SCSI for Dummies Thread - How to properly use SCSI

[trag]

Found it, I think...

Accelerate Your Mac! - Converting a PC adaptec SCSI card to mac

That's the article I wrote way back when. By today's standards, way too much detail on the soldering and probably some of the (soldering) details are bad advice. But it is more than 25 years old, so...

But there was also discussion in the forum regarding specific cards and firmware versions of the 2940UW. Also, some times there would be a front page item from Mike when I reader reported converting a newer version of the card.

 

[volvo242gt]

Jeff,

Ah, ok. So, that info may be found in one of the more recent scrapes of the site done by the wayback machine... I didn't check to see if the forum had been archived or not, though.

 

[Realitystorm]

The Quadra 900 and 950 did indeed have two separate SCSI busses with each one having their own 53C96 controller.

Technical Note HW540: SCSI Port Q&As: The Macintosh Quadra 900 is the first Macintosh computer to provide a separate, internal SCSI bus. This bus is physically isolated from the external SCSI bus and must also be properly terminated. The cable provided with the machine includes all the termination necessary, so ALL internal devices must have SCSI termination removed before connecting to the internal Macintosh Quadra 900 SCSI cable. If extra termination is supplied it may cause intermittent hardware failures as well as physical damage to the device.