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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.
Host Invaders (The Game Room, 1998)
Memory Area:calchase_io
Address RangeLengthFunctionDescription
0x00E8-0x00EF8Read/Write NOP(//AMI BIOS write to this ports as delays between I/O ports operations sending al value -> NEWIODELAY)
0x0170-0x01778Read/Write NOP(//To debug)
0x01F0-0x01F78Device Read/Writeide, ide_controller_32_device, read_cs0, write_cs0
0x0200-0x021F32Read/Write NOP(//To debug)
0x0260-0x026F16Read/Write NOP(//To debug)
0x0278-0x027B4Write NOP(//AM_WRITE(pnp_config_w))
0x0278-0x02FF136Read/Write NOP(//To debug)
0x0280-0x02878Read/Write NOP(//To debug)
0x02A0-0x02A78Read/Write NOP(//To debug)
0x02C0-0x02C78Read/Write NOP(//To debug)
0x02E0-0x02EF16Read/Write NOP(//To debug)
0x02F8-0x02FF8Read/Write NOP(//To debug)
0x0320-0x038F112Read/Write NOP(//To debug)
0x0378-0x037F8Read/Write NOP(//To debug)
0x03A0-0x03A78Read/Write NOP(//To debug)
0x03B0-0x03BF16Device Read/Write 8-bitvga, trident_vga_device, port_03b0_r, port_03b0_w, 0xffffffff
0x03C0-0x03CF16Device Read/Write 8-bitvga, trident_vga_device, port_03c0_r, port_03c0_w, 0xffffffff
0x03D0-0x03DF16Device Read/Write 8-bitvga, trident_vga_device, port_03d0_r, port_03d0_w, 0xffffffff
0x03E0-0x03EF16Read/Write NOP(//To debug)
0x03F0-0x03F78Device Read/Writeide, ide_controller_32_device, read_cs1, write_cs1
0x03F8-0x03FF8Read/Write NOP(// To debug Serial Port COM1:)
0x0A78-0x0A7B4Write NOP(//AM_WRITE(pnp_data_w))
0x0CF8-0x0CFF8Device Read/Writepcibus, pci_bus_legacy_device, read, write
0x42E8-0x43EF264Read/Write NOP(//To debug)
0x43C4-0x43CB8Device Read/Write 8-bitvga, trident_vga_device, port_43c6_r, port_43c6_w, 0xffffffff (// Trident Memory and Video Clock register)
0x46E8-0x46EF8Read/Write NOP(//To debug)
0x4AE8-0x4AEF8Read/Write NOP(//To debug)
0x83C4-0x83CB8Device Read/Write 8-bitvga, trident_vga_device, port_83c6_r, port_83c6_w, 0xffffffff (// Trident LUTDAC)
0x92E8-0x92EF8Read/Write NOP(//To debug)
Memory Area:calchase_map
Address RangeLengthFunctionDescription
0x0000-0x9FFFF655360RAM
0xA0000-0xBFFFF131072Device Read/Write 8-bitvga, trident_vga_device, mem_r, mem_w, 0xffffffff (// VGA VRAM)
0xC0000-0xC7FFF32768RAM, Regionvideo_bios, 0
0xC8000-0xCFFFF32768Read/Write NOP
0xD0004-0xD00074Read 16-bitcalchase_iocard1_r, 0x0000ffff
0xD0008-0xD000B4Write NOP(// ???)
0xD000C-0xD000F4Read 16-bitcalchase_iocard2_r, 0x0000ffff
0xD0024-0xD00274Device Write 16-bitldac, dac_word_interface, write, 0x0000ffff
0xD0028-0xD002B4Device Write 16-bitrdac, dac_word_interface, write, 0x0000ffff
0xD0030-0xD00334Read 16-bitcalchase_iocard4_r, 0x0000ffff
0xD0030-0xD00334Read 16-bitcalchase_iocard3_r, 0xffff0000
0xD0034-0xD00374Read 16-bitcalchase_iocard5_r, 0x0000ffff
0xD0800-0xD0FFF2048RAM(// GAME_CMOS)
0xD0800-0xD0FFF2048ROM, Regionnvram,0 (//)
0xE0000-0xEFFFF65536ROM Bank, Writebios_ext, bios_ext_ram_w
0xF0000-0xFFFFF65536ROM Bank, Writebios_bank, bios_ram_w
0x100000-0x3FFFFFF66060288RAM(// 64MB)
0x2000000-0x28FFFFFF654311424Read/Write NOP
0xFFFE0000-0xFFFFFFFF131072ROM, Regionbios, 0 (/* System BIOS */)
 

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:bios
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFFF131072hostinv_bios.binCRC(5111e4b8)
Memory Area:nvram
Address RangeLengthLabel/LocationDescription
0x0000-0x07FF2048ds1220y_hostinv.bin
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