DISPLAY4.EXE is designed to display retrieved CCD or IM Series Picture Files. However after specific requests from users of previous versions of DISPLAY to have the ability of displaying .ACT files, I have included that ability. For best display performance the .ACT file should have the minimum number of holes. However it is extremely usefull even with only 25% of the total, in being able to preview the picture with a view towards completing or abandoning the file. The only limitation on .ACT or .DLX files is that are of the IM Series, ie: Files 0x0224 and above. The program will work with earlier files however the picture will be misaligned, but viewable. Having released Version 4.0, the very next day IM0019 was obtained and when loaded indicated it was corrupted. In Version 4.1 I have revised the rules by which a file is recognised to be corrupt". The format of the IM Series file makes it extremely difficult to retrieve should it be corrupt. Therefore I have relaxed the test on both the CCD and IM Series, and issue an appropriate message. The penalty is of course that corrupt CCD files cannot be written back as an uncorrupted file. However should this be the case the use of DISPLAY2.EXE will overcome this problem
