On Mon, May 11, 2020 at 4:19 PM Peter Noeth <petern0...@gmail.com> wrote:

> According to my information, version R2C1D.BX was some kind of development
> version, undocumented as far as I can tell.
>

This document seems to have a "developers version supplement" at the top:
https://ftp.whtech.com/club100/doc/cleurom2.pdf

The major differences of the D version seem to be some TDD commands for the
ROM2 command mode (RUN, LOAD, SAVE, and KILL)  and some additional entry
points into ROM2.

The disk commands in particular look useful, as I do a lot of
co-development between a modern laptop and my M102; previously I'd had to
pop back and forth to TSDOS to do loads and saves, then pop back into
Cleu.  With this version a user ought to be able to stay in Cleu during
edit/load/debug cycle.

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