Re: [q] Max RAM in Quadras, Im Back

[PsycoPunkn]

In a message dated 2005-04-15 3;22;49Nite, [EMAIL PROTECTED] writes:

<< The original poster seems a bit confused on 
what type of SIMM socket the Q950 bears.  An easy mistake to make,  >>

Nope.  You can name any Mac and I can, off the top of my head, tell you 
everything (technical) about it.  When I was on the Quadlist a few years ago, 
someone said that there is a such thing as a 32MB 30 pin SIMM.  So, I thought I 
verified, perhaps not.

chris

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Re: [q] Max RAM in Quadras, Im Back

[PsycoPunkn]

In a message dated 2005-04-14 3;46;55Nite, [EMAIL PROTECTED] writes:

<< I'm pretty sure they don't.  Remember, the Q950, 900,
and 700 used 30 pin simms, while the rest of the
Quadras used 72 pin simms. >>

I know what uses what.  There are 32MB 30 pin SIMMs from the PC world.  And 
there are also 64MB 72 pin SIMMs from PCs, and I know 128MB 72 pin SIMMs exist 
(MicroMac makes these)

Chris

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Re: [q] Max RAM in Quadras, Im Back

[Jeff Walther]

At 15:30 -0400 04/14/2005, Quadlist wrote:
From: "Dan S" <[EMAIL PROTECTED]>
Subject: Re: [q] Max RAM in Quadras, Im Back
Date: Thu, 14 Apr 2005 14:40:52 -0500


 I havent been on the quadlist for probably a couple of years now, but I
 just cleaned out my closet, and now I wanna get my Quadra 950 back up and
 running.  One of my first questions, which Im sure has been asked 
many times (I
 know it was a few years ago), will 32MB SIMMs work in a Quadra 950?
32MB 30pin SIMMs? Never seen any advertised. Were such things made?
Nope, no such thing.  The original poster seems a bit confused on 
what type of SIMM socket the Q950 bears.  An easy mistake to make, 
because all the later Quadras used 72 pin, but the Q700, Q900 and 
Q950 used 30 pin SIMMs in banks of four.

Thirty pin SIMMs have twelve address pins.  Addressing to RAM is 
multiplexed in row and then column, so the total number of address 
bits possible is 12 X 2 = 24.  Twenty-four address bits can address 
16M addresses.  Thirty pin SIMMs have 8 bit (one byte) wide data. 
So 16M addresses yields 16M X 1 byte = 16 megabyte maximum possible 
capacity.  No larger 30 pin SIMM is possible.

Jeff Walther
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Re: [q] Max RAM in Quadras, Im Back

[Casolai !]

I have tried my 128mb simm that works in my Color Classic Mystic. In my 
840av, it shows up as 32mb only. In my Workgroup Server 80 (same as Quadra 
800), the 128mb is detected as a 64mb simm. So, I'm about 99% sure the 
Quadra800/aws80 maxes out at 264mb ram. Using the 128mb and three 32mb simms 
in my aws80 shows up as 168mb total. The Quadra 650 uses the same 
motherboard as the 800/aws80, so it should be the same with the ram.

--
Also curious
as to whether or not anyone got 64MB or 128MB SIMMs working in the
Centris/Quadra 650/800/840.
Thanks
Chris

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Re: [q] Max RAM in Quadras, Im Back

[Casolai !]

There is no such thing as 32mb 30pin simms.
To address more than 16mb requires more than 30 pins on the simm.
---
32MB 30pin SIMMs? Never seen any advertised. Were such things made?

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Re: [q] Max RAM in Quadras, Im Back

[Matt R]

I'm pretty sure they don't.  Remember, the Q950, 900,
and 700 used 30 pin simms, while the rest of the
Quadras used 72 pin simms.

> > I havent been on the quadlist for probably a
> couple of years now, but
> I
> > just cleaned out my closet, and now I wanna get my
> Quadra 950 back up and
> > running.  One of my first questions, which Im sure
> has been asked many
> times (I
> > know it was a few years ago), will 32MB SIMMs work
> in a Quadra 950?
> 
> 32MB 30pin SIMMs? Never seen any advertised. Were
> such things made?

-Matt



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Re: [q] Max RAM in Quadras, Im Back

[Dan S]

> I havent been on the quadlist for probably a couple of years now, but
I
> just cleaned out my closet, and now I wanna get my Quadra 950 back up and
> running.  One of my first questions, which Im sure has been asked many
times (I
> know it was a few years ago), will 32MB SIMMs work in a Quadra 950?

32MB 30pin SIMMs? Never seen any advertised. Were such things made?


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[q] Max RAM in Quadras, Im Back

[PsycoPunkn]

I havent been on the quadlist for probably a couple of years now, but I 
just cleaned out my closet, and now I wanna get my Quadra 950 back up and 
running.  One of my first questions, which Im sure has been asked many times (I 
know it was a few years ago), will 32MB SIMMs work in a Quadra 950?  Also 
curious 
as to whether or not anyone got 64MB or 128MB SIMMs working in the 
Centris/Quadra 650/800/840.

Thanks

Chris

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