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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.
Master Boy (Gaelco, 1991)
Memory Area:mastboy_io_map
Address RangeLengthFunctionDescription
0x00381Readport_38_read
0x00391Readnmi_read
Memory Area:mastboy_map
Address RangeLengthFunctionDescription
0x0000-0x3FFF16384ROM(// Internal ROM)
0x4000-0x7FFF16384ROM(// External ROM)
0x8000-0x8FFF4096RAM, Sharedworkram (// work ram)
0x9000-0x9FFF4096RAM, Sharedtileram (// tilemap ram)
0xA000-0xA1FF512RAM, Shared, Mirrorcolram, 0x0e00 (// colour ram)
0xC000-0xFFFF16384Read/Writebanked_ram_r,banked_ram_w (// mastboy bank area read / write)
0xFF000-0xFF7FF2048Read/Write, Sharedbackupram_r,backupram_w, nvram
0xFF800-0xFF8078Read PortP1
0x0001Coin 1Active Low
0x001eUnusedActive Low
0x0020Button 2Active Low
0x0040Button 1Active Low
0x0080Start 1Active Low
0xFF808-0xFF80F8Read PortP2
0x0001Coin 2Active Low
0x001eUnusedActive Low
0x0020Button 2Active Low
0x0040Button 1Active Low
0x0080Start 2Active Low
0xFF810-0xFF8178Read PortDSW1
0x00011Active High
0x00002Active High
0x0000OffActive High
0x0002OnActive High
0x00081Active High
0x000c2Active High
0x00043Active High
0x00004Active High
0x0010NoActive High
0x0000YesActive High
0x0000Very_HardActive High
0x0020HardActive High
0x0040EasyActive High
0x0060NormalActive High
0x0000OffActive High
0x0080OnActive High
0xFF818-0xFF81F8Read PortDSW2
0x00009C_1CActive High
0x00108C_1CActive High
0x00207C_1CActive High
0x00306C_1CActive High
0x00405C_1CActive High
0x00504C_1CActive High
0x00603C_1CActive High
0x00702C_1CActive High
0x00f01C_1CActive High
0x00e01C_2CActive High
0x00d01C_3CActive High
0x00c01C_4CActive High
0x00b01C_5CActive High
0x00a01C_6CActive High
0x00901C_7CActive High
0x00801C_8CActive High
0x00009C_1CActive High
0x00018C_1CActive High
0x00027C_1CActive High
0x00036C_1CActive High
0x00045C_1CActive High
0x00054C_1CActive High
0x00063C_1CActive High
0x00072C_1CActive High
0x000f1C_1CActive High
0x000e1C_2CActive High
0x000d1C_3CActive High
0x000c1C_4CActive High
0x000b1C_5CActive High
0x000a1C_6CActive High
0x00091C_7CActive High
0x00081C_8CActive High
0xFF820-0xFF8278Writebank_w
0xFF8281Device Writesaa, saa1099_device, data_w
0xFF8291Device Writesaa, saa1099_device, control_w
0xFF8301Writemsm5205_data_w
0xFF8381Writeirq0_ack_w
0xFF8391Writemsm5205_sambit0_w
0xFF83A1Writemsm5205_sambit1_w
0xFF83B1Writemsm5205_reset_w
0xFF83C1Writebackupram_enable_w
0xFFC00-0xFFFFF1024RAM(// Internal RAM)
 

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:gfx2
Address RangeLengthLabel/LocationDescription
0x0000-0x3FFFF26214401.binCRC(36755831) (Fluke: E08D)
0x0000-0xFFFF6553604.binCRC(565932f4) (Fluke: 7A12)
0x40000-0x5FFFF13107202.binCRC(69cf6b7c) (Fluke: D6D3)
0x80000-0x9FFFF13107205.binCRC(394cb674) (Fluke: B7D1)
0xC0000-0xDFFFF13107206.binCRC(aace7120) (Fluke: 20AB)
0x100000-0x11FFFF13107207.binCRC(6618b002) (Fluke: A129)
0x140000-0x15FFFF13107208.binCRC(6a4870dd) (Fluke: AF1E)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x0000-0x3FFF16384hd647180.binCRC(75716dd1) (Fluke: D8C7)
0x0000-0x3FFF16384hd647180.binCRC(75716dd1) (Fluke: D8C7)
0x0000-0x3FFF16384hd647180.binCRC(75716dd1) (Fluke: D8C7)
0x4000-0x7FFF1638403.binCRC(5020a37f) (Fluke: 5C33)
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