New blog and a call for beta-testing
Dear EndBASIC enthusiasts!
In preparation for the imminent 0.11 release, which needs some beta-testing right now, I have created a brand-new “blog” section in the EndBASIC website.
July 5, 2024 · Continue reading (about 2 minutes)
Porting the EndBASIC console to an LCD
Hello again Blog System/5 and sorry for the radio silence for the last couple of months. I had been writing too much in here and neglecting my side projects so I needed to get back to them. And now that I’ve made significant progress on cool new features for EndBASIC, it’s time to write about them a little!
One of the defining characteristics of EndBASIC is its hybrid console: what looks like a simple text terminal at first glance can actually render overlapping graphics and text at the same time. This is a feature that I believe is critical to simplify learning and it first appeared with the 0.8 release back in 2021.
April 26, 2024 · Continue reading (about 16 minutes)
BASIC parsing difficulties in EndBASIC
The original BASIC parser in EndBASIC 0.1 was very rudimentary and it stayed pretty much unmodified until the 0.10 release last month. This release brought major changes to the parser to support new features, but it wasn’t easy to implement them. In this post, I want to look into various difficulties that arose implementing certain BASIC constructs in EndBASIC. Overcoming these difficulties was difficult, but it was also fascinating because it gave me a glimpse of the design choices that the original BASIC designers must have faced. Capturing these ah-ha moments in a post is also tricky, but I’ll try anyway.
January 13, 2023 · Continue reading (about 14 minutes)
EndBASIC 0.10: Core language, evolved
After three months of early-morning hacking, I’m pleased to announce that EndBASIC 0.10 is now available—right on time for some holiday-time experimentation!
This release marks a huge milestone because it makes the language usable for real-world development.
You see, when I started this project over two years ago, I wrote a rudimentary interpreter for something that resembled BASIC and then launched EndBASIC 0.1. Since then, I have been piling onto those insufficient foundations by adding flashy features such as a web interface, a cloud file sharing service, and a hybrid text/graphics console. These features have been well-received in every demo I’ve given but… the feedback that always came back was the same: “Give me some sort of functions or subroutines!”, or “This is no BASIC without GOTO!”.
And these criticisms were right. Trying to write any sort of non-trivial program in EndBASIC was a daunting and frustrating experience. I had tried to simplify coding to the foundations of structured programming, but without a way to perform unstructured jumps (aka go-tos) or define custom functions… it was impossible to factor out common code, which is a need for the vast majority of programs that exceed a screenful of text. There were also usability deficits such as the lack of line numbers in error messages, which made it incredibly difficult to debug any failing program.
The situation had to change, and change it has in EndBASIC 0.10.
December 27, 2022 · Continue reading (about 5 minutes)
From AST to bytecode execution in EndBASIC
Since its inception two years ago, the EndBASIC interpreter has been using an AST-based execution
engine. And during all this time, people have mocked the language for not allowing 10 GOTO 10.
Well, fear not: the upcoming 0.10 release has full support for GOTO and GOSUB, features that
were made possible by moving to a bytecode-based interpreter. Let’s take a peek at what the
problems were and how I addressed them.
November 22, 2022 · Continue reading (about 8 minutes)
