NetNews Usenet Archive 1992 #31/NN_1992_31.iso/spool/comp/sys/mac/hardware/25200

Internet Message Format | 1993-01-03 | 1.6 KB

Path: sparky!uunet!spool.mu.edu!enterpoop.mit.edu!eru.mt.luth.se!lunic!sunic!dkuug!uts!povlphp
From: [e-mail] (Povl H. Pedersen)
Newsgroups: comp.sys.mac.hardware
Subject: Re: Funny slots in my si...what r they 4?
Message-ID: <[e-mail]>
Date: 3 Jan 93 15:55:16 GMT
References: <1993Jan3.053153.13364@bsu-ucs>
Organization: UNI-C, Danish Computing Centre for Research and Education
Lines: 24

In <1993Jan3.053153.13364@bsu-ucs> [e-mail] writes:

>Here's a stumper (I think...) for y'all.  I was poking around inside my lab's
>si tonight, trying to see what I could do to it, and I found two things which
>interest me.

>#1.  On the motherboard, there is a ROM SIMM slot.  What would this be used
>for?  Thus far I am unaware of any ROM SIMMs on the market.

The very first batches of the IIsi had the ROM SIMM like all previous
Mac II series. It stopped when Apple dgot enough of the version for soldering
on the logic board. This ROM SIMM worked OK when I tested it in my SE/30.

>#2. on the Apple Display Card, there are TWO similar slots.  I assume these are
>of VRAM.  If so, what kind (512k or 1mb) can be used, and would they enhance
>the board's performance?  For reference, we have a 21" Apple Greyscale monitor
>here.  We use it for a lot of graphics and scanning.  Would increasing the VRAM
>speed things up a bit?

Yes, they are for VRAM. VRAM gives you more colors or higher resolution.
You might be able to get 16 greys out of the monitor, or maybe 256.
--
Povl H. Pedersen   -   Macintosh specialist. Knows some DOS and UNIX too.
[e-mail]    -   [e-mail]