[comp.sys.mac.system] Brightness

time@ice.com (02/16/91)

In article <norton.666717600@extro>, norton@extro.ucc.su.oz.au (Norton Chia) writes:
> Look, if you haven't got a Mac Classic, chances are you don't need it.
> In short, it's for controlling a Classic's screen's brightness via the
> Control Panel instead of a rotary switch as per Plus/SE.

And for portables...

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norton@extro.ucc.su.oz.au (Norton Chia) (02/16/91)

MUSJJH@lure.latrobe.edu.au writes:

>Hi there!

>I've recently acquired System 6.0.7 (sans manuals) and am curious
>as to what the CDEV/INIT "Brightness" does.

>Any knowledgeable pundits out there?

>JAson Hellwege					La Trobe Uni, Melbourne, Oz.

>     	"We don't get Shintoists round here shattering sheetglass in	
>	the shithouse and shouting slogans......"

Look, if you haven't got a Mac Classic, chances are you don't need it.
In short, it's for controlling a Classic's screen's brightness via the
Control Panel instead of a rotary switch as per Plus/SE.

Norton

gsm@gsm001.uucp (Geoffrey S. Mendelson) (02/17/91)

>I've recently acquired System 6.0.7 (sans manuals) and am curious
>as to what the CDEV/INIT "Brightness" does.


On the MAC CLASSIC only, it controls the sreen brightness.  BTW it will
not let you turn the screen so far down that you can't see it.
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MUSJJH@lure.latrobe.edu.au (02/17/91)

Hi there!

I've recently acquired System 6.0.7 (sans manuals) and am curious
as to what the CDEV/INIT "Brightness" does.

Any knowledgeable pundits out there?

JAson Hellwege					La Trobe Uni, Melbourne, Oz.

     	"We don't get Shintoists round here shattering sheetglass in	
	the shithouse and shouting slogans......"

francis@zaphod.uchicago.edu (02/17/91)

In article <1991Feb16.165813.21427@gsm001.uucp> gsm@gsm001.uucp (Geoffrey S. Mendelson) writes:

   >I've recently acquired System 6.0.7 (sans manuals) and am curious
   >as to what the CDEV/INIT "Brightness" does.

   On the MAC CLASSIC only, it controls the sreen brightness.  BTW it will
   not let you turn the screen so far down that you can't see it.

Does it display in the Control Panel on other Macs?

I'm faintly annoyed at Apple's habit of including ridiculous cdevs in
standard Systems.  For example, Startup Device.  Nobody needs this
unless they've got more than one hard drive, right? The vast majority
of Macs out there seem to have it, simply because so many people don't
know what it's for.

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gsm@gsm001.uucp (Geoffrey S. Mendelson) (02/17/91)

>
>   >I've recently acquired System 6.0.7 (sans manuals) and am curious
>   >as to what the CDEV/INIT "Brightness" does.
>
>   On the MAC CLASSIC only, it controls the sreen brightness.  BTW it will
>   not let you turn the screen so far down that you can't see it.
>
>Does it display in the Control Panel on other Macs?


Of course, where else would they put it?

2 more notes on the Classic:

1.  The diskless ROM Boot does not work on a system with a hard drive. 
    So no "today I'd rather boot from the server, thank you."

2.  On the back cover, over the power switch, is a little panel that comes off.
    I assume that the expansion slot (called by Apple the "Memory Slot") is 
    right behind it.  This would make the "My SE has a slot and the Classic
    doesn't" argument moot. Especially since you can buy 68030, memory,
    and ethernet cards for this "nonexistant" slot.
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fry@zariski.harvard.edu (David Fry) (02/17/91)

Someone (???) wrote:
>>Does it [Brightness cdev] display in the Control Panel on other Macs?
>

Geoffrey S. Mendelson writes:
>
>Of course, where else would they put it?

cdevs have the capability of NOT appearing in the Control
Panel on Macs where they don't apply.  I don't know about
other Macs, but the Brightness cdev does not appear on my Mac
IIfx.  I expect it only shows up on the Classic.

David Fry                               fry@math.harvard.EDU
Department of Mathematics               fry@huma1.bitnet
Harvard University                      ...!harvard!huma1!fry
Cambridge, MA  02138            

norton@extro.ucc.su.oz.au (Norton Chia) (02/17/91)

gsm@gsm001.uucp (Geoffrey S. Mendelson) writes:

>2 more notes on the Classic:

>1.  The diskless ROM Boot does not work on a system with a hard drive. 
>    So no "today I'd rather boot from the server, thank you."

>2.  On the back cover, over the power switch, is a little panel that comes off.
>    I assume that the expansion slot (called by Apple the "Memory Slot") is 
>    right behind it.  This would make the "My SE has a slot and the Classic
>    doesn't" argument moot. Especially since you can buy 68030, memory,
>    and ethernet cards for this "nonexistant" slot.
>-- 

This is an interesting observation. The only expansion slot the Classic has is
a memory expansion slot. There is no need for any contact between the outside 
world and the expansion slot through any panel ala the SE. What you have found
I believe, is the panel that covers the adjustment holes for the in-built
screen's brightness, horizontal and vertical alignments, contrast etc.
Correct me if I'm wrong on this one.

Cheers,
Norton Chia

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bskendig@bird.Princeton.EDU (Brian Kendig) (02/17/91)

In article <1991Feb17.041120.28188@gsm001.uucp> gsm@gsm001.uucp (Geoffrey S. Mendelson) writes:
>>   >I've recently acquired System 6.0.7 (sans manuals) and am curious
>>   >as to what the CDEV/INIT "Brightness" does.
>>
>>   On the MAC CLASSIC only, it controls the sreen brightness.  BTW it will
>>   not let you turn the screen so far down that you can't see it.

Right.  To save money, Apple gave the Classic internal brighness
control through software rather than having to worry about the dial.

>>Does it display in the Control Panel on other Macs?
>
>Of course, where else would they put it?

Of course not.  The other Macs have hardare brightness controls, and
no ability to control brighness through software. Brighness won't show
up in an SE's Control Panel, for instance, for the same reason that
the Color and Monitors cdevs don't show up: they don't do anything.

>2 more notes on the Classic:
>
>1.  The diskless ROM Boot does not work on a system with a hard drive. 
>    So no "today I'd rather boot from the server, thank you."

It doesn't?  Funny, then I guess I'll have to tell my neighbor to stop
using it on his Classic 2/40...  ;)

Seriously: I'm rather certain that it does still work on an HD system.
(In case you're intersted in trying it: hold down Command-Option-X-O
as you boot your Classic.)

>2.  On the back cover, over the power switch, is a little panel that comes off.
>    I assume that the expansion slot (called by Apple the "Memory Slot") is 
>    right behind it.  This would make the "My SE has a slot and the Classic
>    doesn't" argument moot. Especially since you can buy 68030, memory,
>    and ethernet cards for this "nonexistant" slot.

Huh?  I don't follow.  You mean to say that just because the memory
expansion slot on the Classic is right behind a panel above the power
switch, then it's really a slot for expansion cards and Apple lied to
us?  I tend to believe Apple when they say that you can't put
expansion cards or such in your Classic (without frying both the
machine and the board).

     << Brian >>

| Brian S. Kendig      \ Macintosh |   Engineering,   | bskendig             |
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bdugan@teri.bio.uci.edu (Bill Dugan) (02/17/91)

In article <6345@idunno.Princeton.EDU> bskendig@bird.Princeton.EDU (Brian Kendig) writes:
>>>   On the MAC CLASSIC only, it controls the sreen brightness.  BTW it will
>>>   not let you turn the screen so far down that you can't see it.
>
>Right.  To save money, Apple gave the Classic internal brighness
>control through software rather than having to worry about the dial.

Don't forget the Mac Portable!  It uses Brightness too.  Also in System 7.0,
it will work on all the Macs with grayscale or color displays.

>Huh?  I don't follow.  You mean to say that just because the memory
>expansion slot on the Classic is right behind a panel above the power
>switch, then it's really a slot for expansion cards and Apple lied to
>us?  I tend to believe Apple when they say that you can't put
>expansion cards or such in your Classic (without frying both the
>machine and the board).

But they already have announced expansion boards for the Classic....

bill

gsm@gsm001.uucp (Geoffrey S. Mendelson) (02/18/91)

norton@extro.ucc.su.oz.au (Norton Chia) commented on my comments:

My comment:

>>2.  On the back cover, over the power switch, is a little panel that comes off.
>>    I assume that the expansion slot (called by Apple the "Memory Slot") is 
>>    right behind it.  This would make the "My SE has a slot and the Classic
>>    doesn't" argument moot. Especially since you can buy 68030, memory,
>>    and ethernet cards for this "nonexistant" slot.
 
His comment on my comment:

>This is an interesting observation. The only expansion slot the Classic has is
>a memory expansion slot. There is no need for any contact between the outside 
>world and the expansion slot through any panel ala the SE. What you have found
>I believe, is the panel that covers the adjustment holes for the in-built
>screen's brightness, horizontal and vertical alignments, contrast etc.
>Correct me if I'm wrong on this one.

You may be right. The pre SCSI MACs had their battery door replaced
with battery doors that had SCSI conneter slots when third party controllers
were added.  This leads me to beleive that it was left "loose" for a reason.

There are now 3rd party cards that go into this "memory card" (only?) slot.
They include:

    Memory only.  (ala Apple's card)

    Memory and a proprietary (sp?) expansion slot.
       With promises of Ethernet, external display, and 68030 cards
       for the expansion slot on the memory card. 

    68030 cards.


The "fact" that  the memory card slot can only be used for memory cards seems
to exist only in Apple's mind.  I think that it is a ploy to keep selling the
Se's that are languishing on dealer's shelves.


In the U.S. you can buy a Classic for $900.00, add in a thrid party
68030 for about $700, 3 meg (more) of ram of $150, and a 40 meg SCSI disk for
about $300.  For about $2000.00 you get the equivalent of an Se30 4/40.
I expect that the price will stabilize (when supply meets demand) at 
$700-800 for the bare Classic and about $400 for the 68030 card.

What will this do the 2nd hand Se/Se30 market?   


-- 
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|  Geoffrey S. Mendelson  |  Computer Software Consulting    |    Dr.      |
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ashish@brahms.udel.edu (Ashish Shankar) (02/20/91)

In article <1991Feb16.165813.21427@gsm001.uucp> gsm@gsm001.uucp (Geoffrey S. Mendelson) writes:
>
>On the MAC CLASSIC only, it controls the sreen brightness.  BTW it will
>not let you turn the screen so far down that you can't see it.
>-- 

On the Classic (2/40) that I have regardless of what you set the brightness
to, it resets to an intermediate value on reboot - (either a power up
or a <RESTART> ). Is this a feature/bug ? or have I installed
something incorrectly ? It certainly is irritating since I like to
have the screen fairly dim.

Ashish Shankar (ashish@brahms.udel.edu)

gsm@gsm001.uucp (Geoffrey S. Mendelson) (02/20/91)

ashish@brahms.udel.edu (Ashish Shankar) asks:
>
>On the Classic (2/40) that I have regardless of what you set the brightness
>to, it resets to an intermediate value on reboot - (either a power up
>or a <RESTART> ). Is this a feature/bug ? or have I installed
>something incorrectly ? It certainly is irritating since I like to
>have the screen fairly dim.

Off the top of my head, I was going to say that your PRAM was getting zapped,
or your battery (soldered on the Motherboard) was dead.

Then I tried it on my Classic, viola' it don' work. I think you found a 
feature.

Definition of a feature: "A bug in a three-piece suit."

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rhumphre@silver.ucs.indiana.edu (Robert P. Humphrey) (04/14/91)

In article <1991Feb17.041120.28188@gsm001.uucp> gsm@gsm001.uucp (Geoffrey S. Mendelson) writes:
>2. On the back cover, over the power switch, is a little panel that comes off.
>    I assume that the expansion slot (called by Apple the "Memory Slot") is 
>    right behind it.  This would make the "My SE has a slot and the Classic
>    doesn't" argument moot. Especially since you can buy 68030, memory,
>    and ethernet cards for this "nonexistant" slot.

	If you actually look behind that panel, I believe you will
find manual brightness controls, not an expansion slot.  (Why would
they advertise that it has no expansion slot if it wasn't true?)

	Bob
--
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       Robert Humphrey,       "It's easy to grin when your ship comes in,
       Gentleman Scholar      And you've got the stock market beat;
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                                                  -Ted Knight, Caddyshack
*******************************************************************************

hamilton@kickapoo.cs.iastate.edu (Jon Hamilton) (04/15/91)

gsm@gsm001.uucp (Geoffrey S. Mendelson) writes:

>>
>>   >I've recently acquired System 6.0.7 (sans manuals) and am curious
>>   >as to what the CDEV/INIT "Brightness" does.
>>
>>   On the MAC CLASSIC only, it controls the sreen brightness.  BTW it will
>>   not let you turn the screen so far down that you can't see it.
>>
>>Does it display in the Control Panel on other Macs?


>Of course, where else would they put it?


>2 more notes on the Classic:
um, no, if you put the brightness cdev in the system folder of a machine which
won't use the cdev, it won't show up in the control panel.  Thank you for not
checking into your answers before misleading potentially thousands of people.

[more stuff that has been said thousands of times deleted...]
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