)
0x0800-0x0FFF2048k7_75.binCRC(a5e5058c) (Fluke: 513A)
Memory Area:gfx4
Address RangeLengthLabel/LocationDescription
0x0000-0x07FF2048d4_68.binCRC(f3649264) (Fluke: C569)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x0000-0x0FFF4096e8_63-c.binCRC(d4fa3ae3) (Fluke: 740C)
0x1000-0x1FFF4096e7_64-c.binCRC(9fb8b1a7) (Fluke: 6CCE)
0x2000-0x2FFF4096e6_65-c.binCRC(4c210686) (Fluke: 54AE)
0x3000-0x3FFF4096e5_66-c.binCRC(e7e832f9) (Fluke: 7F14)
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0000-0x00FF256dday.m11CRC(aef6bbfc),red component (Fluke: A8BB)
0x0100-0x01FF256dday.m8CRC(ad3314b9),green component (Fluke: EDB4)
0x0200-0x02FF256dday.m3CRC(e877ab82),blue component (Fluke: E0F6)
Memory Area:user1
Address RangeLengthLabel/LocationDescription
0x0000-0x0FFF4096d2_67.binCRC(2b693e42),search light map (Fluke: 9041)
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