problem with bootloader

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DC740

Joined: 01 Oct 2004
Posts: 74
Location: Argentina

DC740 08 Jan 2006, 18:37

I've been trying to find a bootloader that reads the kernel from the fat12 filesystem in the diskette, but i can't find any that work with an 286 machine

for example, i tryied GRUB and it just hangs... i tryed the same diskette on my amd and it works fine... but in my 286 it says "GRUB" and then it hangs... after that i tryied about 4 or maybe 5 different bootloaders and none of then work... they all hangs the computer without error message... and of course I've been tryin with the attached examples of each bootloader, not my own code... and i also tried mixing the kernel examples (cause there were VESA examples and 32 bit examples that wouldn't boot on my 286)

the bootloaders were not able to load anything... not even the simplest kernel that showed a text on the screen only...

and the problem is not on the machine cause i'm running win 3.1 without problems and also i tried Metro Operative system(posted in this forum) and it booted ok...

so can anyone tell me about a simple bootloader that WORKS Crying or Very sad

thanks for your time

08 Jan 2006, 18:37

Dex4u

Joined: 08 Feb 2005
Posts: 1601
Location: web

Dex4u 08 Jan 2006, 19:18

Have you tryed "bootprog" it will load a com or mz exe or bin file from a fat12 formated floppy.
You can get it here: http://alexfru.chat.ru/epm.html#bootprog

PS: I have a 286 laptop, most things will not work as the video seg=B000h, may be this is your problem

Try this, just as a test:

Code:

;************************************; \\|//; (@ @); ASHLEY4.; Put vesatest.bin on boot sector; with rawrite.; Assemble with fasm; c:\fasm test.asm test.bin;;************************************org 0x7C00use16;****************************; Realmode startup code.;****************************start:        xor   ax,ax        mov   ds,ax        mov   es,ax        mov   ss,ax        mov   sp,0x7C00        mov   ax,0xB000        mov   es,ax        lea   si,[msg0]                           mov   di,(80 * 1 + 2) * 2        mov   cx,52        cld        rep   movsb        jmp   $  ;*************************************; Data.;*************************************color       dd 0 msg0        db "  V E S A   M O D E   N O T   S U P P O R T E D !   " ;*************************************; Make program 510 byte's + 0xaa55;*************************************times 510- ($-start)  db 0  dw 0xaa55

NOTE: The spacers in the letters are needed.

08 Jan 2006, 19:18

DC740

Joined: 01 Oct 2004
Posts: 74
Location: Argentina

DC740 08 Jan 2006, 23:10

nop, it doesn't work, but thank you for your link, this bootloader works!! Smile

i was losing my hopes on the 286 hehehe

thanx a lot!

08 Jan 2006, 23:10

Dex4u

Joined: 08 Feb 2005
Posts: 1601
Location: web

Dex4u 09 Jan 2006, 02:04

Your welcome, One out of two ain't bad, that all most a meatloaf song Laughing

09 Jan 2006, 02:04

RedGhost

Joined: 18 May 2005
Posts: 443
Location: BC, Canada

RedGhost 09 Jan 2006, 02:20

Dex4u wrote:

Your welcome, One out of two ain't bad, that all most a meatloaf song .

haha i happen to be listening to the album "bat out of hell" Very Happy

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redghost.ca

09 Jan 2006, 02:20

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