Table of Contents for this issue:

More Monitor Questions
Re: upgrading Mac Classic system
Mac Keyboard Cable
RE: Classic Macs Digest 3.12
Re: Classic Macs 3.13, 3.14 *2 Mac Pluses*
RE: MacPlus ROM
RE: Classic Macs Digest 3.14
PB 100 lead acid battery pack, charging, toggle switch
WTB: Macitosh Portable
Why not a Newsgroup
Re: Networking Plus and SE
PowerBook 100/Unimplemented Trap/FPU

I have a couple of more questions about monitors. I am
staring at an Apple Basic Color Monitor, that I have
operating on an LCII in 256 colors. Right now as I type
on the screen, a phantom ridge appears that proceeds
left of the written word. I like to call it the phantom
zebra-stripe condition. At times it makes the words
appear italicized. My question is has anyone else had
this problem and is the disease terminal. My final and
last question concerns Mac Classic Screens. I have a
Mac Classic at school that I have been working on whose
picture is fine horizontally. The adjustment on that
was simple, just unscrew the one screw on the collar and
rotate it until the picture is right. What I want to
know is how to adjust the depth of the screen from top
to bottom. RIght now the bottom of the picture quites
about a half inch to 3 quarters of an inch from the
bottom of the 9" picture tube. Big thanks for your
help.....

Dale

On Mar. 15, 1997 Robert Carr wrote
on the subject "upgrading Mac Classic system":

Someone has given me a Sheikosha
SP-1000AP dot matrix printer without documentation
which seems to work only when connected to the modem
port and I cannot find ribbons for it any more.

Ribbons for the Seikosha 1000 can be obtained from
MEI/Micro Center @ 1-800-634-3478. They are item
number 626267 and cost $15.18 for a pack of six.

- Robert C.

The ribbons from MEI/Micro Center work great, but the
ink is water based, not lubricant based. This can allow
for excessive wear on the print head. One should run a
lubricant-based inked ribbon after running a water based
ribbon. One can also extend the life of the ribbon,
while lubricating the pins on your print head. Open the
plastic cover of the ribbon, spray WD-40 (or like
lubricant) on the ribbon and replace the cover. It works
good to leave the ribbon in a sealed freezer bag
overnight to allow the lubricant to equalize throughout
the entire ribbon. It's an old trick posted long ago in
the National AppleWorks User Group newsletter and
InCider/A+ mags.

---Geof Gonter---

Warning! Do not Use Telephone Handset Cable for your
Mac!!

(unless the modular connector is replaced at one end.)

The telephone handset cable looks and feels like a Mac
keyboard cable. The connectors are the same, but the
wires are different. Quoting from Larry Pina's book,
"Macintosh Repair & Upgrade Secrets":

"If the cable is wired for telephone use, and assuming
someone actually plugged it in and switched on the
computer, then chances are the logic IC is blown." (This
is an expensive repair.)

How to tell which cable you have.

If you look at the ends of the connectors side by side
(and if the wires are color coded):

The order of the Mac keyboard cable wires
- yellow, green, red, black and yellow, green, red,
black

The order of the Tele handset cable are reversed
-- yellow, green, red, black and black, red, green,
yellow (ie the telephone cable is a "straight-through"
cable)

You need a keyboard cord to go to the Mac, a common
phone cable works fine.

No it doesn't. A common phone cable reverses the
connection, potentially damaging the computer or
keyboard. (You may have used an uncommon phone cable
that doesn't).

cmartin

Right!

Have one power cord, one keyboard, one mouse with one
serial pin missing.

No NO NO -

The keyboard cord is the same as the cord from a
telephone handset to the phone, not the one used from
the phone to the wall. The Mouse is supposed to have
one pin missing, only 8 pins but 9 spots available in
the plug.

No no no.

Yours: David

Subject: RE: Mac SE upgrade questions
Date sent: Thu, 13 Mar 97 18:35:25 -0500
From: "L.F."
To: "cmpost" <classic-post@hitznet.com >

<snip>

Some friends advise me to go to a Windoze.

Like you they have an investment to protect. No-one
likes admitting that what they have is second class so
they hide behind myths, misinformation and higher market
share.

The lower cost is tempting,

if you compare the cost and features of old macs to old
pcs then you would take a mac every time. Better
screens, better sound, SCSI HD - the original plug and
play, easy networking, better quality software. Todays
Macs are just as competive price/feature-wise with all
but the cheapest clones. Don't listen to PC people, shop
around yourself.Í

PBJ

Have one power cord, one keyboard, one mouse with one
serial pin missing.

>The keyboard cord is the same as the cord from a
>telephone handset to the phone, not the one used from
>the phone to the wall. The Mouse is supposed to have
>one pin missing, only 8 pins but 9 spots available in
>the plug. NeonGooch (posted in 3.14)

No it doesn't. A common phone cable reverses the
connection, potentially damaging the computer or
keyboard. Clark Martin Redwood City, CA, USA
(also posted in 3.14)

Opps, that caught my memory once mentioned!
I use a phone handset to phone base cable, I found one
that wasn't spiral so I could run it under my Mac
because I have it on a computer table with a pull out
keyboard. *I lifted up the Plus and found my cable
splice, all four wires were cut and resoldered
oppisite.* I made my splices staggered so unisulated the
bare soldered wires could not touch.I wrapped them each
in electrical tape, then all four together. If you look
in the ends of a phone cable, holding them both the same
way, you will see the wires reverse color order. If you
look at a real MacPlus keyboard cable you will see that
the color order is the same at both ends.

Very sorry, hopefully no harm done,

NeonGooch

There were three versions of the 128K ROMs. The first
version was buggy, the second and third OK. To check
which ones you have, boot the unit, hit the rear of the
two "programmer's switches" on the side of the box.
(If you don't have a switch, get a little flashlight
and look into the grilles on the bottom left side of
the case - use a toothpick or micro-screwdriver to
press the rear button) You'll get a dialog box with
this prompt "". If you get a system error, you have
older 68K ROMs.

Anyway, type DM4000000 and press "return". THe box
will fill with a bunch of code. Look at the top row,
second and third columns. If you see 4D1E EExx , you
have version one ROM. If you see 4D1E EAxx or 4D1F
81xx you have version two or three respectively. Type
"G" and "return" and you are back in Kansas. george

What do you type and where do you look? I typed that in
after interrupting and never found "4D1E" or "4D1F". I
pressed return several more times to see additional
windows of info and still never saw the first part. I
tried it on a Plus made in the first week of April 1986,
running system 6.0.7 both under the finder and
multifinder though I'm guessing that part makes no diff.
Sorry if I'm doing something stupid, I don't play in
that area much.

NeonGooch

Date sent: Fri, 14 Mar 1997 22:04:16 -0500
To: classic-post@hitznet.com
From: Terry Galka
Subject: Networking Plus and SE

I have aquired a Mac Plus and SE. I would like to network
them so I can exchange software and use as a
communication device at my home (to play with). What
do I need to network in System 6.08 ?

Load system 7 on the SE, or find a Claris freeware
product called 'Public Folder'. It transfers files
around macs in a relatively easy manner. It works with
system 6 and uses the Chooser so you can operate it from
within an application. You can get away with a simple
phonenet network or a plus to mini 8 imagewriter II
printer cable as the connection between the 2 macs.

PBJ

This message was about PB 100 batteries....

when it is "unconnected", ALL batteries are not
connected to the computer. This saves their power from
slowly draining out if you don't use it for some time.
Remember that with this computer you should NEVER let
the main battery drain completely.

Bye,
Cesare

I can't think of any battery type off hand that should ever be fully
discharged. But in the case of the lead acid PB 100
battery, _remaining_ discharged is the culprit. The PB
100 circutry will shut down the PB 100 as the battery
voltage reaches a predetermined value. Probably about
1.0 volts per cell. This is to keep you from possibly
losing data rather than to protect the battery from
overdischarging.

Few devices that use rechargable batteries have low voltage shutdown
circuts just to protect the batteries. The manufacturer
just makes more money selling replacement batteries :)
But this low power shut down serves both to protect your data and to
protect the battery from being fully discharged. Using
the PB 100 to the point where it shuts down does not
fully discharge the battery.

Lead acid batteries do not experience the memory
effect that Ni-CADs can. So you can recharge from any battery charge state to top
off the battery.

The PB 100 battery is a lead acid battery and should never be allowed to
remain discharged. Start recharging as soon as is practical.
The toggle switch is a means to disconnect the battery from the charging
circut for the times when you will leave your PB 100 set
up on your desk and perma-plugged into an AC outlet.

Mike

I am not sure if this is appropriate to this, if not, my
apologies.

I am looking for a Mac Portable. Extra memory and a
larger hard drive would be nice but not necessities.
Price must be reasonable.

Thanks
James L. Wiley

I enjoy reading Classic Macs Digest, but I wonder why you are not a
regular ol' Newsgroup that I could read with "Newswatcher" like all the others?

Thanks!
JG

Date sent: Fri, 14 Mar 1997 22:04:16 -0500

I have aquired a Mac Plus and SE. I would like to network
them so I can exchange software and use as a
communication device at my home (to play with). What do
I need to network in System 6.08 ?

Thanks,
Terry

Nothing .... all the networking software comes with the
System(if i remember well),you will need though,A.T.
connectors .You need 1 Phone connector for every device
connected to the network.I suggest you get self
terminating boxes.

Self terminating connectors have a switch on it instead
of the removable condenser which is easy to loose.

LF

SoftwareFPU will not work on 68000 machines such as
the Macintosh Plus, SE, Classic, Portable, and
PowerBook 100.

-- from the SoftwareFPU (2.41) documentation

David Buchner