rehsd

I am researching how to add additional RAM to my 286 build. I started by thinking about a memory expansion card for my system. That has...

I now have FreeDOS running on my 286 build. In this running post, I'll add information about incremental updates I am doing. In the...

Back in January of this year, I posted a list of potential roadmap items for my 26 build. See 80286 System Roadmap (rehsdonline.com). As...

As I continue to work towards getting FreeDOS running on my 286 homebrew build, I am encountering a new issue. During boot, the FreeDOS...

I am running into an issue getting expected CPU flags register values back from interrupt calls made in FreeDOS to my BIOS on my 286...

In this post, I will share a bit about the development environment I am using to build FreeDOS (and possibly other DOS applications). I...

At this stage of my homebrew 286 system build, I have an IDE interface to a compact flash (CF) card. I have begun implementing disk...

I am currently working to see if I can boot to an IDE storage device (specifically, a CF Card) and get FreeDOS's kernel loaded. I'll use...

I am nearly six months into my 286 project. While I started on breadboards, I am now at a nice stage where I have an ATX form-factor...

I am starting to implement support for additional interrupts on my 286 system. This includes BIOS interrupts and DOS interrupts. Relevant...

Sample code at x86/Audio/20230308 at main · rehsd/x86 (github.com).

Up to this point, all code running on my 286 system has been x86 assembly (real mode). I am hoping to learn how to compile C or C++ code...

A helpful feature that I am looking to add to my 286 system is onboard flash ROM updates, where I do not need to remove the flash ROMs to...

For my sound card, I plan to leverage previous work that I did for my 65816 system build. I will refactor the sound card to support my...

My 286 system does not have built-in mouse support (yet). I have been experimenting with a few options. Back on my 6502 system, I added...

As a follow-up to VGA Next: 640x480 ISA Card, I now have a functional version of an ISA VGA card working. The card supports 640x480 with...

Last October (2022), I started my learning journey to develop a 286 system. See Start to an 80286 System. As of this writing, I have a...

One of my goals for my 286 system is to run MS-DOS at some point (ideally, 6.22). To get to that stage, I have some heavy lifting to do....

As a follow-up to Brainstorming... Video Card for 286 System, I am now working to get my VGA card working in my 80286 system. Initial...