For the nostalgia, I'm going through Apple Pascal - A Hands-on Approach using AppleWin.

There are four disks, pascal0 through pascal3, and for some reason pascal0 is missing a file called SYSTEM.PASCAL. It's present onpascal1, however.

I thought I could boot a normal DOS disk, load SYSTEM.PASCAL from pascal1, and save it on pascal0, but when I try to catalog the pascal1 disk it produces gibberish and beeps.

So how do I copy SYSTEM.PASCAL from one disk to another? AppleWin has a two-disk-drive configuration.

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    If I remember correctly, Apple Pascal is an entirely different operating system from DOS, including different on-disk file formats. So it won't be possible to use DOS utilities to copy files, as you found. Mar 13, 2019 at 0:24
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    Since you're using AppleWin, on Windows the easiest way would be to use a Windows-based Apple II disk utility like CiderPress instead of doing it inside the emulator. I don't know the Apple Pascal environment well enough to help do this inside the emulator off the top of my head without some research. Mar 13, 2019 at 3:02
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    There is a disk utility somewhere that you can use to copy files; I'd have to fire up an emulator myself to remember the details. But you don't need to copy SYSTEM.PASCAL; the whole system is set up so you can have one of the disks (pascal1 or pascal2, don't remember) in the left drive, and your work disk in the right drive. From time to time you may need to switch disks to access rarely used stuff.
    – dirkt
    Mar 13, 2019 at 6:47
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    I started up archive.org/details/UCSD_Pascal_1.1_1, and copying files is done with T(ransfer in F(ile, IIRC. Archive doesn't seem to support a second disk, so I can't test.
    – dirkt
    Mar 13, 2019 at 6:51
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    See the reference manual, page 34.
    – dirkt
    Mar 13, 2019 at 6:56

1 Answer 1


You should download and use CiderPress which is a Swiss Army Knife tool for Apple disk images - It understands and supports the UCSD Pascal file system format and should be able to transfer a file from one disk image to the other.

  • As @dirkt noted, Apple Pascal was generally run on a two-drive system. You'd boot APPLE1: and run the asm/compiler/linker from APPLE2:. IIRC APPLE0: was intended for a one-drive system, and looking at disk listings it should have SYSTEM.PASCAL on it. FWIW, Pascal v1.3 supports installation on a 3.5" disk and uses 128KB of RAM when available, which makes life easier.
    – fadden
    Mar 14, 2019 at 15:11

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