chuck@Morgan.COM (Chuck Ocheret) (09/28/90)
Which pin is really pin 1 on the 50 pin centronics SCSI connector? I just bought a CDC Wren IV drive for my Mac which I am placing an an enclosure with a power supply. The next thing I have to do is make the cable which connects the drive to the 2 gaping holes in the back of the enclosure. I bought some appropriate 50 conductor ribbon cable. I bought the keyed 50 pin interface connector which will attach to the disk drive's PC board. Finally, I bought two 50 finger female centronics connectors which will attach to the back of the enclosure to allow me to hook standard Apple SCSI interface cables. Here's the catch... When you look head on at the female centronics connectors I bought the fingers are numbered as shown... -------------------------------------- \ 25...............................1 / \ 50.............................26/ ---------------------------------- However, when you look head on at the male connector on the SCSI interface cable which I will use to connect the disk to my CD ROM the fingers are numbered as shown... -------------------------------------- \ 25...............................1 / \ 50.............................26/ ---------------------------------- Clearly, one of these is wrong (flip one over to plug it into the other and the numbers don't match!). Which is the right one? Since the connector to the disk PC board is keyed, I cannot just flip it over if I make the cable wrong. Help! ~chuck -- +--------------------+ Chuck Ocheret, Sr. Staff Engineer +---------------+ |chuck@APT.Morgan.COM| Morgan Stanley & Co., Inc. |(212) 703-4474 | | Duty now ... |19th Floor, 1251 Avenue of the Americas|for the future.| +--------------------+ New York, N.Y. 10020 USA +---------------+