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Having bought some Perkin Elmer 550 terminals I decided I needed something to connect them up to. When my place of work scrapped their Perkin Elmer 3210 computer 25 years ago I rescued the control panel. Well 25 years later and a Raspberry Pi can fit into the console so I decided it was time to...

Anyone have a service manual or schematic for a Perkin Elmer 550 Terminal please? I'm about to restore one and it would make it a lot easier.

Been trying to do this for a couple of days with no luck so wonder if someone can help me please.? I have a PDP11/73 running RT-11 5.3. (RT11XM.SYS). I am using a M8043 DLV11-J four port serial card (i.e. channels 0 to 3) with the console connected to Channel 3. From Fortran 77 I have no...

I'm after a bit of advice please. Are the ribbons for the Decwriter 1,2 & 3 the same. i.e. Will ribbons described as for the LA36R work on the LA120 (Decwriter III).

I just got this PDP11/05 from work. It was stored in damp conditions so needs a lot of TLC.

I was given this QBUS board today but have googled it and cannot find any info on it. It is a 68000 based board with memory, Eproms & I/O. Would like to know what it was used for and if it would be compatible with any PDP11 Qbus cards. Here's some pics:-

Last week I rescued another computer from the skip (dumpster) at work. This time it was a PDP11/23 Plus. I don't think it has been turned on for 20 or so years but I've just tried it and it booted up first time. Fans are a little bit noisy and one of the floppy drives don't work properly but was...

I'm using RT-11SJ V05.01 on a PDP11/73 I'm trying to use Logic disks but the Mount command won't mount my .dsk file to a LD device. I think the problem is that I don't have LD.SYS. I've looked everywhere for a LD.SYS file but can't find one anywhere. If anyone knows where I can download LD.SYS...

Just joined the fun so thought I would introduce myself and show you my PDP11. Where I work we had a swipe lock system that was run by a PDP11/73 until 5 years ago when it developed a fault and was replaced by a new system. The other day I was in the computer room and found that it had Scrap...