Figure out how to build the 1965 DECtape

[larsbrinkhoff]

The README currently says:

Figure out how to build the DECtape version mentioned in the 1965 Monitor manual. There appears to be two versions: one for paper tape and one that seems to be self-contained on a DECtape.

[larsbrinkhoff]

More info in this comment:
PDP-6/JOSS-II#4 (comment)

[larsbrinkhoff]

The Monitor manual says:

So it appears there should be a shadow loader of some sort. I.e. a DECtape bootstrap at core location 0, which is normally shadowed by fast memory (the accumulators). Presumably it would read block 0 into memory and run it.

Maybe block 0 can be a copy of DECDMP which is put in high memory directly, or maybe block 0 will be a secondary bootstrap which reads another block containing DECDMP.

[larsbrinkhoff]

As for the paper tape version, I figure that is what is built by default.

[larsbrinkhoff]

Correction, a PDP-10 hardware read-in mode paper tape is built:

        RIM10B                  ;MAKE BINARY TAPE IN READIN MODE

The JOSS manual says:

This is an older PDP-6 paper tape bootstrap. Maybe the RIM2 format?