Re: SCSI HD IIGS: Question - How to boot both 8-bit and 16-bit software?

[cdeschu@nyx10.cs.du.edu (Chris Deschu)]

In article <CyoJs4.M0J@actrix.gen.nz>,
David Empson <dempson@atlantis.actrix.gen.nz> wrote:
>In article <Cyo50w.L7G@ssbunews.ih.att.com>,
>J. L. Walters <bird@nwsrs.nw.att.com> wrote:
>
>[Booting directly into ProDOS-8 via copied P8 file in root directory.]
>
>> Jay Krell, and others, seem to feel that what I'm doing is the wrong
>> way to go about it. They feel that I should boot GS/OS and then select
>> AppleWorks from the finder &/or Transporg (GREAT program!). I have had
>> serious problems with this procedure in the past. It seemed to me that
>> certain NDAs/CDAs didn't get the message that they were no longer
>> needed when going to 8 bit and kept running and caused me grave
>> problems in AppleWorks Classic.
>
>Which version of AppleWorks?  AppleWorks 2.0 had a strange bug: it
>tried to start up any IIgs New Desk Accessories (which aren't exactly
>useful in an 8-bit text environment).  This causes crashes in some
>cases, but can be avoided by booting ProDOS-8 directly, or by
>upgrading to AppleWorks 2.1 or later.
>
>> Finally, the procedure I've outlined above is not without problems from
>> time to time. It seems that after some number of boots of ProDOS 8,
>> enter AppleWorks, boot GS/OS, Restart to ProDOS 8,... GS/OS becomes
>> somewhat screwed up i.e., won't boot, falls into the monitor, STRANGE
>> looking menus in the Finder, etc. My guess on this subject is that
>> AppleWorks is somehow munging something that GS/OS thinks is golden on
>> boot.
>
>How are you restarting each time?  I haven't used this method for a
>while, but you would definitely have problems if you used the
>following sequence:
>
>1. Initial boot into ProDOS-8
>2. Launch the GSOS file to start up GS/OS
>3. Launch a ProDOS-8 program from GS/OS
>4. Launch the GSOS file to get back to GS/OS

	Well, I do this every day, consistently, and haven't had
any problems I could attribute to it. The only time I would
do a reboot just for p8 is with proterm, because it can't
handle the interrupts and looses characters.

>If you rebooted the computer between steps 3 and 4 (via
>Ctrl-Apple-Reset), it should be OK.  It should also be OK if you use
>"Shut Down" or "Restart" to get from GS/OS back to ProDOS-8.
>
>A possible problem is extensions which hook into low-level system
>vectors and aren't cleared by Ctrl-Apple-Reset.
>
>These can usually be removed by starting a self test
>(Ctrl-Apple-Option-Reset) then immediately rebooting.  The memory
>manager will be reinitialized, as will the RAM disk.
>-- 
>David Empson
>dempson@actrix.gen.nz
>Snail mail: P.O. Box 27-103, Wellington, New Zealand


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 |___              Chris Deschu                       cdeschu@nyx.cs.du.edu
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