Classic II in an SE?

[MinerAl]

The logic board connector is the same (looking). The ports even line up with the holes in the bucket. Any electronic reason this wouldn't work?

 

[volvo242gt]

If the power requirements are the same, then it probably would work. That said, it'd then become a somewhat crippled 32-bit clean SE/30.

-J

 

[uniserver]

I think a classic II in a se, wold be way cooler then a regular se

The only thing i can think of is the wire pinout might be different, because we know the internal speaker connects to the A/B instead of the MB.

 

[MinerAl]

I was actually eventually thinking a SE/30 in a pretty Classic Case...

You're right about the pinouts being different... If I have to build an adapter, that would be annoying.

 

[Gorgonops]

Don't the Mac Classics have software-adjustable screen brightness instead of a brightness knob? It seems like that would be a significant barrier to putting an SE board in a Mac Classic case. (In principle I imagine it wouldn't be a problem to go the other way, other than the software brightness control panel would no longer work unless you swapped the analog boards as well. Obviously you'll have to adapt the wiring for the remaining connections accordingly.)

 

[MinerAl]

Yeah I really can't find any pinout info for any post-Plus compacts' analog board -> logic board connector.

I can verify that an SE/30 board plugged into a Classic II chassis makes weird noises and doesn't boot at all...

Hope I didn't blow anything up 8-o (no sizzling or magic smoke, just weird noises from the speaker)

 

[uniserver]

lol

" smoke test "

 

[genie_mac]

can verify that an SE/30 board plugged into a Classic II chassis makes weird noises and doesn't boot at all...

That doesn't sound good!

I had the same idea some time ago and found this during my research: it's for a Classic not Classic 2. The Classic 2 is 10 pin as well so it must be different, but just for reference:

Mac Classic

What are the pinouts for the internal power connector at location J12 on the

Macintosh Classic logic board?

Following are the pinouts:

Pin Description

--- -----------

1 +12 volts

2 + 5 volts

3 + 5 volts

4 /VSYNC

5 /HSYNC

6 VIDOUT

7 Sound

8 -12 volts

9 PWM (Brightness control signal)

10 Ground

11 Ground

12 Ground

13 Ground

14 Ground

_____________________________________________________________________________________

Mac SE:

This article is a chart of the pin assignments for the Macintosh SE power

supply connector.

Pin number Signal Color of Wire

1 Ground Black

2 Ground Black

3 Ground Black

4 +5 V Orange

5 +12 V disk Yellow

6 -12 V Green

7 Ground Black

8 Ground Black

9 +5 V Orange

10 +12 V sweep Red

 

[MinerAl]

Super.

Love to see i sent power up the grounds and vice versa...

They are both 14 pin though. What do the other 4 pins on an SE do?

 

[uniserver]

well throw it back into the SE and see if it works… might still be fine?

 

[MinerAl]

It's fine. So it's not fatal to plug an SE/30 logic board straight into a Classic II analog board, just very stupid.

Looking at the pinouts for the SE that Genie Mac supplied, the Classic 14-pin list is what I was talking about, but II think the SE's 10 pins are from the removable power supply to the analog board, not the 14 pins from the analog board to the logic board (video has to go up somehow).

I'd still like to see what the 14-pinouts for the SE/30 are; it should be easy or at least possible to adapt.

 

[genie_mac]

SE and SE/30 use the same logicboard power connector. I have tried this myself with SE and SE/30 analog and logic boards. I have now checked with the Apple Guide to the Macintosh Family Hardware as follows:

Signal assignments for the power and video connector from the analog board

to the logic board in the Macintosh SE and Macintosh SE/30 computers:

:

1 GND Ground

2 GND Ground

3 GND Ground

4 GND Ground \

5 GND Ground

6 -5V -5 volts

7 -12V -12 volts

8 GND Ground

9 VIDOUT Video output

10 /HSYNC Horizontal synchronization

11 /VSYNC Vertical synchronization

12 +5V +5 volts

13 +5V +5 volts

14 +12V + 12 volts

Strange, the information I posted in my last message was obtained from the Apple support site http://C:\Mac\Documents\Hardware\Macintosh SE Power Supply Connector Pin Assignments.htm. I assume the Apple site is wrong then. Could an admin please edit my last post to remove this info / could someone confirm the validity of the Apple Guide to the Macintosh Hardware?

Sorry about the confusion.

 

[MinerAl]

Awesome! Thanks!

So:

SE (& SE/30) Classic (& CII)
Pin Description Pin Description

--- ----------- --- -----------

1 Ground 1 +12 volts

2 Ground 2 +5 volts

3 Ground 3 +5 volts

4 Ground 4 VSYNC

5 Ground 5 HSYNC

6 -5 volts 6 VIDOUT

7 -12 volts 7 Sound

8 GND Ground 8 -12 volts

9 VIDOUT 9 Brightness control signal

10 HSYNC 10 Ground

11 VSYNC 11 Ground

12 +5 volts 12 Ground

13 +5 volts 13 Ground

14 + 12 volts 14 Ground

Looks like they reversed it and switched a ground for sound, and a -5V for the brightness control. All you'd need is the molex connectors and a little wire to make a handy adapter.