Re: DECServer 200/DL board?
See also here for some better photos of a 5015575-01 board with the DB25 connectors attached: http://forum.maxiol.com/index.php?showtopic=5196 A DECserver 100 might be the best guess. On Mon, Jun 18, 2018, 9:49 AM Al Kossow via cctalk wrote: > Is this a 200/DL (RS423 data lines only) board? > > https://www.ebay.com/itm/352381870034 > > A normal 200 would have two large IDC connectors on the pcb for serial I/O > > >
Re: DECServer 200/DL board?
On 06/18/2018 01:00 PM, Antonio Carlini via cctalk wrote: > On 18/06/18 17:50, Al Kossow via cctalk wrote: >> Is this a 200/DL (RS423 data lines only) board? >> >> https://www.ebay.com/itm/352381870034 >> >> A normal 200 would have two large IDC connectors on the pcb for >> serial I/O >> >> >> > The DECserver 200/MC had 8 DB25 connectors on the back, one for each > RS232 connection. These connections had full modem control. > > The DECserver 200/DL had one 36-pin connector that broke out to 8 MMJ > connections. Only the data leads were present (no modem control). > > I don't know how the motherboards differed between the two models. I > wouldn't be surprised if the MC variant had 8 connections to the > motherboard. > > > I'm surprised the 200/DL didn't just put 8 MMJ connectors on the back > of the box ... would have saved space and been less of a hassle thirty > years later for people trying to run them! > > > I don't have any service information (that I know of) for the DS200 > unfortunately. > If no one can properly answer this question and it would help I have a bunch of 200/MC boxes sitting here and could one up to get a picture of the motherboard. bill
Re: DECServer 200/DL board?
I wonder if that's a DECserver-100 board. I remember seeing a box (I thought it was a prototype but I may be confused) with a fairly small PCB inside a much larger rackmount-sized enclosure, with 8 separate wire bundles going from connectors on the board to the MMJ jacks on the front panel. The history supposedly was that the original design used a box the size of the board, with those connectors either exposed on the front or brought out to standard front panel connectors. Ken Olsen decreed that the connectors weren't acceptable and introduced MMJ, requiring the box to be redone but the PCB was kept. Or so I was told anyway. paul > On Jun 18, 2018, at 12:50 PM, Al Kossow via cctalk > wrote: > > Is this a 200/DL (RS423 data lines only) board? > > https://www.ebay.com/itm/352381870034 > > A normal 200 would have two large IDC connectors on the pcb for serial I/O > >
Re: DECServer 200/DL board?
On 18/06/18 17:50, Al Kossow via cctalk wrote: Is this a 200/DL (RS423 data lines only) board? https://www.ebay.com/itm/352381870034 A normal 200 would have two large IDC connectors on the pcb for serial I/O The DECserver 200/MC had 8 DB25 connectors on the back, one for each RS232 connection. These connections had full modem control. The DECserver 200/DL had one 36-pin connector that broke out to 8 MMJ connections. Only the data leads were present (no modem control). I don't know how the motherboards differed between the two models. I wouldn't be surprised if the MC variant had 8 connections to the motherboard. I'm surprised the 200/DL didn't just put 8 MMJ connectors on the back of the box ... would have saved space and been less of a hassle thirty years later for people trying to run them! I don't have any service information (that I know of) for the DS200 unfortunately. Antonio -- Antonio Carlini arcarl...@iee.org
DECServer 200/DL board?
Is this a 200/DL (RS423 data lines only) board? https://www.ebay.com/itm/352381870034 A normal 200 would have two large IDC connectors on the pcb for serial I/O
