Summary on IIsi upgrade

[Info-Mac]

Download: http://archive.info-mac.org/info/hdwr/h ... aq-103.hqx

This is the FAQ for the original Macintosh DOS Compatibility Card.

This is minor update to the old version 1.02. There are only minor changes.
This file should replace the older houdini_faq_102.hqx in info/hdwr

- Anton




Below is a document which shows the correct pin connections necessary to
construct a cable to connect HP48 calculators to Macs. It is much cheaper
to make your own than to pay the $30+ that they go for retail. Once you
have the wire you can download software to the HP48 with any kermit program.
There is much software for the HP48 available at seq.uncwil.edu, and
hpcvbbs.cv.hp.com. These include math programs, utilities, games, universal
remote programs, etc.


Darren

-----------------------------------------------------------------------
PIN CONNECTIONS FOR HP48 TO MACINTOSH CABLE

By Darren Cokin ([email protected])




Here's the FAQ sheet I compiled on the 25MHz upgrade for the IIsi. A couple of
people requested that I send it to you for archiving in your reports section.

-Matt Friedman
[email protected]

-----
FAQ: Upgrading your Mac IIsi from 20MHz to 25MHz
Version 1.3
Compiled by Matt Friedman
[email protected]
27 January 1993

-----

This FAQ was compiled from comments, letters, and posts to



Report on poll of users who have upgraded their IIsi clock oscillators for
higher speed. Suggest placement in reports folder.

------------------------------
This poll was conducted to help users decide whether or not to alter their
IIsi clock oscillator. I have attempted to gather as many case histories as
possible to find some estimate of success and risk. The number of replies
probably shows how rare this modification is but give the impression that
success rates may be higher than the previous 80% estimate. 25 of 25
machines were able to run at 25 mhz when no add on boards were present.
This is not a scientific survey but it is the best we have to work with.

Thanks to all who contributed to this poll.


Issues:



Greetings all-

After offering some (apparently mistaken) advice on how to clean up
the speaker contacts on the IIsi, I received the following note from
Mike Strange. It seems that he knows what he is talking about! He
gave me permission to publish it here.

Ethan Benatan
[email protected] http://www.pitt.edu/~ethan

============================

Mike Strange's advice on cleaning copper contacts
-------------------------------------------------




Many thanks to everyone who answered my query on how to improve the
performance
of a Mac IIsi. My original query is as follows:

>>A friend of mine has a Mac IIsi with which she does desktop publishing
and
>>graphic design. She has an Apple 13" color monitor, and the slowness
>>of the Mac in refreshing the screen is getting to her. She is considering
>>some kind of upgrade.

>>Is it better for her to get (1) an accelerator that upgrades the CPU
(maybe
>>one with a 50-mhz 68030 chip), or (2) a graphics accelerator that
>>specifically speeds up the video? Are (1) and (2) incompatible (i.e. does
>>getting a CPU accelerator board makes it impossible for her to install a
>>graphic accelerator when she ready to go to 24-bit color?) What options