*****************************************************************
* File format of the TiEmu v2.0 image files						*
* Documentation by Romain Lievin <roms@tilp.info>				*
*																*
* Begin: 17/05/2005												*
* Last update: 17/04/2005										*
*****************************************************************


Remark: I use the C notation for numbers (12: decimal, 0x1A: hexadecimal, 
'C': character). Moreover, all words are in LSB-MSB format.

This document describes the file format of *.img files.
An TiEmu image file is a composite file which contains:
- a header section
- a pure data section


The TiEmu v2.00 image format (revision 2)
-----------------------------------------

  The following is a table of the bytes that make up a such file.

  Address		Size	What It Contains
  ---------------------------------------------------------------------------
  0x00-0x0F	0-15	16	a signature: "TiEmu img v2.00" (NULL-padded)
  
  0x10-0x13	16-19	4	structure revision (2)
  0x14-0x17	20-23	4	offset to the data section (0x40)
  0x18		24		1	calculator type (2 = TI92)
  0x19-0x1F	25-29	5	firmware revision ("2.08\0")
  0x1E		30		1	FLASH/PROM (2/0)
  0x1F		31		1	has boot (1/0)
  0x20-0x23	32-35	4	pure data size
  0x24		36		1	hw type (1/2/3)
  0x25		37		1	ROM base address
  0x26		38-59	n	filled with 0 (reserved for future use)
  0x3c-0x3f	60-63	4	pointer on data (unused here)
  
  0x40-..	64-..		pure data (ROM image)
 
 
 
Calculator type (libtifiles defs):

#define TI92 		(1 << 0)
#define TI89 		(1 << 1)
#define TI92p	 	(1 << 2)
#define V200		(1 << 3)
#define TI89t		(1 << 4)
 
FLASH upgrade does not have boot block.


The TiEmu v2.00 save format (revision 12)
-----------------------------------------

  The following is a table of the bytes that make up a such file.

  Before this header, there is a "TiEmu v2.00 image format" header.
  And next, there is the following header:

  Address		Size	What It Contains
  ---------------------------------------------------------------------------


  0x40-0x43	0-3		4	structure revision (12)
  0x44-0x47	4-7		4	size of structure
  0x48-0x4b	8-11	4	offset to M68K area
  0x4c-0x4f	12-15	4	offset to IO area
  0x50-0x53	16-19	4	offset to RAM area
  0x54-0x57	20-23	4	offset to extra infos
  0x58-0x5b	24-27	4	offset to bkpts area
  0x5c-0x5f	28-31	4	offset to FLASH changes
  0x60-0x63 32-35	4	offset to image location (size + string)