Date   : Sun, 21 Oct 2007 17:37:27 +0100
From   : julesrichardsonuk@... (Jules Richardson)
Subject: ACB4000 on modern SCSI adaptor ?

Pete Turnbull wrote:
> On 21/10/2007 16:34, Andrew Benham wrote:
>> However is there a hardware challenge as well ?  I seem to
>> recall a message on the list where someone had smoke coming from
>> the 50-way SCSI cable - but was this as a result of connecting
>> the ACB4000 to a modern SCSI adaptor, or was it as a result of
>> connecting a modern SCSI disk to the 1MHz bus host adaptor ?
> 
> Almost certainly neither.  Smoke from a SCSI cable is because something 
> on it is providing TERMPWR but the cable is upside-down on one 
> connector, and therefore TERMPWR is shorted to ground.  Pretty much 
> everything else on the cable is open-collector and won't be harmed by 
> being upside down or wrongly connected.

Hmm, I think there was an issue with trying to connect *some* SASI-type 
devices to a SCSI HBA, as some devices grounded the unused even-numbered pins 
  rather than leaving them unconnected. I'm pretty sure this doesn't apply to 
the ACB4000, though.


cheers

Jules