ChibiAkumas ASM Programming Forum

The more I research (translated as: watch YouTube videos), I'm realizing validating checksums is a difficult concept. But, it's somewhat easy to implement in hardware. If anyone is interested, check out Ben Eater's YouTube videos. The 10,000 foot (or 3,000 meter view, depending where you are in the ...

In my previous posts, I had mentioned editing Grid laptop BIOS code. This code is stored in 2 EPROMS on the motherboard. 1 EPROM is the low byte, and the other EPROM is the high byte. I use WinHex to merge or split the file as needed. Each BIOS chip has a checksum. If the checksum does not match, th...

All, If you haven't read my previous post about "why I'm here", reading it will provide context to this post. :) In this BIOS code snippet, the '286 processor is looking for any 1 of 5 Connor Peripherals hard drives starting at $76da. There are annotations, but I was hoping to gain some mo...

Hello, my name is Shawn. I got interested in ASM programming because of some specialized rugged '286 laptops. They were made by a company called Grid. They made several models based around the 8086 (GridLite series), '286 (the 1520), '386SX (the 1550), and full '386 (the 1535). Then Tandy bought the...