optromloader
x86-bootloader
| optromloader | x86-bootloader | |
|---|---|---|
| 8 | 1 | |
| 47 | 24 | |
| - | - | |
| 0.0 | 0.0 | |
| over 2 years ago | over 1 year ago | |
| Assembly | Assembly | |
| MIT License | GNU General Public License v3.0 only |
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optromloader
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Understanding the x86's Decimal Adjust after Addition (DAA) instruction
I have used DAA recently, in my "load option ROM in RAM floppy tool"[0]. Specifically, I use it for printing numbers as hexadecimal[1], as unfortunately the ASCII standard is not arranged in a way as to facilitate this.
0. https://github.com/rvalles/optromloader/
1. https://github.com/rvalles/optromloader/blob/master/optromlo...
- Optromloader: 8086 floppy-loading of option ROMs
- Optromloader: IBM PC/Clone 8086 floppy-loading of option ROMs
- rvalles/optromloader: IBM PC/Clone 8086+ floppy-loading of option roms.
x86-bootloader
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Just got my bootloader and real mode kernel working on 80s hardware!
I recently got my hands on a IBM PC Convertible (model 5140), rocking an Intel 8088 CPU and 256KB of RAM! I had to get my bootloader and kernel running on this thing, and after a few weeks of fixing up bugs its finally working!!! For those interested on the source code: FAT12/16 Bootloader (github.com) SuccOS: A hobby Operating System (github.com)
What are some alternatives?
IBM-PC-BIOS - This is a reconstruction of the original 1981-82 IBM PC BIOS source code using scanning and transcription of the BIOS listings found in the IBM Technical Reference manuals.
FutureDOS - A futuristic DOS
unzx0_x86 - Free, zlib licensed ZX0 decompressor for the x86
sjasmplus - Command-line cross-compiler of assembly language for Z80 CPU.
floppybird - Floppy Bird (OS)
BTAG - The Better Than Awful GRUB bootloader
bfloader - 🧠Brainfuck IDE and interpreter in 512 bytes. (boot sector)
Cyjon - A simple, clean code, multi-tasking kernel written in pure Assembly language for 64-bit processors from the AMD64 family.
zsnes - A maintained fork of ZSNES, a Super Nintendo emulator. The original project needs patches to build and is not maintained anymore: https://sourceforge.net/projects/zsnes/
Zero - 64 bit bootloader for Cyjon operating system.
Modernish-etch-a-sketch - A take on the classic game etch a sketch using tasm, dosbox, Arduino and a bit of 3d modeling.
btry - Monoplatform battery info program written in unportable x86 assembly