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.
Memory Area:starcrus_io_map
Address RangeLengthFunctionDescription
0x00001Read Port, WriteP1, s1_x_w
0x0001Joystick LeftActive Low
0x0002Button 2Active Low
0x0004Joystick RightActive Low
0x0008UnknownActive Low
0x0010Button 3Active Low
0x0020UnknownActive Low
0x0040Button 1Active Low
0x0080UnknownActive Low
0x00011Read Port, WriteP2, s1_y_w
0x0001Joystick LeftActive Low
0x0002Button 2Active Low
0x0004Joystick RightActive Low
0x0008UnknownActive Low
0x0010Button 3Active Low
0x0020UnknownActive Low
0x0040Button 1Active Low
0x0080UnknownActive Low
0x00021Read/Writecoll_det_r, s2_x_w
0x00031Read Port, WriteDSW, s2_y_w
0x000360 secsActive High
0x000290 secsActive High
0x0001120 secsActive High
0x0000150 secsActive High
0x00042C_1CActive High
0x00001C_1CActive High
0x0008Coin 2Active Low
0x0010Coin 1Active Low
0x0020StandardActive High
0x0000AlternateActive High
0x0040UnknownActive Low
0x0080UnknownActive Low
0x00041Writep1_x_w
0x00051Writep1_y_w
0x00061Writep2_x_w
0x00071Writep2_y_w
0x00081Writeship_parm_1_w
0x00091Writeship_parm_2_w
0x000A1Writeproj_parm_1_w
0x000B1Writeproj_parm_2_w
Memory Area:starcrus_map
Address RangeLengthFunctionDescription
0x0000-0x0FFF4096ROM
0x1000-0x10FF256RAM
 

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:gfx1
Address RangeLengthLabel/LocationDescription
0x0000-0x01FF512starcrus.e6CRC(54887a25) (Fluke: BFC3)
Memory Area:gfx2
Address RangeLengthLabel/LocationDescription
0x0000-0x01FF512starcrus.l2CRC(54887a25) (Fluke: BFC3)
Memory Area:gfx3
Address RangeLengthLabel/LocationDescription
0x0000-0x01FF512starcrus.j4CRC(25f15ae1) (Fluke: 0185)
0x0200-0x03FF512starcrus.g5CRC(73b27f6e) (Fluke: 50DE)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x0000-0x01FF512starcrus.j1CRC(0ee60a50) (Fluke: 9CEC)
0x0200-0x03FF512starcrus.k1CRC(a7bc3bc4) (Fluke: 86B3)
0x0400-0x05FF512starcrus.l1CRC(10d233ec) (Fluke: AF8E)
0x0600-0x07FF512starcrus.m1CRC(2facbfee) (Fluke: 5935)
0x0800-0x09FF512starcrus.n1CRC(42083247) (Fluke: 1052)
0x0A00-0x0BFF512starcrus.p1CRC(61dfe581) (Fluke: 0B8A)
0x0C00-0x0DFF512starcrus.r1CRC(010cdcfe) (Fluke: 28C2)
0x0E00-0x0FFF512starcrus.s1CRC(da4e276b) (Fluke: 7F73)
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