Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!yale!mintaka!ogicse!orstcs!jacobs.CS.ORST.EDU!throoph
From: throoph@jacobs.CS.ORST.EDU (Henry Throop)
Newsgroups: comp.sys.apple
Subject: Re: The Apple IIf
Message-ID: <16217@orstcs.CS.ORST.EDU>
Date: 24 Feb 90 08:30:20 GMT
References: <900222.14492460.054933@UWEC.CP6> <NAGENDRA.90Feb23124032@bucsf.bu.edu> <1990Feb23.190539.18534@ux1.cso.uiuc.edu>
Sender: usenet@orstcs.CS.ORST.EDU
Reply-To: throoph@jacobs.CS.ORST.EDU.UUCP (Henry Throop)
Organization: Oregon State University - CS - Corvallis Oregon
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In article <1990Feb23.190539.18534@ux1.cso.uiuc.edu> cs122aw@ux1.cso.uiuc.edu (Scott Alfter) writes:
<In article <NAGENDRA.90Feb23124032@bucsf.bu.edu> nagendra@bucsf.bu.edu (nagendra mishr) writes:
<
<>Here's an idea. I don't know how it would far in applicativity, but
<>how about somehow having a configure option on the system disk which you
<>would let you tell the system exactly what you wanted to have installed in
<>the system.   Once this is done, the system copies the memory image onto
<>disk.  This way, when you boot up, you the system fast loads the memory
<>image into memory and you're up and running in a very short amount of time.
<

You can do this yourself if you have 2MB or so of RAM by putting the system
on the RAM disk and then using Copy II+ (v 7.1 and previous) or another
program to copy the RAM disk image to a floppy.  Restore this, boot from
teh RAM disk, and you may have saved yourself a second or two off booting
the floppy directly.

>Here's an idea for getting the system disk into memory:  make an EEPROMdisk.
[...]
>another button to erase the EEPROMs and start over again.  EEPROMs have several
>points in their favor:  they don't require continuous power like SRAMs, and
>they can be erased electrically, instead of by using ultraviolet radiation as
>with ordinary EPROMs.

Yes, but they also have several points against them; namely - cost and
availibility.  Last time I checked, there was only one place I found that
had 28256's (32k x 8, I think?), and it would have cost about $600 for four
of them (128K) to put on my AST Ramstak+.  I _think_ they're pretty slow, too -
200 ns or so.
 
>Scott Alfter-------------------------------------------------------------------

Henry

---
Henry Throop
Internet: throoph@jacobs.cs.orst.edu