>My conclusion is the opposite -- there is an internal terminator at the >controller since they make no mention of adding one at that end. But only a >schematic would resolve the issue.
These controllers (more accurately termed "Host Adapters", or "Host Bus Adapters") usually have an "active termination" LSI chip. Many motherboards incorporate a chip of this type as a functional part of their SCSI LSI controller chips. These chips actually detect the presence, or absence, of a terminator, and provide termination, if required. The more primitive controllers have physical resistor packs, so-called 220/330 R-packs (a 220 ohm pull-up to +5 volts, and a 330 ohm pull-down to zero volts, the +5 volts "return", on each and every SCSI signal line), and require that the user insert or remove these R-packs. -- PowerBooks is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Enter To Win A | -- Canon PowerShot Digital Cameras start at $299 | Free iBook! | Support Low End Mac <http://lowendmac.com/lists/support.html> PowerBooks list info: <http://lowendmac.com/lists/powerbooks.shtml> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive: <http://www.mail-archive.com/powerbooks%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
