Interrupts and More Interrupts
I am starting to implement support for additional interrupts on my 286 system. This includes BIOS interrupts and DOS interrupts. Relevant...
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rehsd
- Feb 24
- 5 min
Using C/C++ with my 286
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...
102 views3 comments
rehsd
- Feb 20
- 2 min
286: Onboard ROM Updates
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...
51 views0 comments
rehsd
- Feb 17
- 1 min
Sound Card for my 286 System
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...
1,834 views0 comments
rehsd
- Feb 15
- 2 min
Mouse for my 80286 System (SPI to PS/2)
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...
14 views0 comments
rehsd
- Jan 25
- 3 min
80286 System Roadmap
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...
98 views3 comments
rehsd
- Dec 31
- 3 min
VGA Next: 640x480 ISA Card
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....
364 views5 comments
rehsd
- Dec 18, 2022
- 3 min
VGA for my 80286
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...
190 views0 comments
rehsd
- Dec 13, 2022
- 2 min
Transitioning 80286 from Breadboard to PCB
Over the past couple of months, I have been working to build out a breadboard-based 80286 system. See /blog/categories/x86. I plan to...
188 views0 comments
rehsd
- Dec 8, 2022
- 1 min
80286 Build #2 (Intel Basic System Configuration), Part 4
This is part four of my blog posts on my 286 basic system build. At this stage, PS/2 keyboard input, interrupts, and LCD output are...
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rehsd
- Nov 24, 2022
- 1 min
286, SPI, and a 6522 VIA
I recently added basic SPI support to my 80286 system with the help of a W65C22S Versatile Interface Adapter (VIA). Additional Reading...
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rehsd
- Nov 20, 2022
- 4 min
Brainstorming... Video Card for 286 System
I am researching options for a video card for my 80286 system. I will update this page as I learn more. Related: VGA Add-in Card for My...
160 views2 comments
rehsd
- Nov 16, 2022
- 1 min
80286 Build #2 (Intel Basic System Configuration), Part 3
This is part three of my blog posts on my 286 basic system build. At this stage, PS/2 keyboard input, interrupts, and LCD output are...
66 views0 comments
rehsd
- Nov 14, 2022
- 4 min
Working on Interrupts
Current Status: RESOLVED I am currently working to get interrupts running on my 286 system. I am starting with a simple low-to-high...
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rehsd
- Nov 6, 2022
- 1 min
80286 Build #2 (Intel Basic System Configuration), Part 2
Continued from 80286 Build #2 (Intel Basic System Configuration)... Initial PCBs Ordered I ordered a set of PCBs to see if I can get the...
140 views4 comments
rehsd
- Oct 22, 2022
- 2 min
80286 Build #2 (Intel Basic System Configuration)
I am starting plans for build #2 of a '286 breadboard-based system. With this build, I hope to implement the full "basic system...
120 views0 comments
rehsd
- Oct 18, 2022
- 4 min
Driving a 1602 LCD with a 286 Processor!
I have been working on a breadboard-based 80286 system. Recently, I made it to a nice milestone -- I can now drive a 1602 LCD! This is a...
103 views0 comments
rehsd
- Oct 16, 2022
- 1 min
80286 Resources
As I come across resources that I find helpful in my '286 build, I will share them here. If you have suggested additions, please drop me...
80 views4 comments
rehsd
- Oct 10, 2022
- 3 min
Start to an 80286 System
I am spinning up a new project -- a breadboard-based 80286. I have not worked with x86 processors from a design perspective before. The...
480 views2 comments
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