RM Nimbus 186
|These computers were
produced by Research Machines (www.rm.com) for educational
purposes. It appears that they did all the development
and building of the Motherboard and I/O boards. The
boards seem to be built according to the needs of the
computer that they are going to be used in, as boards of
the same part number are not all the same, there are
additional chips and connectors on some of them.
The mouse that they use seems to be specific to these computers as a normal serial mouse will not work on them. They all have a phone type printer and Piconet connector on the back but some also have a 25 pin parallel printer outlet as well, this is a ribbon type connector and underneath that there are two outlets one 5 volt and one 12 volt I presume these are power supplies for the printers concerned.
|This one was actually found by a friend in a skip
outside a primary school
FDD 3.5" 720K
RM Nimbus colour monitor model no. RM1404 which connects via an 7/8 pin din cable. 8 pins at the CPU end and 7 pins at the monitor end.
RM Nimbus keyboard 5 pin din connector
RM Nimbus mouse (Manufactured by Logitec) Model no. P8-2F-RM
Citizen 120D dot matrix printer which connects via a 25DMale - phone type connector.
RM Nimbus 186 20MB
|This one is very similar to the one
above, except for the fact that it has a hard disk and a
slightly larger memory. The hard drive is a Seagate ST-
225N which is a 20MB SCSI drive, although the connector
on the hard drive has 50 pins they only use 34 of them.
The extra memory is on an additional expansion board
which is connected to the motherboard by a single row of
The Operating system on this is DOS 3.10 and it has got Windows 3.0 installed, which is apparently a heavily modified version, presumably so that it will run on a 186. There are also some of the old Primary school educational type programs on it as well, such as Paintspa which is a painting program , and Newsdesk which is an editing program that allows you to set-up a page to print like a newspaper.
|This computer was given to me by a young lady that
works for RM who said that she no longer needed it.
CPU AMD/Intel N80186
HDD Seagate ST-225N 20MB
FDD 3.5" 720K
|This is the inside of the RM 186 20MB. In the centre at the front is the ST-225N 5.5" hard disk with the ribbon for the floppy disk going over the top of it. At the rear on the left is the ribbon that connects all the I/O cards which you can see a bit clearer in the photo below, it looks as though it can take up to 4 cards on it.|
For more detailed information part numbers etc. click here
Please e-mail me if you have further information or any criticism of the details shown.
Last Updated 13th September 2002