Apple II File Type Notes _____________________________________________________________________________ Developer Technical Support File Type: $08 Auxiliary Type: $4001 Full Name: Packed Apple II Double Hi-Res Graphics File Short Name: Packed Double Hi-Res File Written by: Matt Deatherage November 1988 Files of this type and auxiliary type contain a packed Apple II Double Hi-Res graphics screen. _____________________________________________________________________________ Files of type $08 and auxiliary type $4001 contain a packed Apple II Double Hi-Res graphics screen which has been packed with the same algorithm that PackBytes on the Apple IIGS uses. This algorithm takes the 16K graphics screen (auxiliary memory portion first) and produces a file with an indeterminate length and internal format, so no "mode byte" at offset +121 is supported as it is with other files of type $08. You can display a file of this type and auxiliary type by loading it, using UnPackBytes to decrypt the data, moving the first half into auxiliary memory at location $2000, moving the second half into main memory at location $2000, then simply toggling the display soft switches and annunciators to turn on double high-resolution mode. File type $08 was originally defined as an Apple /// FotoFile, but now it is useful for those applications that wish to save high-resolution or double high-resolution data with a file type other than $06, which is a standard binary file. If you choose to use this type, you should remember that older applications which do not check the auxiliary type may attempt to interpret these files incorrectly.