Hi Brad,
I found these two links.  I hope they help.
< 
  -----Original Message-----
 From: cctalk [mailto:cctalk-bounces at 
classiccmp.org] On Behalf Of Brad H
 Sent: Friday, May 20, 2016 10:31 AM
 To: General Discussion: On-Topic and Off-Topic Posts
 Subject: MSI 6800
 Hi there,
 I have acquired an MSI 6800 (SS50) computer and am trying to figure out how to get it
going.  I am reaching out everywhere hoping to
 find someone with knowledge of these as I have searched around extensively and cannot
find a manual.
 With a null modem cable connected to a PC I can get a response from the computer by
typing things or resetting it, but the output is
 garbled.  I know the baud rate but at present have no way to determine the other settings
like bit, parity, etc.
 Any help/advice would be appreciated!
 Brad
 Sent from my Samsung device