efer o.s.

[kflavour]

efer is pure and simple operating system for x86-32 computers, writed on flat assembler.

implemented following commands:

Code: Select all

i    - this inf screen
d    - display memory dump
x    - power off or reset
e    - edit memory
m    - move memory
c    - call (code execution at a given address)
r    - read from drive
w    - write on drive

some features:
working in 32-bit protected mode with 4Gb memory limit.
image kernel.bin (core, loader, and shell) - ~5 Kb
possibility of booting from floppy, CD-ROM, hdd - options defined in boot.asm
drive i/o - through ebios int 13/4X with jump to real mode

Sucessfully tested on Cel1700/VIA VT8233A and VMWare Workstation ACE 6.0.2

But on Ath64 3800+/GA-K8NMF-9 nForce4 (not under vm) at executing x, r, w commands system hangs, if anyone knows why - please write.

in attached efer.zip - full source code and boot image for floppy, in \rdw subdir - program for writing on drive or image (also with source)

[xyjamepa]

Interesting os

[AndrewAPrice]

efer is pure and simple [snip]

Silly me, I was trying to click on "efer" before realising it wasn't a link to your homepage.

I like the idea The single character instruction and low-levelness (not many shells allow you to jump to a location in memory ) makes it feel like barebone interpreter for an esoteric language.