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6.1.12 Apple Program Files (.PROG)
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This article is from the Apple ][ Emulator Resources Guide, by Alex Maddison with numerous contributions by others.
6.1.12 Apple Program Files (.PROG)
Unlike disk-images, which simulate the structure of an Apple disk, some emulators are capable of running Apple software without the disk-image itself. The "Apple 2000" emulator on the Amiga does this with single executable files (so software with multiple data files will not work). Filenames with a *.PROG suffix become executable files; these are single files that were runnable from Apple DOS 3.3/ProDOS and did not require any disk access thereafter. These files now do not even require booting any Apple disk and are simply loaded into the appropriate Apple memory areas and instantly started. Alternatively, the Linux "ProDOS Emulator" uses a directory on the Unix system as a simulated drive (Slot 7, Drive 1) - thus eliminating the need for disk-images. With the ProDOS files (such as BASIC.SYSTEM or SHRINKIT) in the same directory as the emulator; the current directory appears within the emulator as a disk named /UNIX at S7,D1.
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