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                            PC-DRAGON 6809 EMULATOR
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 1    VERSION HISTORY


 V2.00 - 07 NOV 1994 : Major new version
 V2.01 - 01 DEC 1994 : Bug-fix release
 V2.02 - 08 JUN 1997 : Bug-fix release


                                         
 2    CHANGES

 
 Changes from V2.01 to V2.02:

 - Fixed bug causing the DAA instruction to behave unreliably.

 - Fixed disassembly of indexed modes "5,r", "6,r" and "11,r".

 - Fixed bugs preventing the use of relative pathnames as filenames.

 - Fixed bug which caused snapshots containing memory only (ROM cartridges)
   to corrupt the 6809.

 - Fixed bug which prevented DGN files from loading correctly if specified on
   the command line complete with an extension.

 - Changed the default string assigned to the key combination Alt-F4.

 - Maximised the emulators acceptance of "/" as an alternative to "\".

 - Added support for multiple page prefixes to 6809 engine, debugger and
   disassembler.
      
 - Added support for V1.4 snapshots with zero length (CoCo2 V1.5 format).

 - Added an FIRQ trigger when snapshots starting at $C000 are loaded.

 - Changed the help information displayed by DC.EXE (no functional changes).

 - Enhanced WHATIS.EXE to recognise the following file types: snapshots
   containing memory only (ROM cartridges), snapshots with zero length (CoCo2
   V1.5 format), snapshots without emulator settings (T3 V0.8 format),
   snapshots with variable length emulator settings (future versions of T3),
   T3 task images, Win16 and Win32 executables, JFIF compliant images (JPEG,
   JPG and JIF), PCX images.

 - Repackaged PC-Dragon as two "freeware" ZIP files. The first contains the
   emulator executables and the reference manual in ASCII format. The second
   contains the source code and a postscript version of the reference manual.

 - Made various updates and corrections to documentation.

 
 Changes from V2.00 to V2.01:
 
 - Fixed ugly bug which caused keyboard to hang after debugger functions B,
   O, X and V if 'Real Mode' keyboard emulation was selected.
 
 - Fixed bug causing disassembly of CWAI instruction to display "CWAICC".
 
 - Fixed bug causing relative speed measurement to be wrong after IRQ rate
   adjusted using options menu.
 
 - Fixed refresh bugs after debugger memory edit and fill functions.
 
 - Changed V1.4 snapshot SB volume from 1 to 0, and SB type from 255 to 3.
 
 - Added feature which enables use of Dragon 32 snapshots with Dragon 64 ROM.
 
 - Added facility for specifying snapshot portability. Introduced filetype
   D96 for this purpose, and V2.1 of snapshot extensions.
 
 - Can now use DOWN cursor key to scroll disassembly screen.