Organization: University of California, Santa Cruz
Lines: 53
NNTP-Posting-Host: ucsco.ucsc.edu
In article <1992Aug22.034635.4606@newshub.ariel.yorku.ca> cs911037@ariel.yorku.ca (CHRISTOPHER P GEORGE) writes:
>Hello everyone,
>I have encountered two strange situations.
>
>1. I just upgraded my mac LC from 4 megs to 10 megs of ram. My system used
>to take up about 1.3 megs of memory. After the upgrade, the same system takes up 3.3 megs. Are there any explanations? It seems that I have lost two megs
>of RAM.
>
This is probably a matter of setting the Mac to 32 bit mode
through the Memory control panel. If you are running the LC
in 16 bit mode, the mac can only recognize 8 MB of RAM, and
will treat the remaining 2MB as part of the System.
You haven't lost the RAM, the Mac just can't use it until
you change to 32 bit mode.
>2. I also bought a Dynatek 45 meg RMD. My internal hard drive is set
>to start up. When I want to use my computer, I turn on the main computer
>( while leaving RMD off ). The hard drive will not boot and I get a question
>mark on the screen. ( obviously it can't find a drive ). As soon as I turn on
>my RMD, the internal will boot. As well, the RMD mounts with no problem.
>Something is not right. It boots ok when the cable is disconnected
>to the RMD, but if it is connected, it must be on in order for the internal
>HD to boot. Strange isn't it?? Any ideas??
>
This is probably a matter of how your RMD is terminated. My guess is
that it uses an internal termination scheme. Some internally-terminated
SCSI devices won't seem terminated until they are turned on. This
probably has something to do with the need for the terminating resistor
in this kind of set-up needing some current to recognize its own
termination. If you start up the RMD you won't have to worry about it/
You might also be able to eliminate the problem by plugging an external
terminator into the last SCSI port in the chain.
>Sincerely,
>Chris George
>cs911037@ariel.yorku.ca
>
Hope this helps. I'm no expert, but them's mah guesses.