[Coco] SLENB line behavior

[Barry Nelson]

I am not sure that the system would determine that, as SLENB is a input. Wouldn't wither multiple devices could share SLENB depend on those device's output circuits? In other words, if I attach a device to the system that forces SLENB high with a low impedance, then no other device could pull it low.

> RETRO Innovations go4retro at go4retro.com 
> Mon Sep 19 22:18:15 EDT 2016
> Maybe it's best to get some clarification on the usage of the line.
> 
> I assumed SLENB is to be considered a "wired-or" line.  Namely, any 
> device on an MPI can pull the line low if needed, but all devices are to 
> pull it weakly high, so that multiple devices can share the line.
> 
> Am I considering it correctly?  Or, is it designed so that only 1 
> cartridge can support SLENB in a system?
> 
> Jim