🚀 go-pugleaf

RetroBBS NetNews Server

Inspired by RockSolid Light RIP Retro Guy

Thread View: comp.protocols.ibm
1 messages
1 total messages Started by cs354- Broward Horne Wed, 22 May 1991 23:30
Re: hard disk write protect
#1018
Author: cs354- Broward Horne
Date: Wed, 22 May 1991 23:30
38 lines
2403 bytes
In article <9105201340.AA10238@lilac.berkeley.edu> BITNIC IBM-NETS List
        <IBM-NETS%BITNIC.BITNET@lilac.berkeley.edu> writes:
>
>The reason I was asking without giving any specifics, is that before
>having to go out and getting documents to do the thing, I was wondering
>if there wasn't any system on which it would be easy to do without having
>to get the doc.
>
>For example, because I havn't taken the time to look it up, is there any
>standard on an IDE, SCSI or an AT type controller card for PC's? Does a
>MAC have any signal that's standard on it? Etc...
>
>OR... do I really have to do it on the schematic level of a Hard Disk,
>and there's no way to do it from the controller level?
>
>P.S. Once again, is there a list I can subscribe to that would be a bit
>more suited to this type of question?

          A good place to try might be the Virus newsgroup ( comp.virus,
     I believe ). I couldn't help but notice your system looks like it's
     an Autocad lab or some such. I originally wanted to write-protect
     the hard disks for our Acad lab, but it finally proved to be unfeasible.

     For instance, how about temporary file saves?  To do them to a temp
    directory, or to a user's floppy disk, makes a WORLD of difference to
    the users.  Just takes too much time.

        There should be a READ/WRITE line to the hard disk, if you can
    get the schematic. Don't forget to tie the end still connected to
    the drive to either a high or low, depending on which means READ/WRITE.
    A lot of logic chips don't respect a hanging wire as being LOW.


--
Broward Horne                  Distant lands are not so far away,
horne@sapphire.idbsu.edu       I don't know why *you* don't go.
an030@cleveland.freenet.cwru   Take my hands, I'll show you the way.
                               Pack your bags, and.... sail away. :)
Thread Navigation

This is a paginated view of messages in the thread with full content displayed inline.

Messages are displayed in chronological order, with the original post highlighted in green.

Use pagination controls to navigate through all messages in large threads.

Back to All Threads