Article View: comp.sys.atari.st
Article #1856Re: AHDI (Was: GDOS, AHDI, FONTWID?)
From: Daniel Deimert
Date: Fri, 16 Jun 1989 16:32
Date: Fri, 16 Jun 1989 16:32
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2267 bytes
In article <631@lzaz.ATT.COM> hcj@lzaz.ATT.COM (HC Johnson) writes:
>> >AHDI (generic) is not a mystical program.
>> >It is a Terminate-Stay-Resident program that when loaded does
>>
>> Is it just a normal program too, or is it some kind of IMG-file? How
>
>HDB from Atari, and GEMBOOT (public domain) put sufficient code in sector 0
>of the hard disk to load the driver from the boot disk. HDB renames ahdi.prg
>to be driver.sys just to make this look mysterious.
I have no HDB. The program I've got on my "SH boot disk" is called
HINSTALL. There are two datafiles as well, 204ROOT.IMG and 204BOOT.IMG.
I assume these are being copied on the bootblock? They are both of
sector-lenght (512 bytes). -BOOT- probably fits into the bootblock (seems
logical to me :-) but where is -ROOT- copied to?
The SYS-file on the harddisk is named "SH204DVR.SYS".
It is then possible for me to replace the .SYS-file with my own driver then?
It might maybe even do the trick with loading the TOS image-files?
Maybe one could do a boot-block which loads in, lets say about 10 sectors
of data. These sectors contains code to load the TOS and the AHDI. Maybe
even a resident virusdetector or something similar?
A small problem: How do I load the TOS? Does it have to be loaded
BEFORE the AHDI and/or other code or can I just load it & start it?
[ I can jump right into the TOS-start adress, can't I? Allan?! ]
Why not load the driver directly in the boot-block? Any reason, besides
it is to big? :-)
Daniel Deimert / / Internet: daniel@pkmab.se
Fridstav. 4 / / UUCP: ...{uunet,mcvax}!sunic.sunet.se!
S-715 94 Odensbacken / / kullmar!pkmab!daniel
SWEDEN / / Phone: +46-19-52037, +46-19-111441 (BBS)
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<1276@pkmab.se>Path:
arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!sun-barr!ames!hc!lll-winken!uunet!mcvax!kth!sunic!kullmar!pkmab!danielReferences:
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!sun-barr!ames!hc!lll-winken!uunet!mcvax!kth!sunic!kullmar!pkmab!daniel From: daniel@pkmab.se (Daniel Deimert) Newsgroups: comp.sys.atari.st Subject: Re: AHDI (Was: GDOS, AHDI, FONTWID?) Keywords: ahdi, harddisks, boot Message-ID: <1276@pkmab.se> Date: 16 Jun 89 16:32:56 GMT References: <18600014@uxh.cso.uiuc.edu> <1543@atari.UUCP> <1257@pkmab.se> <1268@pkmab.se> <631@lzaz.ATT.COM> Organization: \"Orebros Tech. College, Sweden Lines: 33