Octal Memory Dump Revised
5,8-36

Paul Hammond, Woods Hole Oceanographic Institution,
Woods Hole, Massachusetts

The Octal Memory Dump on Teletype is a DEC routine
(DEC-5-8-U) which dumps memory by reading the switch
register twice; once for a lower limit and again for an upper
limit. It then types an address, the contents of the program
and the next three locations, issues a CR/LF, then repeats
the process for the next four locations. This leaves the
right two-thirds of the Teletype page unused. The 7810
instructions occupy two pages.

This revised routine uses the complete width of the Teletype
page and occupies only one memory page, using less paper
and two less instructions. Now an address and the contents
of 15 locations are typed out before a carriage return.

Catalog: November 1969