brett@smosjc.UUCP (Brett Coon) (07/10/90)
I tried setting up my A2286 AT Bridgeboard last night, and realized that I somehow managed to lose the cable that connects the Bridgeboard with the 5.25" disk drive. I managed to find a cable and the appropriate connectors, but when I connected it together, the Bridgeboard wouldn't boot. According to the manual, the AT cable is supposed to have a few of the wires twisted, which (hopefully) explains the problem. Could someone please tell me which wires get twisted so I can fix my cable? Thanks, -brett -- |Brett Coon | uunet!smosjc!brett | |S-MOS Systems, Inc. | "You like 'em, anchovies?" | |San Jose, CA | -Runaway Train |
djh@metaphor.metaphor.com (Dallas Hodgson) (07/14/90)
In article <294@smosjc.UUCP> brett@smosjc.UUCP (Brett Coon) writes: >I tried setting up my A2286 AT Bridgeboard last night, and realized that I >somehow managed to lose the cable that connects the Bridgeboard with the 5.25" >disk drive. I managed to find a cable and the appropriate connectors, but >when I connected it together, the Bridgeboard wouldn't boot. According to >the manual, the AT cable is supposed to have a few of the wires twisted, which >(hopefully) explains the problem. Could someone please tell me which wires >get twisted so I can fix my cable? The twist on the cable is a convenience to allow both drive A: and B: to be drive-select dumpered identically. If you use a flat cable, you can move one of the drive select jumpers to get the desired effect. This goes all the way back to TRS-80 days when the long 4-drive floppy cable connecting the Expansion Interface to the drives had the select pinouts modified at each connector. If the jumpers aren't right, nothing bad will happen - either the drive won't select, or it will select simultaneously with a different drive.