I found a reference to Tera Term on a Mecrisp Forth website. It mentioned that it has a BASIC-like programming language built in so I got it here.
It is extremely full featured and it seems to run very well with Magic File Manipulator so I thought I would report my findings.
At first it looked like it did not support XMODEM transfers. The help mentioned that it could however so I looked in the TERATERM.INI file and changed these two controls
XmodemBin XmodemRcvCommand from 'off' to 'on'.
After that the XMODEM menus were not grayed out and it works great.
; XMODEM option (checksum/crc/1k) XmodemOpt=checksum ; Binary flag for XMODEM Receive and ZMODEM Send (on/off) XmodemBin=on ; XMODEM receive command XmodemRcvCommand=on
NOTE on MFM:
I had been using the MFM program with hyper-terminal and had my RS232 configured on the TI-99 in the default 7 bits, ODD parity, 1 stop bit configuration.
Somehow it worked even when I transferred binary (program) files. (??)
But, I saw a lot of strange things on my terminal when I was controlling MFM at the TI-99 console.
>>I DIDN'T REALIZE THAT MFM ECHOS MENUS OVER RS232. DUH!<<
So for those who might be using MFM for the first time, set your serial port to 8 BITS, NO PARITY, 1 STOP-BIT and you can control MFM from the comfort of your PC.
"Stupid is as stupid does"