Lou - N2MIY
Veteran Member
Folks,
Paul was interested in an old project of mine where I packaged Tandon TM100 drives in an enclosure and made a cable to use them on my Robin (VT180) in lieu of a real RX180. The cable is simple. The cable/connector pinning of the DC37 to 34-position cardedge connector on the back of the drives is 1 to 1. That is, DC37 pin 1 connects to pin 1 on the cardedge connector, 2 to 2, etc. It seems a little counterintuitive since the row of pins on the DC37 are numbered sequentially from one end to the other along each row while the cardedge connector switches back and forth from side to side. This precludes use of ribbon cable and IDC connectors. Dig out the pin crimper!
This project is documented in this album : http://www.vcfed.org/forum/album.php?albumid=375&attachmentid=39826
Will was interested in an enclosure I built where I placed an M9058 in an external enclosure with the drives instead of in the qbus backplane. Although the M9058 has a dec backplane cardedge connector (usually plugged into the BA123 backplane), it only takes +5V and does nothing else. It can easily be placed elsewhere as I have done here. I then used all-50-pins-through SCSI cables to connect from the RQDXn to the external chassis. I should note that Malcolm's RQDXn breakout board is much more versatile, but I built this thing almost ten years ago (same with the homemade RX180).
This project is documented in this album : http://www.vcfed.org/forum/album.php?albumid=376&attachmentid=39832
Lou
Paul was interested in an old project of mine where I packaged Tandon TM100 drives in an enclosure and made a cable to use them on my Robin (VT180) in lieu of a real RX180. The cable is simple. The cable/connector pinning of the DC37 to 34-position cardedge connector on the back of the drives is 1 to 1. That is, DC37 pin 1 connects to pin 1 on the cardedge connector, 2 to 2, etc. It seems a little counterintuitive since the row of pins on the DC37 are numbered sequentially from one end to the other along each row while the cardedge connector switches back and forth from side to side. This precludes use of ribbon cable and IDC connectors. Dig out the pin crimper!
This project is documented in this album : http://www.vcfed.org/forum/album.php?albumid=375&attachmentid=39826
Will was interested in an enclosure I built where I placed an M9058 in an external enclosure with the drives instead of in the qbus backplane. Although the M9058 has a dec backplane cardedge connector (usually plugged into the BA123 backplane), it only takes +5V and does nothing else. It can easily be placed elsewhere as I have done here. I then used all-50-pins-through SCSI cables to connect from the RQDXn to the external chassis. I should note that Malcolm's RQDXn breakout board is much more versatile, but I built this thing almost ten years ago (same with the homemade RX180).
This project is documented in this album : http://www.vcfed.org/forum/album.php?albumid=376&attachmentid=39832
Lou
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