NetNews Usenet Archive 1992 #20/NN_1992_20.iso/spool/comp/sys/apple2/20128

Internet Message Format | 1992-09-10 | 1.7 KB

Path: sparky!uunet!europa.asd.contel.com!darwin.sura.net!zaphod.mps.ohio-state.edu!pacific.mps.ohio-state.edu!linac!att!ucbvax!wl.com!schultp
From: [e-mail] (Paul Schultz)
Newsgroups: comp.sys.apple2
Subject: Accelerator Performance
Message-ID: <[e-mail]>
Date: 11 Sep 92 04:33:22 GMT
Sender: [e-mail]
Lines: 38

I am going to be getting an accelerator for my IIgs
in the near future and have a few questions:

1.  A significant performance increase is seen with a
    7 or 8 MHz ZIPGS but how noticeable is the performance
    increase between some of the upper speeds (i.e., from
    7 MHz to say 9 or 10 MHz)?? Since cost is a big issue
    for me I don't want to waste money on a 9/10 MHz card
    when a 7/8 would really do the job for me.

2.  What are some of the system bottlenecks that would cause
    the effective increase in performance to "plateau" at the
    higher speeds.

3.  I assume disk I/O is a bottleneck. I am also planning on
    buying a used Apple DMA SCSI card to replace my Rev. C
    card.  Will the DMA Card relieve the "bottleneck" as well
    as a RF card when using a 7 or 8 MHz ZIPGS??

As you can see I really don't want to overspend on an accelerator
card if a lesser speed will do the job.  Likewise, I can get an
Apple DMA SCSI card for much less than a RamFAST and would like
to save money here if it won't hinder performance too much. I
actually was planning on the following set-up:

7 MHz, 8Kb ZIPGS
Apple High Speed DMA SCSI card.

Do these two cards match up fairly well?

4.  Oh, one final thing!  With the proposed set-up what would be
    the most cost effective Cache size for the ZIPGS?


Thanks in advance,

Paul Schultz
[e-mail]