Tag Archives: pdp10

MUD from Tape

In my last journey towards MUD I found that the source files in the zip archive from Stanford are incomplete. I managed to get hold of a key missing file as scanned hardcopy, but this still had errors in it … Continue reading

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Getting in the MUD

Now that TOPS-10 and BCPL is fully operational, the next step is to wade into the MUD. MUD is provided as a set of source files in a mix of BCPL and MACRO-10. Having downloaded the tape from GitHub and … Continue reading

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Fixing BCPL

The BCPL compiler to executes successfully and the BCL: ersatz device exists in the monitor but the compiler seems to be producing code which is executing at an illegal memory address. So how do we fix that? Not being familiar … Continue reading

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Tops-10 FAQ

I have added a new Tops-10 FAQ page with questions that I had as I got my system up and running for BCPL and MUD1.

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Installing BCPL

Having completed the pre-requisites for BCPL, it should be a simple matter to install BCPL using the BUILD.CTL job that is included with the BCPL files on tape. First, boot Tops-10 with the amended system that was generated with MONGEN … Continue reading

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Essex BCPL pre-requisites

Having restored the BCPL tape, before you can properly install BCPL you must undertake some pre-requisite work. Fortunately the pre-requisites are stated in the BUILD.CTL file that ships on the tape and boil down to three things: Check the code … Continue reading

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Essex BCPL restore

Now that I have a working TOPS-10 environment, in order to truly start the journey to MUD the first step is to install the Essex university BCPL compiler from the 1970’s. This compiler was lost for many years, and even … Continue reading

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May the Fortran be with you.

If you have your own Tops-10 system up and running you might want to do something useful with it. So, the first step for me was to install the Fortran and BASIC programming languages, partly to prove they would work … Continue reading

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Configuring PDP10 Tops-10 for online use

I installed my very own PDP10 Tops-10 system up and running on simh, but to make it work like a 1970’s timesharing system I needed to configure it to support remote users on “teletypes” attached to the system. Of course, … Continue reading

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Building a Dec PDP10 using simh

The Dec PDP10 is a large mini/mainframe computer from the 1970’s. For me the most famous aspect of the PDP10 is that it was the original computer upon which Colossal Cave Adventure, Dungeon (aka Zork) and the original MUD were … Continue reading

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