176 lines
4.6 KiB
Plaintext
176 lines
4.6 KiB
Plaintext
From netboot-owner@baghira.han.de Thu Sep 16 12:08:44 1999
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15 Sep 99 13:10:25 +0100
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id 11RCxI-0000oT-00; Wed, 15 Sep 1999 13:10:28 +0200
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Date: Wed, 15 Sep 1999 13:10:28 +0200 (CEST)
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From: Petr Olivka <Petr.Olivka@vsb.cz>
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To: netboot@baghira.han.de
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Subject: netboot image on hard disk - it is easy
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In-Reply-To: <37DF4BD4.E8FFF8FC@gsmbox.com>
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Message-ID: <Pine.LNX.4.10.9909151247430.2936-100000@pcd403z.vsb.cz>
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MIME-Version: 1.0
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Content-Type: TEXT/PLAIN; charset=US-ASCII
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Sender: owner-netboot@baghira.han.de
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Precedence: bulk
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Reply-To: netboot@baghira.han.de
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X-Moderator: netboot-owner@baghira.han.de
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It is good joke, at this moment I have only simple version of MBR to load
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image from HD, but only from track 0. HD have to have enough sectors per
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track for rom image.
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And small program in turbo-pascal to download image to HD.
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below is assembler code for MBR. Is writen for tasm and tlink.
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If you have 512 bytes binary file with MBR code, then concat it with
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rom-image and download to hda. BUT NOT DIRECTLY !!!! You have to copy
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partition table ( and NT signature ) to MBR and then download. BUT ONLY tO
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TRACK 0.
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Everything in your own risk.
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If I will have some free time, I will write some code directly to netboot.
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poli
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.model large, pascal
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.code
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.386
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public mbrasm, mbrend
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ROMLOAD equ 5000h
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org 600h
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mbrasm proc
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cli
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xor ax, ax
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mov ss, ax
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mov sp, 7C00h
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mov si, sp
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mov es, ax
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mov ds, ax
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sti
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cld
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mov di, 600h
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mov cx, 100h
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rep movsw
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db 0EAh
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dw offset @@jump
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dw 0
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@@jump:
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mov si, offset Hlaska
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call @@print
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; rozmery prvniho HD
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mov ah, 8
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mov dl, 80h
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int 13h
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jc @@chyba
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; dh - H, cx - CS
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; prvi stopa obsahuje bootrom, tak ji natahneme do RAM
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mov ah, 2
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mov al, cl
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and al, 3Fh
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dec al
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mov dx, 80h
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mov cx, 2
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mov bx, ROMLOAD
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mov es, bx
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xor bx, bx
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int 13h
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jc @@chyba
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; hromada kodu podle zdrojaku netboot
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xor di, di
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mov es, di
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mov di, 380h
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push di
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mov cx, 10
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cld
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rep stosw
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pop di
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mov word ptr [ di ], 5a5ah
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mov byte ptr [ di + 2 ], 50h
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mov word ptr [ di + 10h ], 0FFFFh
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mov word ptr [ di + 12h ], 0FFFFh
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; navratova adresa, kdyby nezabrala ROM
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mov OfsErr, offset RomErr
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push cs
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push offset @@chyba
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mov ax, ROMLOAD
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mov es, ax
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push es
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; kouzelny jump....
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mov si, es:[ 1ah ]
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push word ptr es:[ si + 1ah ] ; ...do bootrom v RAM
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retf
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@@chyba:
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mov si, OfsErr
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call @@print
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mov si, offset CRLF
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call @@print
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jmp @@chyba
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@@print:
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lodsb
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cmp al,0
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je @@navrat
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push si
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mov bx,7
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mov ah,0Eh
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int 10h
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pop si
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jmp @@print
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@@navrat:
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retn
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Hlaska db 13, 10, 'HD Net Loader v1.0 (c) poli 1999', 13, 10, 0
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CRLF db 13, 10, 0
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OfsErr dw offset Error
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Error db 'Error load from HD !', 0
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RomErr db 'ROM Error !', 0
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mbrasm endp
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mbrend proc
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ret
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mbrend endp
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org 800h - 2
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dw 0AA55h
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end
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===========================================================================
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This Mail was sent to netboot mailing list by:
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Petr Olivka <Petr.Olivka@vsb.cz>
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To get help about this list, send a mail with 'help' as the only string in
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send a mail to netboot-owner@baghira.han.de.
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