Hi!
I first heard about Flat ASM when I saw MenuetOS.
I have created some programs in FASM.
Now I want to create an Operating System.
I want a tutorial about this problem.

How do i create a boot diskette?

Please help me!


Thanks!

simpaticool86@yahoo.com

Hi,

When the computer starts it attempts to read the first sector on a floppy.
If the first sector contains the 0x55AA hexa signature at byte 510, THEN the BIOS assumes that this diskette is bootable and it will load the first sector at address 7C00 (either 7C0:0000 or 0000:7C00) and it will jump to it ...

From here on you are on your own.

Until you get into protected mode you could still use help from the BIOS interupts. After you setup protected mode you will have to talk directly with each hardware.

There is scarse documentation about hardware, some is ok, some incomplete, some missleading and some wrong... you will have to know

There are a lot of boot sectors samples on the net and quite a few web sites that deal with making your own OS Alexei Frounze and others have some step by step tutorials .

If you have had problems finding this info using Google --. then my friend you are in big troubles because doing your own OS is not an easy ride and "Google skilz" are the lowest thing needed

BTW I am Romanian also

And i have made my own OS; so ask me decent questions and i will answer them.

check out the tutorials at: http://www.osdever.net/

Thanks for helping me!
I'm glad that I'm not the only one who wants to create an OS
and that you really care about me
Please privide me more information and, if you agree,
some source code of your own OS (in FASM)

BTW, if you are a Romanian, please talk with me in our language

I prefer to talk in English as the world needs a single language and the official language of this board is English we can talk in Romainan via email if you feel the need.

Using Romanian here is pointless since no other guys would understand and it will just spam the board. You must understand that a message board is NOT for your own viewing pleasure but for others to read and understand also ...

You can contact me by email at:
bogdanontanu at yahoo dot com

The source code of my OS is freely available under the GPL licence here:
http://www.hostileencounter.com/os_main.html
in the downloads section, you can see screenshots also.

However i use TASM as my assembler as i like it better, so i have no version of my OS in FASM.

AFAIK pelailo works on translating it to FASM but i am unaware of his status or agenda


BTW to your surprise wanting to make his own OS is IMHO the most popular sport in the world today!

Well, after thinking that you are Napoleon Bonaparte or Jesus Christ or GOD himself... so it is by no way a singular or original or easy attempt

As Randy pointed out most personal OSes finish up a little bit after the boot sector plus enabling multitasking and paging.

Toate cele bune

My OS (RetroForth/Native) can be downloaded at http://www.retroforth.org/release/ It's not very big (less than 2,000 lines of assembly at last count), but provides a boot sector, drivers for keyboard, text screen, serial port, parallel port, hard drive, and a complete Forth compiler/interpreter in that space. I'm working on USB support and cooperative multitasking, but that work is still in the early stages.

you can get my source at: http://bos.asmhackers.net/

Thanks!
I have created a boot diskette.
The computer boots and then it prints:
" Welcome! Press any key to rebot ..."

It's very simple, but I'm very happy.
Now I'm going to create something like MS-DOS.

Thanks for your source codes and congratulations.
I hope one day I'll present you my OS.


BTW, I really like BIOS INTs

don't get to used to it if you plan to go 32-bit.

bubach, what do u mean?
I can't use bios int in 32b mode?
Then how do i create an 32-bit OS?

btw ... please help me with some stuff:
1. mkdir, rmdir, and other stuff (FAT12)
2. ramdisk (like in MenuetOS)
3. !!! How do I load the kernel?
I have created the 512 bytes bootloader
This must load the kernel wich contains the commands and functions.
But how do i execute it? I know how to read from disk but I don't know
where (memory location) do I have tu put it and how to execute it. Thanks!


U are the greatest!
Thanks again!

Please help me!
Hello!
Am I dead?
PLEASE!

No, you cannot call 16-bit code in 32-bit mode. If you have to you can go back to 16-bit, make the call, and enter 32-bit again. But that is ugly.
For I/O in 32-bit you have to use the I/O ports directly..


First of all calm down, you sound like me when i was new to OS-dev...
Here's my tip for you to begin with:

Start by making a simple bootsector that simply load a couple of secors after the bootsector (don't care about the filsesystem yet), and maybe enter pmode in the bootsector aswell.

Good tutorials for this can be found at:
http://www.osdever.net/tutorials.php?cat=4&sort=1
(gregor brunmar and xosdev)

When you have the kernel loaded, start out by writing a couple of screen functions to scroll, print and move cursor.

That should keep you busy for the next couple of months or so..

/ Christoffer

ok

OT & PS: PM me with the password you want..

ok