[comp.sys.mac] upgrading Macs

holland@reed.UUCP (Lawrence of Arabia) (02/02/88)

I know that this has been asked before, but how exactly can you do your
own upgrades. I know that just adding the SIMM's might not work for some
upgrades. I heard that some resistor has to be removed. My questions are:
1: which resistor should be removed for a 128->512, which one for a 512->
	Plus, and which one for PLus->2Meg.
2: what would be the cheapest way to get the SIMM's. Mailorder?
3: I can get some of the old Mac128 Chips. Can I upgrade my Plus with these?
	And how about a friends 512KE.

Please reply as thoroughly as possible , so that I won't blow up my Mac. I
can handle the soldering and the resistor part. I just don't have the right
knowledge.


-- 
*This was the work of an Artificial Intelligence program written by the great
Michael L.Reerink. He is a student at Reed College, and he loves to be called
at (503) 774-9189. You can reach him at: ...!{tektronix, ogcvax}!reed!holland
<He programmed me to say this, so ignore it:> Mike is a very very nice person

seung@husc8.HARVARD.EDU (Hyunjune Seung) (09/14/89)

Due to the high prices of Macs these days, I am considering the following
option:  upgrade a 128K/512K/512e Mac to a Mac Plus, and then add an
accelerator board.

Does anyone have any advice as to whether I should use a 128K, 512K, or
512e as my starting point?  These days, the going rates are $550 for the
512e, $475 for the 512K, and $300 for the 128K (according to the Boston
Computer Exchange).  Also, I don't understand how the 512e is different 
from the Plus and the old 128K.  My understanding is that it's a 128K
with a double-sided disk drive, but lacking the Plus ROMS and motherboard
(with SCSI port).

Where can I buy Mac Plus ROMS cheap?
Where can I buy 800K disk drives?
Where are good sources for 128K upgrades?

Please reply to me, and I will summarize for the net.