This post is the beginning of the description of the main BASIC syntax parsing loop. For context and a list of other posts on this topic,...

In this post I'll be looking at the displaying and handling of the long-form menu options, the memory and tape reader configuration,...

I had originally planned to write one post explaining what happens from the time BASIC is loaded and starts executing to the time the...

I was in the middle of writing a post about the analysis of the BASIC startup code, but it was getting massive, and I'm actually going to...

This is the second in my series of posts reverse-engineering the PDP-11 BASIC code. In this instalment I'll be breaking down a few more...

Hopefully you're here for some bare metal PDP-11 stuff, but just in case: If you want to load and use PDP-11 BASIC, look here. If you...

I have been taking a look at the PDP-11 BASIC code and I thought it might be interesting to see if I could figure out how it works. I...

I was in the middle of a disassembly project (more on that in future posts!) but I encountered this discrete issue and I thought it would...

After extensively studying the process of loading programs from paper tape in my previous series of posts, I thought it might be fun to...

This is the fourth part in a series on loading a program from paper tape. To understand what's going on, I recommend you read Part 1,...

This post describes the process by which the bootstrap loader loads the absolute loader. It is part of a series of posts, so it won't...

This post is a deep-dive on the PDP-11 bootstrap loader. It is a follow on from Part 1 of this series on loading a program from tape,...

I thought it might be fun to figure out how to load a program from paper tape. This exercise actually revealed a lot of very interesting...

I found a really useful series of videos on youtube and I want to include links to them here for anyone who is interested. As far as I...

While I'm on the general topic of timing and clocks, there is a second clock type that was available for the PDP-11 called the...

As I was developing the code for the PDP-11 Line Clock post yesterday, I ran into an issue where the interrupt servicing wasn't working...

The line clock allows time-based behaviour to be implemented. Here is a walkthrough of a sample application that uses the line clock....

This is the second part of the project to develop the simplest possible program on PDP11. In a previous post I created a program to...

When you setup the a Raspberry Pi as part of a PiDP-11 kit, it boots by default into a test blinkenlights application that makes the...

The aim of this blog is to record my experience experimenting with the PDP11. This project started when I got a PiDP11 kit, so my...