IIsi schematic help

[Performa430]

I'm trying to get this IIsi board working again and am currently checking continuity. Not knowing where each of the pins on the 68030 go, I referenced the schematic. There is a spot I am hoping someone can interpret for me. As shown in the attached screenshot, a bunch of pins go to an area simply labelled "AO-31" and "Address." Can anyone tell me what this refers to so I can test continuity? Many thanks.

 

[robin-fo]

That‘s the address bus with its 32 bits/pins numbered 0…31

 

[luminescentsimian]

That's the schematic shorthand for saying those all stay together as a 32-bit wide bus rather than drawing out all 32 everywhere.

 

[Performa430]

Oh, so these don't run to a capacitor or IC? They don't need continuity checking?

 

[luminescentsimian]

The ADDRESS signals will run to multiple ICs but exactly how they get there isn't important on a schematic. On the schematic you'll see ADDRESS come in and some subset of the signals (A0 - A31) connect to pins on a chip. ADDRESS A0 anywhere in the schematic should be connected to ADDRESS A0 everywhere else, and the same for A1 - A31. Smaller/simpler ICs will have some sort of selection logic on front of them and only take in a subnet of the address bits, ignoring the rest.

 

[Performa430]

The ADDRESS signals will run to multiple ICs but exactly how they get there isn't important on a schematic. On the schematic you'll see ADDRESS come in and some subset of the signals (A0 - A31) connect to pins on a chip. ADDRESS A0 anywhere in the schematic should be connected to ADDRESS A0 everywhere else, and the same for A1 - A31. Smaller/simpler ICs will have some sort of selection logic on front of them and only take in a subnet of the address bits, ignoring the rest.

Okay, thanks for clearing that up. I appreciate the help!