In the Spirit of the Homebrew Computer Club – Building a Homebrew 8088 Computer Part 2

The 0: at the top shows the segment, which is 0x0000. On lines 2-4, the four left-most digits are the offsets. Everything to their right is memory.

Click here for the GitHub repository.

The pictures here were taken before I completed the current version. As you can see, it had a premature version number in the picture, and it doesn’t show the full screen of memory contents.

I finally got around to posting the code for MemDump, a program I wrote for my 8088 computer (back in July, last year *eye roll*) to display the contents of memory. I have used it extensively so far to see if my interrupts and interrupt vector table (IVT) are installed correctly in low memory.

I restarted my homebrew 8088 computer from scratch, and replaced the original 2 KB of SRAM with 384 KB (I left room in the memory map to add 256 more KB for a final total of 640 KB). I also wrote a firmware program to initialize the interrupt vector table, added an interrupt controller, completely redesigned the control signal demultiplexing circuitry (which both improved the efficiency and decreased the complexity), and wrote a simple demo program to display a memory dump in hexadecimal.

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Building a Homebrew 8088 Computer Part 1

A Little Background Story

Back in 2013 I wanted to learn how to build a homebrew computer, like what hackers and hobbyists did back in the 1970s during the homebrew computer craze. Although I was about 40 years late, I wanted to make a homebrew computer of my own. Sure, there are much better computers nowadays, but unless you can make circuit boards that have REALLY small solder connections, you can’t really make your own from scratch.

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SnoNite: My First Gaming Computer

See my complete build here

This blog is long overdue for an update, but I’ve been so busy with college that I’ve barely had enough time to even finish my homework, let alone work on my blog. But here I am, as the semester is winding down, and I found myself with a little spare time (on the weekend no less!). So, I figured I would share my most significant project to date.

I’ve known how to put computers and their parts together for almost 20 years now, but I’ve never built my own computer, let alone my own gaming computer, until a long time ago (in tech industry time).

Toward the end of 2015 and early 2016, I decided I wanted to get in on the new, up-and-coming VR thing, and possibly design some VR apps or games. So I knew I needed a computer that could handle it. I started ordering parts for it in January 2016, and ordered the last of my parts, the 980 Ti in March 2016.

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