AT&T 6300s

(My apologies if this is a double post, but I'n not sure it sent on the first try.) The 6300's had a number of oddities. As mentioned by others, the video was non-standard and power to the monitor came through the video cable, not through a separate line cord. This was true of _most_ units, as where I worked we had some 6300's with separate EGA cards and regular EGA monitors. You could also remove the standard card (while also disconnecting the monitor power line and setting some jumpers) and use your own card. Many programs (e.g., Lotus 123, Borland Reflex) had special video drivers for the 6300. The keyboard used a 15 pin D connector. IIRC, Keytronic made a replacement keyboard for the 6300. The clock/calendar stopped working correctly at the start of 1988 (IIRC). You could get a CLOCK.SYS device driver to set the proper year. Most of the hard disk drives I saw were standard half height 5 1/4" Segate models (225's ?). The floppy disk controller was integrated into the mother board. It could be disabled, but that took some doing. On a number of our machines, I added a 2nd floppy -- a 3 1/2" -- in addition to the 5 1/4". This was a bit of a trick, as the case only has bays for two drives (1 floppy, one HD). What I did was mount the HD internall. You could only do this if all the cards were half length, as the drive sat over some of the unused card slots and against the ends of the half length cards. I used aluminum cut from a cookie baking sheet to make a support bracket. Putting the HD internal freed up the second drive bay for the 3 1/2" drive. I also used a drive controller from JDR Micro Devices that had its own BIOS that coexisted with the built-in controller and added the extra drive after the internal ones, making the 5 1/4 drive both A: and B:, the 3 1/2 C: and the hard drive D:. The expansion slots were on a board that was mounted back-to-back with the mother board. Taking off the top of the case exposed the power supply and card slots. There was a separate cover plate _under_ the case that covered the mother board. Bob _________________________________________________________________ Want to check if your PC is virus-infected? Get a FREE computer virus scan online from McAfee. http://clinic.mcafee.com/clinic/ibuy/campaign.asp?cid=3963