----------------------------------------------------------------------------
 genecyst save state format
 ----------------------------------------------------------------------------

 All addresses/ranges are given as hexadecimal offsets in a '.GS0' file.

 Range        Size   Description
 -----------  -----  -----------
 00000-00002  3      "GST"
 00006-00007  2      "\xE0\x40"
 000FA-00112  24     VDP registers
 00112-00191  128    Color RAM
 00192-001E1  80     Vertical scroll RAM
 001E4-003E3  512    YM2612 registers
 00474-02473  8192   Z80 RAM
 02478-12477  65536  68K RAM
 12478-22477  65536  Video RAM

 All data is stored in little endian format, except for the Vertical
 Scroll RAM, 68000 RAM, and Video RAM, which are in big endian format.

 Z80 registers
 -------------

 00404 : AF
 00408 : BC
 0040C : DE
 00410 : HL
 00414 : IX
 00418 : IY
 0041C : PC
 00420 : SP
 00424 : AF'
 00428 : BC'
 0042C : DE'
 00430 : HL'
 00434 : I

 The 'R' register is not supported.
 The interrupt mode is always presumed to be 'IM 1'

 68000 registers
 ---------------

 80-9F : D0-D7
 A0-BF : A0-A7
 C8    : PC
 D0    : SR

 Missing Info
 ------------

 SN76489 data
 VDP state

 Miscellaneous
 -------------

 The 68000 register locations came from the DGen source code.

 Bart Trzynadlowski supplied the byte ordering and header validity
 information.

 Any information on the KGen save state layout would be appreciated.


 Charles MacDonald
 WWW: http://www.emucamp.com/cgfm2/