>> I see a second ribbon connected to the MB that goes to the CD. This >> socket on the second ribbon looks like a 'NORMAL" ATA, maybe this is a >> more advanced form of SCSI or could it be ATA. > > The connectors on the motherboard are ATA; the connectors on the add-in > card are two varieties of SCSI.
The Beige G3 only offered a maximum of 16.67 Mbps over the 40-wire/40-pin ATA interfaces. The cables' wire spacing is 0.0500". The B&W and all later G3 (and G4) offered, variously, 33 Mbps, or higher, over the 80-wire/40-pin ATA interfaces. The cables' wire spacing is 0.0250". This cable specification is identical in every respect, except for the number of wires/pins, as the UW-SCSI cables, which are, variously, 50- or 68-wire/pin. The UATA ports on B&W G3s, and later models, are all 80/40, although the HD bus is usually rated twice the throughput as the optical bus. 50- and 68-wire cable stock is very easy to find. More difficult to find is 80-wire. I have only seen one instance where a roll of this cable was available at the "usual suspect" Silicon Valley surplus sellers. The 80/40 cable connectors, which are made in three colors, each with different shorted or open pins (Host, Master and Slave), are equally hard to find. -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/g3-5-list
