What is the p-Machine, and why is it like that?

Before we can go into greater detail about what the code in our example (and other programs) actually does, we're going to need a little background on what the p-Machine architecture is, and why it has some of the features that it has...

http://markbessey.blog/2025/05/20/ucsd-pascal-in-depth-the-p-machine/

UCSD Pascal In Depth: Code files

Unlike text files, the code file format is well described in the Apple Pascal Operating System Reference manual. So decoding a code file should be really simple, right? Let's take a very simple "Hello World" program…

http://markbessey.blog/2025/05/18/ucsd-pascal-in-depth-code-files/
#retrocomputing #apple #pascal #psystem

UCSD Pascal: In Depth 3/n

Part 3 - File Formats (text)

What kind of system has a "file format" for text? If you've only worked on modern systems, the idea that a "text file" would be anything other than a bunch of unorganized bytes is probably pretty foreign....

http://markbessey.blog/2025/05/08/ucsd-pascal-in-depth-3-n/
#pascal #retrocomputing #psystem

Oh look - it's a new blog post, an introduction to the USCD p-System Editor, *written on* the UCSD Pascal Editor:
https://markbessey.blog/2025/04/29/ucsd-pascal-in-depth/

Yes, this means that my #Rust #psystem utility can successfully copy files off of the emulator disk image, and convert them into Mac-formatted text, from the frankly bizarre format that's native to the text editor.