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LC475 / Power Macintosh 8200 / Performa 630


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1 hour ago, Danamania said:

I'd be happy with "Quadra" to mean "040"

The Four Types of 68k Mac:
- Macintosh

- Macintosh II

- Macintosh III

- Macintosh IV

 

1 hour ago, Danamania said:

Worked for Apple later with the G3/G4/G5 biz, which was a little more consistent.

I feel like product rationalization in the G3 era is a fairly significant amount of what saved Apple. There's no single hard reason for every single 040 Mac not to have been called Quadra [number] (Or Mac IV with modifiers) except that Apple tried really hard in the early-mid '90s to separate things into segment-targeted Brands(TM) (Quadra, LC, Centris, Performa) and, across the entire desktop Mac line, none of it ever ended up being consistent.

 

For example, as we've found out, there are:

- Quadras with LC040s and no Ethernet

- Centrises with Full 040s and Ethernet

- Performas with full 040s

- LCs with full 040s

 

And so on.

 

Architecturally, the 630 and 605 come directly out of the LC family. Performa is just a badge that got applied to what was mostly, architecturally and feature-wise, LC-series computers for the purpose of selling them to homes. (And  Classics and the IIvx, except for the IIvi/vx was also architecturally more similar to an LC II than a Mac II, probably for the purpose of making it cheaply.

 

Incidentally, I have utterly no idea why the Quadra 605 exists as a discrete product with its own unique case separate from the LC475, to which it is literally identical internally. I don't think "LC" as a name had any stigma associated with it in the way Performa did. It makes sense for them to badge engineer it for the different markets (edu vs. normal mac channel retail) (I mean, tbh that doesn't even make sense, but it's what Apple was commonly doing at the time) but it doesn't strictly speaking make any sense that they gave it its own case.

 

It's cute and aesthetically I'm glad it does, but.

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3 hours ago, Cory5412 said:

Architecturally, the 630 and 605 come directly out of the LC family. Performa is just a badge that got applied to what was mostly, architecturally and feature-wise, LC-series computers for the purpose of selling them to homes. (And  Classics and the IIvx, except for the IIvi/vx was also architecturally more similar to an LC II than a Mac II, probably for the purpose of making it cheaply.

 

Incidentally, I have utterly no idea why the Quadra 605 exists as a discrete product with its own unique case separate from the LC475, to which it is literally identical internally. I don't think "LC" as a name had any stigma associated with it in the way Performa did. It makes sense for them to badge engineer it for the different markets (edu vs. normal mac channel retail) (I mean, tbh that doesn't even make sense, but it's what Apple was commonly doing at the time) but it doesn't strictly speaking make any sense that they gave it its own case.

 

It's cute and aesthetically I'm glad it does, but.

 

Even the LC name got thrown around like confetti once the original little LC was out of the way, and it was numbers all over the place on *anything*. I'm normally one to loathe model designations that are chains of numbers (even when they're secretly very descriptive, looking at you sony https://en.tab-tv.com/?p=12043 ). I give Apple a pass because hey, there weren't THAT many of them in the range I like, and I'm an unapologetic Apple fangirl.

 

Some of the Q605's appeal to me is that weird place it sits. Yes, it's an LC475 but it's also so much better looking. It's almost an alternate-universe Mac in itself, and I think it's as much an expression of the simplicity of the original Macintosh as you could get at the time. The case was abandoned afterwards, and when I began collecting in about 2000 there was precisely *one* photo of the Quadra 605 discoverable online, and it was *wrong*. It hid the curves, and it was such a secret looking little odd thing I had to get my hands on it. Then I covered the 'net in Q605 photos and wrote the wikipedia article on it, and all was well with the world. 

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4 hours ago, Cory5412 said:

Architecturally, the 630 and 605 come directly out of the LC family.

At least for the 605 the basic form factor, port selection and expansion slot obviously come from the previous LC models.  However from the LC 475 and Quadra 605 hardware Developer Note:

 

“The architecture of the Macintosh LC 475 and Macintosh Quadra 605 computers is
based on the architecture of the Macintosh Centris 650.”

 

And the Centris 650 and Quadra 800 share a Developer Note! 

 

So maybe “Quadra Jr.” ;-) 

 

The Architecture Block Diagrams in these old hardware Developer Notes are fun to look at/compare. Lots of other good info too:
http://mirror.informatimago.com/next/developer.apple.com/documentation/Hardware/hardware2.html

Edited by Fizzbinn
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As is the Q630, ace of spades no less. Sorry Cory, you're trying to make sense in retrospect out of something with which Apple marketing was obviously clueless about in its time. If the badge says Quadra, it's a Quadra, if not, it ain't. Right, Dana? :lol:

 

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On 3/17/2020 at 9:33 AM, joshc said:

I opened up the Power Mac's PSU to find something a little different than I expected - a completely blown IC...

 

IMG_8646.thumb.jpg.8ae1e7c2dd0d9aed4f2f3d6733e56dbb.jpg

"Funny" enough, that's how my 8100 died. Except the PSU did blown the logic board with it :( 

 

For the LC475, try to "choke" it. Even with a good PRAM battery, this sometimes help. 

Idea is this : you power on the PSU, power it down and as soon as you heard the HDD slowing down you power it on again. Might need multiple tries. That's the trick to get it working without a PRAM battery by the way.

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  • 4 weeks later...

I sold the 8200 to @Paulie who is going to try replacing the PSU to get it working again.

 

The 475 still doesn't work, it needs further board-level diagnosis to seek out what's going on, it's beyond a PRAM-related issue in my opinion and currently a little beyond my skill level at this point but something worth investigating in the future as I would like a working 475 again.

 

The 630 is alive and well and I managed to re-attach the front bezel, I would like to do a CF conversion with it but will need to find an adapter that works with its early/crippled implementation of IDE.

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