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2 total messages Started by szmanda Thu, 10 Jan 1985 04:13

#306

Author: szmanda
Date: Thu, 10 Jan 1985 04:13

7 lines
934 bytes

I must have misplaced the mini-finder when it came through.  Would someone
please mail me a copy?
                                                Chuck Szmanda
                                                aluxp!szmanda
                                                AT&T Bell Laboratories
                                                Allentown PA
                                   Telephone:   (215) 439-5884

Mac Hardware - fatter macs ....

#324

Author: Paul Campbell
Date: Fri, 11 Jan 1985 17:16

27 lines
1626 bytes

(gobble...)
	Does anyone out there have any info on the mac internals (hardware)
I have read the DDJ fat-mac upgrade article and intend to do just that as soon
as I can afford it. But it would be nice to be able to run those programs that
will depend on having 512k heap as well as having a RAM-disk. I intend to also
put in another 512k for use as a RAM-disk (at $250-300 its cheaper than another
floppy and far far far faster...). What I want to know is the following

	- How does the mac drive its ram chips, in particular what to the
	  SEL A and SEL B lines do.

	- Where in memory is free, it seems that there must be a lot of double
	  mapping going on.

	- Can the power supply handle the extra load (it should be able to after
	  all it powers the second floppy)

	- Will I need a extractor fan, things get pretty hot alread, esp near 
	  the analog board...

	Also wouldn't it be nice to have a CMOS/bubble memory 'disk' inside the
Mac with battery backup ...

		Thanks in advance

		Paul Campbell		ZL4TFW(ex)
					..!dual!unisoft!pc

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