Copper fingers on the SE/30 board?

[Cam]

Hello.
Just a question out of pure curiosity, but does anyone know what the copper 'fingers' on the SE/30 logic board (at location 1 L to I) are for? Or what they connect to? I'm thinking test points of some type, but that's just a WAG.

Thanks,

C

 

[retr01]

Do you mean the 15-pin ISA edge connector at the front side of the SE/30 logic board as circled in red?

 

[retr01]

@Cam, that edge connector on the SE/30 logic board is exclusively used to test the logic board at one of the Apple factories, like in Fremont, California, back in the day. It has no practical use for end users.

On the reloaded SE/30 board, that area lacked the edge connector and was used as optional PLCCs for the four ROM chips.

Paging @Bolle as he is the expert with SE/30 boards and probably will have more to say.

 

[retr01]

With the SE/30 reloaded board designed by @Bolle, that edge connector area is used for optional soldering in the four ROM chips or the PLCC sockets for those four ROM chips. See the area circled in red.

 

[Cam]

Yes, those are the ones. The test points makes sense given the number of them produced, and needing to be tested before distribution. I noticed they were missing on the Reloaded boards I had made.

Thanks for satisfying my curiosity!

C

 

[djc6]

Does anyone know the pinout of the 15-pin ISA edge connector ? I've searched online and can't find anything.

I thought it would make for good test points - I am troubleshooting an SE/30. So far I've figured out pins 8 and 9 are +5V and pins 10 and 11 are ground but thats it. Didn't find +12V, -12V, vertical sync, horizontal sync, video signal - I was checking for continuity between the pins on J12 and the 15 pin edge connector.

I'm hoping to connect my logic probe up to check some signals.

 

[Bolle]

There are no video signals present on the edge connector. It's only three VIA pins (one of them used to put the machine into test mode) and one of the serial ports (for the test equipment to communicate with the board). Also obviously power/ground as you already figured out.