John,
.
Got the file MKZ3/37.SUB.  Looks good.	I'll have to get EX.COM or use 
something else.  This will really help.
.
Sorry about the confusion with SYSNDR.ASM.  I got my original files from
so many places, I forgot which came from where.  The ASM file came from
Z3Z1002.LBR.  I am Xmodem mailing it so you can assemble.   You can get 
MKDIR.COM and EDITND.COM, both on GEnie, to maintain your named directories.
.
The Terminal Capabilities (TCAP) info is also in the mail.  Update your
SYSENV.LIB with these codes and reassemble.  Or, you can download 
Z3TCAP26.LBR for the same information.	I never found TCSELECT.COM to
work with Z3TCAP.  If you have the info, you don't really need it.
R for the same information.	I never found TCSELECT.COM to
w