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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.
Imago (Acom, 1983)
Memory Area:fastfred_map
Address RangeLengthFunctionDescription
0x0000-0xBFFF49152ROM
0xC000-0xC7FF2048RAM
0xD000-0xD3FF1024Mirror, RAM Write, Shared0x400, fastfred_videoram_w, videoram
0xD800-0xD83F64RAM Write, Sharedfastfred_attributes_w, attributesram
0xD840-0xD85F32RAM, Sharedspriteram
0xD860-0xDBFF928RAM(// Unused, but initialized)
0xE0001Read Port, Write Only, SharedBUTTONS, , bgcolor
0xE8001Read PortJOYS
0xF0001Read Port, Write NOPDSW,
0x00002Active High
0x00013Active High
0x00024Active High
0x00035Active High
0x0004OffActive High
0x0000OnActive High
0x00385C_1CActive High
0x00184C_1CActive High
0x00283C_1CActive High
0x00082C_1CActive High
0x00001C_1CActive High
0x00201C_2CActive High
0x00101C_3CActive High
0x00301C_4CActive High
0x0040OffActive High
0x0000OnActive High
0x0080OffActive High
0x0000OnActive High
0xF0011Writenmi_mask_w
0xF0021Writefastfred_colorbank1_w
0xF0031Writefastfred_colorbank2_w
0xF0041Writefastfred_charbank1_w
0xF0051Writefastfred_charbank2_w
0xF0061Writefastfred_flip_screen_x_w
0xF0071Writefastfred_flip_screen_y_w
0xF1161Writefastfred_flip_screen_x_w
0xF1171Writefastfred_flip_screen_y_w
0xF8001Device Read, Device Writewatchdog, watchdog_timer_device, reset_r, soundlatch, generic_latch_8_device, write
Memory Area:imago_map
Address RangeLengthFunctionDescription
0x0000-0x0FFF4096ROM
0x1000-0x1FFF4096Readimago_sprites_offset_r
0x2000-0x6FFF20480ROM
0xB000-0xB3FF1024RAM(// same fg videoram (which one of the 2 is really used?))
0xB800-0xBFFF2048RAM Writeimago_sprites_dma_w
0xC000-0xC7FF2048RAM
0xC800-0xCBFF1024RAM Write, Sharedimago_fg_videoram_w, imago_fg_vram
0xD000-0xD3FF1024RAM Write, Sharedfastfred_videoram_w, videoram
0xD800-0xD83F64RAM Write, Sharedfastfred_attributes_w, attributesram
0xD840-0xD85F32RAM, Sharedspriteram
0xD860-0xD8FF160RAM(// Unused, but initialized)
0xE0001Read PortBUTTONS
0xE8001Read PortJOYS
0xF0001Read Port, Write NOPDSW, (// writes 1 when level starts, 0 when game over)
0x00002Active High
0x00013Active High
0x00024Active High
0x00035Active High
0x0004OffActive High
0x0000OnActive High
0x00385C_1CActive High
0x00184C_1CActive High
0x00283C_1CActive High
0x00082C_1CActive High
0x00001C_1CActive High
0x00201C_2CActive High
0x00101C_3CActive High
0x00301C_4CActive High
0x0040OffActive High
0x0000OnActive High
0x0080OffActive High
0x0000OnActive High
0xF0011Writenmi_mask_w
0xF0021Writefastfred_colorbank1_w
0xF0031Writefastfred_colorbank2_w
0xF0041Writeimago_dma_irq_w
0xF0051Writeimago_charbank_w
0xF0061Writefastfred_flip_screen_x_w
0xF0071Writefastfred_flip_screen_y_w
0xF4001Write NOP(// writes 0 or 2)
0xF4011Writeimago_sprites_bank_w
0xF8001Read NOP, Device Writesoundlatch, generic_latch_8_device, write
Memory Area:sound_map
Address RangeLengthFunctionDescription
0x0000-0x1FFF8192ROM
0x2000-0x23FF1024RAM
0x30001Device Read, Writesoundlatch, generic_latch_8_device, read, sound_nmi_mask_w
0x40001Write Only(// Reset PSG's)
0x5000-0x50012Device Writeay8910.1, ay8910_device, address_data_w
0x6000-0x60012Device Writeay8910.2, ay8910_device, address_data_w
0x70001Read NOP(// only for Imago, read but not used)
 

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
0x0000-0x0FFF4096imago08.60CRC(4f77c2c9)
Memory Area:gfx1
Address RangeLengthLabel/LocationDescription
0x0000-0x0FFF4096imago01.39CRC(f09fe0d4)
0x1000-0x1FFF4096imago02.40CRC(71354480)
0x2000-0x2FFF4096imago03.41CRC(7aba3d98)
Memory Area:gfx2
Address RangeLengthLabel/LocationDescription
0x0000-0x0FFF4096imago04.51CRC(ed987b3e)
0x1000-0x1FFF4096imago05.52CRC(77ee68ce)
0x2000-0x2FFF4096imago07.56CRC(48b35190)
0x3000-0x3FFF4096imago06.55CRC(136990fc)
0x4000-0x4FFF4096imago09.64CRC(9efb806d)
0x5000-0x5FFF4096imago10.65CRC(801a18d3)
Memory Area:gfx3
Address RangeLengthLabel/LocationDescription
0x0000-0x0FFF4096imago14.170CRC(eded37f6)
Memory Area:gfx4
Address RangeLengthLabel/LocationDescription
0x0000-0x0FFF4096imago15.191CRC(85fcc195)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x0000-0x0FFF4096imago11.82CRC(3cce69b4)
0x3000-0x4FFF8192imago12.83CRC(8dff98c0)
0x5000-0x6FFF8192imago13.84CRC(f0f14b4d)
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0000-0x00FF256imago.96CRC(5ba81edc)
0x0100-0x01FF256imago.95CRC(e2b7aa09)
0x0200-0x02FF256imago.97CRC(e28a7f00)
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