> On Jan 3, 2016, at 7:20 PM, Christian Gauger-Cosgrove
> <[email protected]> wrote:
>
> ...
> That's neat learning the history of it. I didn't know why DEC had
> included a FORTH RTS nor what the SDA.4TH program actually was (I had
> guessed that ODT.4TH was related in some what to ODT). It appears that
> the SDA source is in UNSUPP$:, namely SDA.FTH. I don't see the ODT
> source however.
That reminded me of something I had forgotten: SDA reads its help messages out
of its own source file, so the source file is included in order for the help
command to work.
ODT doesn't need this; it doesn't have a help facility like that. Here is the
header from the source; that lists what's different in comparison with ODT.BAS
(which is documented in the standard RSTS manuals).
paul
\
\ O D T . F T H
\
\ This program is a FORTH implementation of the standard RSTS utility
\ ODT.TSK, with some enhancements. The additional features are:
\
\ 1. Double-length arithmetic -- all arithmetic (addressing
\ and expression evaluation) is done in 32-bits
\ 2. Access to all of memory -- you get both read and write (CAUTION!!!)
\ access to all of memory (via .PLAS), not just to lowcore.
\ 3. Interpretation of directory links for NFS access. The D command
\ (was Control/D in ODT.TSK) works no matter how you're accessing
\ the directory.
\ 4. New K command. The K command takes a DCN, and prints the
\ corresponding byte address. Alternatively, you can type K
\ when a location is open; this causes the first word of the
\ DCN addressed by that word to be opened. Handy when following
\ DCN pointers in NFS access to directories.
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