MIT PDP-10 'Info' file converted to Hypertext 'html' format by Henry Baker

PDP-10 Machine Language.

This file attempts to teach the machine language of the PDP-10 computer. It describes what instructions are available and what they do. The conventions of the assembler in which PDP-10 machine programs are usually written are another subject; see *Note MIDAS: (MIDAS).

The machine language itself:

Introduction
Addressing memory. Formats of memory words.
General instruction formats.
Terminology.
Effective address computation.
Full word data transfer instructions
Stack instructions.
Half word data transfer instructions.
Conditional jumps on signs and comparisons.
Fixed point arithmetic operations.
KL-10 double precision fixed point.
Floating point arithmetic operations.
Shift and rotate instructions.
Byte extraction instructions.
Conditional skip on bit test instructions.
Bitwise logical operations.
Format of PC saved by subroutine calls.
Jumps other than arithmetic conditionals.
Obsolete subroutine call instructions.

Program examples:

Complete simple program.
Simple terminal output.
Simple terminal input and output.
Read a line, separate even- and odd-numbered chars.
Separates vowels from consonants too.
Another way of writing the previous example.
Reads arithmetic expressions, prints results.
Reading and writing files.
Converting input to SIXBIT, or to filenames.
Buffered input from files.
Buffered input, discarding padding at end of file.

I haven't got the time to test these examples. That means they may have bugs. Sorry. But it's a useful exercise to test one and, if it doesn't work, fix it and tell BUG-INFO.

Using DDT to debug programs or try out instructions.