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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.
Blaster (Williams / Vid Kidz, 1983)
Memory Area:blaster_map
Address RangeLengthFunctionDescription
0x0000-0x3FFF16384Read Bank, Write Only, Sharedbank1, , videoram
0x4000-0x8FFF20480Read Bank, Write Onlybank2,
0x9000-0xBFFF12288RAM
0xBB00-0xBBFF256Write Only, Sharedblaster_pal0
0xBC00-0xBCFF256Write Only, Sharedblaster_scan
0xC000-0xC00F16Mirror, Write Only, Shared0x03f0, , paletteram
0xC804-0xC8074Mirror, Device Read/Write0x00f0, pia_0, pia6821_device, read, write
0xC80C-0xC80F4Mirror, Device Read/Write0x00f0, pia_1, pia6821_device, read, write
0xC900-0xC93F64Writeblaster_vram_select_w
0xC940-0xC97F64Writeblaster_remap_select_w
0xC980-0xC9BF64Writeblaster_bank_select_w
0xC9C0-0xC9FF64Writeblaster_video_control_w
0xCA00-0xCA078Mirror, Write0x00f8, williams_blitter_w
0xCB00-0xCBFF256Readwilliams_video_counter_r
0xCBFF1Writewilliams_watchdog_reset_w
0xCC00-0xCFFF1024RAM Write, Sharedwilliams_cmos_w, nvram
0xD000-0xFFFF12288ROM
Memory Area:sound_map_b
Address RangeLengthFunctionDescription
0x0000-0x007F128RAM(/* internal RAM */)
0x0080-0x00FF128RAM(/* MC6810 RAM */)
0x0400-0x04034Mirror, Device Read/Write0x8000, pia_2b, pia6821_device, read, write
0xB000-0xFFFF20480ROM
 

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:maincpu
Address RangeLengthLabel/LocationDescription
0xD000-0xDFFF409616.ic39CRC(54a40b21) (Fluke: BD38)
0xD000-0xDFFF409616.ic39CRC(54a40b21) (Fluke: E87A)
0xE000-0xFFFF819213.ic27CRC(f4dae4c8) (Fluke: 46C6)
0xE000-0xFFFF819213.ic27CRC(f4dae4c8) (Fluke: CFEC)
0x10000-0x11FFF819211.ic25CRC(6371e62f) (Fluke: 1308)
0x10000-0x11FFF819211.ic25CRC(6371e62f) (Fluke: 719C)
0x12000-0x13FFF819212.ic26CRC(9804faac) (Fluke: DEC4)
0x12000-0x13FFF819212.ic26CRC(9804faac) (Fluke: 125E)
0x14000-0x14FFF409617.ic41CRC(bf96182f) (Fluke: 1904)
0x14000-0x14FFF409617.ic41CRC(bf96182f) (Fluke: 8E22)
0x18000-0x1BFFF1638415.ic38CRC(1ad146a4) (Fluke: 79FD)
0x18000-0x1BFFF1638415.ic38CRC(1ad146a4) (Fluke: 79FD)
0x1C000-0x1FFFF163848.ic20CRC(f110bbb0) (Fluke: BF53)
0x1C000-0x1FFFF163848.ic20CRC(f110bbb0) (Fluke: BF53)
0x20000-0x23FFF163849.ic22CRC(5c5b0f8a) (Fluke: F2A6)
0x20000-0x23FFF163849.ic22CRC(5c5b0f8a) (Fluke: F2A6)
0x24000-0x27FFF1638410.ic24CRC(d47eb67f) (Fluke: B4E4)
0x24000-0x27FFF1638410.ic24CRC(d47eb67f) (Fluke: B4E4)
0x28000-0x2BFFF163846.ic13CRC(47fc007e) (Fluke: 30CD)
0x28000-0x2BFFF163846.ic13CRC(47fc007e) (Fluke: 30CD)
0x2C000-0x2FFFF163845.ic11CRC(15c1b94d) (Fluke: 935E)
0x2C000-0x2FFFF163845.ic11CRC(15c1b94d) (Fluke: 935E)
0x30000-0x33FFF1638414.ic35CRC(aea6b846) (Fluke: FAE8)
0x30000-0x33FFF1638414.ic35CRC(aea6b846) (Fluke: FAE8)
0x34000-0x37FFF163847.ic15CRC(7a101181) (Fluke: 4B37)
0x34000-0x37FFF163847.ic15CRC(7a101181) (Fluke: 63AD)
0x38000-0x3BFFF163841.ic1CRC(8d0ea9e7) (Fluke: 801F)
0x38000-0x3BFFF163841.ic1CRC(8d0ea9e7) (Fluke: 801F)
0x3C000-0x3FFFF163842.ic3CRC(03c4012c) (Fluke: 40EA)
0x3C000-0x3FFFF163842.ic3CRC(03c4012c) (Fluke: 40EA)
0x40000-0x43FFF163844.ic7CRC(fc9d39fb) (Fluke: 6523)
0x40000-0x43FFF163844.ic7CRC(fc9d39fb) (Fluke: EE21)
0x44000-0x47FFF163843.ic6CRC(253690fb) (Fluke: 7E90)
0x44000-0x47FFF163843.ic6CRC(253690fb) (Fluke: 045F)
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0000-0x07FF2048blaster.colCRC(bac50bc4) (Fluke: E7A6)
0x0000-0x07FF2048blaster.colCRC(bac50bc4) (Fluke: E7A6)
0x0000-0x07FF2048blaster.colCRC(bac50bc4) (Fluke: E7A6)
0x0800-0x09FF5124.u42CRC(e6631c23) (Fluke: 5702)
0x0800-0x09FF5124.u42CRC(e6631c23) (Fluke: 5702)
0x0800-0x09FF5124.u42CRC(e6631c23) (Fluke: 5702)
0x0A00-0x0BFF5126.u23CRC(83faf25e) (Fluke: B999)
0x0A00-0x0BFF5126.u23CRC(83faf25e) (Fluke: B999)
0x0A00-0x0BFF5126.u23CRC(83faf25e) (Fluke: B999)
Memory Area:soundcpu
Address RangeLengthLabel/LocationDescription
0xF000-0xFFFF409618.sb13CRC(c33a3145) (Fluke: 2BD0)
0xF000-0xFFFF409618.sb13CRC(c33a3145) (Fluke: 2BD0)
Memory Area:soundcpu_b
Address RangeLengthLabel/LocationDescription
0xF000-0xFFFF409618.sb10CRC(c33a3145) (Fluke: 2BD0)
0xF000-0xFFFF409618.sb10CRC(c33a3145) (Fluke: 2BD0)
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