Z80 CP/M Forth & loading code from disk

I'm new to Forth and thought it would be a useful addition to my older
8-bit 
machines.  I've tried a few Forth's from the Walnut Creek CP/M CD, but
can't 
seem to find one that allows me to load Forth code that was previously
saved 
to a disk file (with a generic text editor).  The closest I've found was 
Forth83 (8080 Forth 83 Model V 2.1.0 from June 84) that actually mentions 
files in the docs.  All the others talk about disk blocks - which cause 
screwy behavior (I guess nobody got around to connecting the early Forth's

to the disk calls in BDOS).

I think I must be missing something that's obvious.  Because, it seems to 
me, just loading a text file from disk should be a very simple thing.