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Are these external monitor ports on this LC 575?

I would very much say yes. When my dad bought a large lot of LC550/575/580s from our elementary school when they were cleaning out storage, a couple of them had an adapter that was almost exactly like the one in the picture. Although I do not recall any of them having VGA-15 on them as well.

 
Maybe for a profector/TV. Back when I was in middle school we had 5X00s with composite out to 27" CRT TVs in the classrooms. One per classroom with the machine being for the teacher's use, that is. No one laptop per student back then. I had my PowerBook 5300cs (unless I went retro with the Duo 230 or 180 that day), of course... 8-)

 
This computer...It was my teacher's computer in 6th grade. I always acted up in class so as punishment, had to sit in front of this thing and watch this colorful line screensaver for a good half a year. :o) I wonder if that screensaver exists in the nets still..

 
Yes, those would appear to be a Mac monitor DB-15 and a VGA DA-15. I'm kind of amused at the way they've been glommed on there.

 
FlyingToaster :colorful line screensaver
Click to expand...
String_Theory_by_nmsmith.jpg


string theory

by After Dark

After Dark include Flying Toasters
smiley_beige.gif


After Dark download search for After Dark (Mac Utilities)

______________________________________________________________________________

my apple collection

.

 
Im going to have to try it later on a color, AD is on only a b/w in front of me... BUT! I think this screensaver was an extension. I believe it was it's own extension because

1.) I had After Dark 2+3.0 on my mac at the time and don't recall seeing the same thing at home.

2.) I brought a floppy to school and while the teacher (112 year old grandma) wasn't looking, I copied the file to my floppy. Since long gone..

 
I remember there actually were third party mods for the 575 that gave it external video...my guess is that thats what this is.

 
I have one called a Presentation something or other for the 575.

You screw the video port into the back of the case and place a socket over a video chip inside the 575, pretty simple setup.

 
I must have overlooked that add-on back in the day. Anyone remember the capabilities, did it just mirror the internal display?

 
IIRC, they were made by a company called Power-R. My guess is that they were mostly used in schools or universities when they needed to connect a 575 to a projector. And yeah - they just mirrored the built in display. (kinda lame, really - given that the LC575's video subsystem is the same as that on the 475, which can support up to 832x624 in 16 bit colour, or 1152x870 in 8 bit colour with a full 1MB of VRAM)

 
It was a key add-on for marketing purposes, as the LC575 was used extensively in schools and as the machine needed to do double duty there as a presentation device (the next big thing around 1993). If you look at the vintage advertising materials contemporary with the machine over on vectronicsappleworld.com, the feature was heavily publicized.

Now, it was also possible to pop something like a Lapis LCPDS video card into one of these and get monitor spanning capabilities with up to a 20" screen connected — and with some of those handful cards, accelerated video at that — but that is not what we've been talking about.

 
I just snagged the auction pics (still up!) for when they go bye-bye!

Great screen saver/wallpaper! I'm going to see how it looks scaled to fit 1080p! :approve:

 
I have that mod, by the way. Unfortunately I could never get it to work. It clips onto the video processor with a ribbon cable that runs to those VGA ports. You screw in the board onto the grate there and connect the ribbon cable. I bought it because I wanted to replace the CRT in my computer with an LCD.

I can take pictures of it if anyone is interested.

 
I believe Power-R was the same company who made one for the Classic. It was a dongle that came out the security port in the back and connected to the logic board connector inside the Mac. I think I actually have one somewhere but have no other equipment to use it with. As I recall, it had a CGA-type port on it.

 
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