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Questions tagged [pdp-10]

For questions regarding the DEC PDP-10 Computer.

3
votes
2answers
182 views

PDP-10 effective address calculation

How does effective address calculation work on the PDP-10? My understanding is that the instruction code contains an 18-bit address or offset, one bit for indirect, and a register code that's 4 bits. ...
8
votes
2answers
277 views

What are the differences between the various 36-bit computers from DEC?

I want to ask about the PDP-6 PDP-10 various implementations KA-10, KI-10, KL-10 DECSYSTEM-20 What are the differences between these? I'm not that interested in architectural differences, cache ...
5
votes
0answers
168 views

Is there a non-paging ITS for the PDP-6 or PDP-10?

In the late 60s, the Incompatible Timesharing System ran on a PDP-6 without any paging hardware (i.e. an MMU in modern terminology). See the Jargon entry for BLT, for example, which states (my ...
3
votes
3answers
238 views

What is the FPD bit on the PDP-10?

When an interrupt happens on a PDP-10 right, as on many other architectures you get the program counter pushed onto the stack. Actually, the program counter includes many status bits in the upper half ...
5
votes
1answer
576 views

How was the Microsoft PDP-10 8080 emulator developed? [closed]

Altair BASIC, the first version of Microsoft BASIC, was developed using an Intel 8008 emulator, modified to emulate an Intel 8080, running on a PDP-10 computer. This emulator was originally designed ...