From: skwong@cuse1.se.cuhk.hk (Wong Sai Kee (Graduate Assistant))
Subject: Re: IIsi accelerators and big video
Organization: Faculty of Engineering, The Chinese U. of Hong Kong
Date: Sun, 3 Jan 1993 11:48:06 GMT

akhiani@ricks.enet.dec.com (Homayoon Akhiani) writes:

>|>>I am about to purchase a DayStar PowerCache 40MHz with FPU. My question
>|>>is how do people like them and if I decide to get a 16" or 19" monitor
>|>>later in the year, will there be enough room and power to run the monitor?
>|>
>|>I also want to buy an accelerator card (may be the newer & cheaper
>|>LogicXXXX 50MHz030 w/ FPU) and a 24bit Color w/ digitizer (e.g. the
>|>VideoSpigot Pro) in the future.  And I also concern about the power
>|>consumption & heat problem in a Mac IIsi as the Technical Manual said
>|>the max limited is 7W only and the VideoSpigot Pro is 15W?
>|>
>(from what I know)
>1st: DayStar Dualport IIsi let you plug in a Powercache and still have another
>PDS slot. How much power is avaliable there? I asked them at MacWorld, their
>answer wasn't clear! When you buy a Powercache for IIsi the sell you a adapter 
>which "looks" excatly like DualportIIsi.

I know.

>2nd: From "Guide to design NUbus card" (or something like that) published by
>Apple, the IIsi Nubus slot supplies 13.3W (I really don't know where you heard 
>7W) 

Strange enough, the "Mac IIsi,LC, & Classic Developer Notes APDA
M0991LL/A" didn't told me how much power can the PDS deliver?  P.56
pointed the reader to check it out from Chapter 14 of "Designing Cards
and Drivers for the Mac Family, 2nd ed".  For the sake of updated
information, I ignored the 2nd ed from my bookshelf and checked the 3rd
ed.  P.115 said 13.3W as you had mentioned.  But . . . P.353 stated for
thermal considerations, the total power of the expansion card should not
exceed 7W.  If this implied the expansion card only (not included
adapter card), then adding the adapter card's maximum consumption in
P.362 for 2.5W, the total should be 9.5W only.  See?

So, it is not I heard from somewhere, it is printed on Apple's
document.

>3rd:Supermac has something called VideoSpigotProIIsi. Thats a 24bit display card
>+ the normal Spigot.(they using a adapter called "0 Slot Adapter"!)

I want the 24bit accelerated graphics (claimed as 6 times faster) and
the video digitizer.  My understanding (may be wrong) is 0 Slot Adapter
is something like the Powercache's Dualport IIsi.

>As far as I know, If you really need to have Powercache and 24bit display,
>TODAY's solution is to get a NUbus expansion box (NB4) from SecondWave Inc.
>(I saw it at MacWorld, has anyone ever used one of these?)
>and your IIsi will have 4 Nubus slot * 13.3 Watt each.

My conflict is: I want as compact as IIsi (else I will use ci as well)
with 50MHz 030 + accelerated QuickDraw + video digitizer.

>TOMORROW, someone might come up with a 24display card to be used by Powercache 
>in a IIsi.

I hope so.

Mr.Sai-Kee WONG

>--
>-------------------------------------------------------------------------------
>Homayoon Akhiani                               "Turning Ideas into ... Reality"
>Digital Equipment Corporation                        "Alpha, The New Beginning"
>77 Reed Rd. Hudson, MA 01701            "All Rights Reserved. Copyright(c)1992"
>Email: akhiani@ricks.enet.dec.com     "The words are mine, and not my employer"
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