Clik here to view.
ZX Spectrum ROM mods
In this blog, I will show you how to interface an Atari-style joystick to the Altera DE1 FPGA board running a Spectrum implementation, how to change the ROM to enable you to input some game-cheat...
View ArticleDevelopment PC Setup
This blog post describes the various tools that I use for both work and hobby projects, on my development PC. Most people already have their own go-to tools installed on each computer they use for...
View ArticleClik here to view.
Z80 Explorer
Z80 Explorer is a Zilog Z80 netlist-level simulator capable of running Z80 machine code and also an educational tool with features that help reverse engineer and understand this chip better. Z80...
View ArticleClik here to view.
A Calculator
The idea for this project came about during a week of freezing winter arctic events here in Austin, Texas, with a failed power grid (as well as the Texas government), while keeping close to a gas...
View ArticleClik here to view.
A Calculator (2): Basic Four Functions
This is the second article in a series on making our calculator. This article is about prototyping and the verification of fundamental algorithms. We need to investigate and pick algorithms we will...
View ArticleClik here to view.
A Calculator (3): Practical Numerical Methods
In the last post, we verified and quantified the precision of the basic four functions (addition, subtraction, multiplication, and division). Now, we can use them as a stepping stone for more complex...
View ArticleClik here to view.
A Calculator (4): The Framework
For as long as I remember, I had played with LEGOs. Those simple blocks would transform into complex objects whose final shapes only existed in the supple thoughts of creative imagination. The kind of...
View ArticleClik here to view.
A Calculator – Completed!
It has been a while since I wrote the last post on this project. In the meantime, I could dedicate all my limited free time to work on the implementation. It took a long time, but I did make...
View ArticleClik here to view.
Z80 Explorer v1.06 released
Z80 Explorer is a visual netlist-level simulator for the Zilog Z80 microprocessor. You can read more about it in my main blog article. This release adds some features and improvements I felt were...
View ArticleClik here to view.
Porting a Qt Project to WebAssembly: Challenges and Solutions
In this post, I describe porting a small application, a calculator called SpeedCrunch, to WebAssembly and some common issues that need to be addressed. I hope you may find some solutions helpful and...
View Article