Hi all, after searching the archives for info on osi and m/a comm computers, i found this list and subbed to it. i am into mini computers and ham radio as well as most tech fields. currently i'm looking for info and pinouts/schems on the osi boards. i have some spare boards form a osi m/a-comm 220c and a oem of the same but am trying to get a "dbi db80" working. the db-80 uses all osi drives,powersupplies and boards, except for the two cpu/terminal/comms boards labeled "dbi inc db1" the comp also has a ohio memory systems 10" hard drive in it. the machine did work in the early 90's then a strange problem started" upon a floppy command the head would go to the end of the lead screw and the stepper would not stop! now after 6 years in storage i tried the spare boards on a backplane and nothing (great more work to do). i thought the drive might be bad also so i searched the archives on this list and read about the serial/parallel interface that osi used - a-ha! that why osi dosnt use the read data pin on the siemans drive. the drive did head load and step ok when i tested them last week and i got a good index sensor pulse so perhaps the controller was going. if needed i'll recap and replace all the chips on the cards (i hope the eproms (rom) are ok. might anyone have docs on the osi boards? or is thier any osi owners.collectors on the list anymore? if so i'll send the board numbers later. 73 DE N8UHN Bill __________________________________________________ Do you Yahoo!? Yahoo! Web Hosting - Let the expert host your site http://webhosting.yahoo.com