A Blog About Random Computer Subjects
In previous blog posts, I showed how the GAL16V8 operated and how to program it (see here and here). In this blog post, I’m going to discuss the differences between the 16V8 and the 22V10. Here’s the specification sheet for the GAL22V10: Lattice GAL22V10 Specifications. On first inspection, both devices look identical, except for the … Read moreProgramming the GAL22V10
When I wrote my blog post about building an ALU from an EPROM, I intended to use an EPROM from my old bag of parts. Unfortunately, none of my old UV erasable PROMs worked with the programmer. I’m assuming they are old and not usable. So I purchased a pair of 28C64’s from Jameco Electronics. … Read moreBuilding an ALU From EPROM – The Circuit
In my last Vintage post I talked about the first commercially available fully assembled PCs and ended with the Space Invaders video game console. In this blog post I’m going to talk about a few other video games. Galaga I spent so many quarters on Galaga that I probably bought the company owner his/her yacht. … Read moreVintage Hardware – Arcade Games
Summary In this blog post I’m going to talk about some computers that came out in the late 70’s and early 80’s. These are some of the earliest home computers and utilized mostly 8-bit CPUs. Schematics are available and I’ve done some deep-diving into the circuitry to see how these machines were created. The first … Read moreVintage Computer Hardware Design
This blog post is a “what-if” scenario, rather than a practical application. Still, if EPROMs ever become super fast, this is a viable option. I’ve discussed Arithmetic Logic Units in previous posts. I have the circuit for the TTL 74381 and 74382 chips. The circuit is easy to find on the internet and it’s included … Read moreBuilding an ALU from an EPROM
Summary I’ve written quite a few blog posts about legacy code. In this blog post I’m going to discuss how you can deal with classic ASP, why you should deal with it sooner than later and some details of what to do. Classic ASP If you’re running a .Net shop, Classic ASP is about the … Read moreLegacy Code – Dealing with Classic ASP