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From: hh2@prism.gatech.EDU (HAAS)
Newsgroups: comp.sys.ibm.ps2.hardware
Subject: Re: harddrive & memory question
Message-ID: <26024@hydra.gatech.EDU>
Date: 11 Apr 91 03:24:17 GMT
References: <70155@eerie.acsu.Buffalo.EDU>
Organization: Georgia Tech Research Institute
Lines: 57

In article <70155@eerie.acsu.Buffalo.EDU> det@acsu.buffalo.edu (donald e tranquillo) writes:
>
>  I realize that this is probably something that has been covered before,
>but I have only been following this group for a few months, and don't
>remember seeing answers to these questions. If it is common knowledge,
>please reply by E-mail.

Your question #1 is probably THE MOST often asked question. I respond
by post in hopes of answering this common question for others.
PS/2 needs a FAQ!!!!!

>   1) I have a PS/2 50z, with a 30 meg harddrive. I have (of course)
>      decided that I need more room.  I was thinking about replacing the

The 50z BIOS supports the 30, 60 and 120 MB IBM ESDI controlled IDE
drives. The 50 requires an "interposer" card that replaces the T shaped
card that connects the hard drive. This "interposer" card adds BIOS
support for the larger drives. Second sources are available. CMS offers
identical drives rumored to be IBM origonal (manufactuered) equipment.
Other 2nd sources may exist.

If you have a 50, 50z or 70 (with 60MB), you may want to consider
replacing your internal drive. If you can't dump your old drive,
keep it and get a SCSI card. Add ANY drive. Other format controllers
are available, but SCSI offers the most flexability, especially with
only three available slots.

>      before). My question is what type of harddrive do I need to go with
>      my current controller (ESDI?). I've tried all kinds of diagnostic

Your controller *IS* an ESDI, but it is integrated into the Drive
Electronics. I.e. it is and IDE drive. You cannot add a 2nd disk to
this controller.

>   2) I have 1 meg RAM, is it possible to expand that on the system board
>      of a model 50z? (even if only to 2 meg?)

Open the case and look inside. IT'S EASY! If it's like the Model 70,
you'll have three RAM slots on the motherboard. Again, if like the
Model 70, these slots can take 1 or 2 Meg SIMMs in any combination.
The 25 MHz Model 70 (70A21) I think can take the 4 MB SIMMs ( ?? )

>- Donald Tranquillo                                     det@acsu.buffalo.edu

Good luck . . . .

hh
---
Harry Haas  GTRI/RIDL/EB    |    Georgia Tech Research Institute
Research Engineer II        |    Georgia Institute of Technology
404-528-7679                |    Atlanta Georgia, 30332
hh2@prism.gatech.edu        |    "What makes it DO that?!" - Bones
-- 
  Harry Haas  GTRI/RIDL/DB     "What makes it DO that!?" - Bones 
  Georgia Institute of Technology,        Atlanta Georgia, 30332
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