Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!watmath!clyde!burl!ulysses!mhuxl!ihnp4!zehntel!hplabs!sri-unix!bower@dca-ems From: bower%dca-ems@sri-unix.UUCP Newsgroups: net.micro.cpm Subject: UFDC-1 disk controller Message-ID: <17397@sri-arpa.UUCP> Date: Sat, 10-Mar-84 05:50:34 EST Article-I.D.: sri-arpa.17397 Posted: Sat Mar 10 05:50:34 1984 Date-Received: Tue, 13-Mar-84 07:57:35 EST Lines: 18 From: Maj Bower (HQ USEUCOM)I am sending this to the net since my cry for help went that-a-way. The UFDC-1 controller (mine purchased from Compu/time) DOES work with the Siemens FDD-221-5 80 track double-sided drive. The problem in my system came from relying on the controller documentation when writing a customized BIOS. BE ADVISED...Bit 5 of the control byte to the controller should be a zero for side zero...NOT a one for side zero as listed in the documentation. With the correct bit inserted, the board is FANTASTIC! The board is now configured with: Drive A - Tabor 3.25" - SS/DD - 12 mS steps - 384K Drive B - Siemens FDD-221-5 - DS/DD - 6 mS steps - 784K Drive C - Siemens FDD-100-8D - SS/DD - 6 mS steps - 636K With only a jumper change and drive swap, Drive B can change to a Shugart SA-400 SS/DD - 20 mS steps - 160K. A great controller board...if only the documentation were correct. Hal