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 motherboard with a VGA card and sound card. A couple of months ago I posted 80286 System Roadmap (rehsdonline.com). I feel like I have made good progress since that post.

x86 code from above videos: x86/286-related/WorkingCode/20230402 at main · rehsd/x86 (github.com)

Budgetary Bill of Materials

As of April 2023, I am estimating a BOM cost of approximately $240 USD, before shipping, and assuming low purchase volume. This does not include the Arduino Due or OLED debug screen; these would add another $65.

Nex Steps

• IDE storage

• Support for additional BIOS interrupts

• Graphical user interface

• DMA support (coded, tested)

• TCP/IP support

• At some point, get some flavor of DOS running

• Protected virtual-address mode

For more posts in my x86 series, see x86 (rehsdonline.com).