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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.
TomCat (Atari, 1985)
Memory Area:dsp_map
Address RangeLengthFunctionDescription
0x0000-0x0FFF4096RAM, Sharedshared_ram
Memory Area:sound_map
Address RangeLengthFunctionDescription
0x0000-0x1FFF8192RAM
0x2000-0x20012Device Read/Writeymsnd, ym2151_device, read, write
0x3000-0x30DF224Writesoundlatches_w
0x30E01Read/Write NOP(// COINRD Inputs: D7 = Coin L, D6 = Coin R, D5 = SOUNDFLAG)
0x5000-0x507F128RAM(// 6532 ram)
0x5080-0x509F32Device Read/Writeriot, riot6532_device, read, write
0x6000-0x601F32Device Read/Writepokey1, pokey_device, read, write
0x7000-0x701F32Device Read/Writepokey2, pokey_device, read, write
0x8000-0xFFFF32768Read/Write NOP(// main sound program rom)
Memory Area:tomcat_map
Address RangeLengthFunctionDescription
0x0000-0xFFFF65536ROM
0x402000-0x4020012Read, Writetomcat_adcread_r, tomcat_adcon_w
0x404000-0x4040012Read, Device Writetomcat_inputs_r, avg, avg_tomcat_device, go_word_w
0x406000-0x4060012Device Writeavg, avg_tomcat_device, reset_word_w
0x408000-0x4080012Read, Device Writetomcat_inputs2_r, watchdog, watchdog_timer_device, reset16_w
0x40A000-0x40A0012Read/Writetomcat_320bio_r, tomcat_irqclr_w
0x40E000-0x40E0012Writetomcat_led1on_w
0x40E002-0x40E0032Writetomcat_led2on_w
0x40E004-0x40E0052Writetomcat_mresl_w
0x40E006-0x40E0072Writetomcat_sndresl_w
0x40E008-0x40E0092Writetomcat_lnkmodel_w
0x40E00A-0x40E00B2Writetomcat_errl_w
0x40E00C-0x40E00D2Writetomcat_ackl_w
0x40E00E-0x40E00F2Writetomcat_txbuffl_w
0x40E010-0x40E0112Writetomcat_led1off_w
0x40E012-0x40E0132Writetomcat_led2off_w
0x40E014-0x40E0152Writetomcat_mresh_w
0x40E016-0x40E0172Writetomcat_sndresh_w
0x40E018-0x40E0192Writetomcat_lnkmodeh_w
0x40E01A-0x40E01B2Writetomcat_errh_w
0x40E01C-0x40E01D2Writetomcat_ackh_w
0x40E01E-0x40E01F2Writetomcat_txbuffh_w
0x800000-0x803FFF16384RAM, Sharedvectorram
0xFFA000-0xFFBFFF8192RAM, Sharedshared_ram
0xFFC000-0xFFCFFF4096RAM
0xFFD000-0xFFDFFF4096Device Read/Write 8-bitm48t02, timekeeper_device, read, write, 0xff00
0xFFD000-0xFFDFFF4096Read/Write 8-bittomcat_nvram_r, tomcat_nvram_w, 0x00ff
 

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:user1
Address RangeLengthLabel/LocationDescription
0x0000-0x00FF256136021-105.1lCRC(82fc3eb2),AVG PROM
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