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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.
Thayer's Quest (RDI Video Systems, 1984)
Memory Area:thayers_io_map
Address RangeLengthFunctionDescription
0x0000-0x00078Read/Writessi263_register_r, ssi263_register_w
0x00201Writecontrol_w
0x00401Read/Writeirqstate_r, control2_w
0x00801Read/Writecop_data_r, cop_data_w
0x00A01Writetimer_int_ack_w
0x00C01Writedata_rdy_int_ack_w
0x00F01Readlaserdsc_data_r
0x00F11Readdsw_b_r
0x00F21Read PortDSWA
0x0007110 SecondsActive High
0x000695 SecondsActive High
0x000580 SecondsActive High
0x000470 SecondsActive High
0x000360 SecondsActive High
0x000245 SecondsActive High
0x000130 SecondsActive High
0x00002C_1CActive High
0x00081C_1CActive High
0x00103Active High
0x00005Active High
0x0000OffActive High
0x0020OnActive High
0x0040Always PlayingActive High
0x0000One Out of 8 TimesActive High
0x00F31Writeintrq_w
0x00F41Writelaserdsc_data_w
0x00F51Writelaserdsc_control_w
0x00F61Writeden1_w
0x00F71Writeden2_w
Memory Area:thayers_map
Address RangeLengthFunctionDescription
0x0000-0x7FFF32768ROM
0x8000-0xBFFF16384RAM
0xC000-0xDFFF8192ROM
 

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
0x0000-0x7FFF32768tq_u33.binCRC(82df5d89) (Fluke: 5659)
0x0000-0x7FFF32768tq_u33.binCRC(82df5d89) (Fluke: 5659)
0xC000-0xDFFF8192tq_u1.binCRC(e8e7f566) (Fluke: 5C0A)
0xC000-0xDFFF8192tq_u1.binCRC(e8e7f566) (Fluke: A1A9)
Memory Area:mcu
Address RangeLengthLabel/LocationDescription
0x0000-0x03FF1024tq_cop.binCRC(6748e6b3) (Fluke: F2FB)
0x0000-0x03FF1024tq_cop.binCRC(6748e6b3) (Fluke: F2FB)
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