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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.
The Pit (Zilec Electronics (Taito license), 1982)
Memory Area:audio_io_map
Address RangeLengthFunctionDescription
0x00001Device Writesoundlatch, generic_latch_8_device, clear_w
0x008C-0x008D2Device Writeay2, ay8910_device, address_data_w
0x008D1Device Readay2, ay8910_device, data_r
0x008E-0x008F2Device Writeay1, ay8910_device, address_data_w
0x008F1Device Readay1, ay8910_device, data_r
Memory Area:audio_map
Address RangeLengthFunctionDescription
0x0000-0x1FFF8192ROM
0x3800-0x3BFF1024RAM
Memory Area:thepit_main_map
Address RangeLengthFunctionDescription
0x0000-0x4FFF20480ROM
0x8000-0x87FF2048RAM
0x8800-0x8BFF1024Mirror, RAM Write, Shared0x0400, colorram_w, colorram
0x9000-0x93FF1024Mirror, RAM Write, Shared0x0400, videoram_w, videoram
0x9800-0x983F64Mirror, RAM, Shared0x0700, , attributesram
0x9840-0x985F32RAM, Sharedspriteram
0x9860-0x98FF160RAM
0xA0001Read, Write NOPinput_port_0_r, (// Not hooked up according to the schematics)
0xA8001Read PortIN1
0xB0001Read Port, WriteDSW, nmi_mask_w
0xB0011Write NOP(// Unused, but initialized)
0xB0021Write NOP(// coin_lockout_w)
0xB0031Writesound_enable_w
0xB004-0xB0052Write NOP(// Unused, but initialized)
0xB0061Writeflip_screen_x_w
0xB0071Writeflip_screen_y_w
0xB8001Device Read, Device Writewatchdog, watchdog_timer_device, reset_r, soundlatch, generic_latch_8_device, write
 

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:audiocpu
Address RangeLengthLabel/LocationDescription
0x0000-0x07FF2048pit07.ic30CRC(2d4881f9) (Fluke: 2D9D)
0x0800-0x0FFF2048pit06.ic31CRC(c9d8c1cc) (Fluke: CD1F)
Memory Area:gfx1
Address RangeLengthLabel/LocationDescription
0x0000-0x07FF2048pit08.ic9CRC(00dce65f) (Fluke: 72F7)
0x1000-0x17FF2048pit09.ic8CRC(a2e2b218) (Fluke: 1D79)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x0000-0x0FFF4096pit01.ic38CRC(87c269bf) (Fluke: 2CCB)
0x1000-0x1FFF4096pit02.ic39CRC(e1dfd360) (Fluke: 3F56)
0x2000-0x2FFF4096pit03.ic40CRC(3674ccac) (Fluke: 1988)
0x3000-0x3FFF4096pit04.ic41CRC(bddde829) (Fluke: 28FD)
0x4000-0x4FFF4096pit05.ic33CRC(584d1546) (Fluke: 2FBB)
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0000-0x001F3282s123.ic4CRC(a758b567) (Fluke: 8A87)
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