[comp.sys.mac.hardware] Number of slots for mem chips?

knrgroup@garnet.berkeley.edu (Raymond group) (09/28/90)

Here's a quickie.  How many slots are there on the Mac SE for memory
chips?  How many are used in the shipped configuration?
Thanks in advance.

clarson@ux.acs.umn.edu (Chaz Larson) (09/28/90)

In article <1990Sep27.205733.9185@agate.berkeley.edu> knrgroup@garnet.berkeley.edu (Raymond group) writes:
>Here's a quickie. 
>How many slots are there on the Mac SE for memory
>chips? 

Four.

>How many are used in the shipped configuration?

Two or four.

The standard [original] SE is shipped with four 256K SIMMs in place, giving a
total of 1 megabyte of RAM.

The SE 2/40 is shipped with 2 1-meg SIMMs in place, giving a total of 2 
megabytes of RAM.

The SIMMs must be replaced in pairs, so the possible memory configurations in
an SE are:

	 256	 256	 ---	 ---		=	512K RAM
	 256	 256	 256	 256		=	1024K RAM
	1024	1024	 ---	 ---		=	2048K RAM
	1024	1024	 256	 256		=	2560K RAM
	1024	1024	1024	1024		=	4096K RAM

Which are, top to bottom, 1/2, 1, 2, 2.5, and 4 megabytes.

Does that over-answer your question?

>Thanks in advance.

You're welcome.

chaz

-- 
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       "I Am The Reincarnation of Abraham Lincoln", Insists Prince. 
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clarson@ux.acs.umn.edu                                       AOL:Crowbone

wwtaroli@rodan.acs.syr.edu (Bill Taroli) (09/28/90)

In article <1990Sep27.205733.9185@agate.berkeley.edu> knrgroup@garnet.berkeley.edu (Raymond group) writes:
>Here's a quickie.  How many slots are there on the Mac SE for memory
>chips?  How many are used in the shipped configuration?
>Thanks in advance.

Well, it depends upon the configuration you order. There are two rows of SIMM
slots in the SE. Each row has two SIMM slots. Thus, you must install SIMMs in
pairs when using an SE. The possible memory configurations are:

 RAM (in KB)     Row 1     Row 2
=============   =======   =======
 512            2x256K      ---
 1024           2x256K    2x256K
 2048           2x1024K     ---
 2560           2x1024K   2x256K
 4096           2x1024K   2x1024K

 Hope this helps.

 Regards,

--
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