SSC firmware - incorrect handshake?

["Ferdinan Meyer-hermann" <ferdinan.meyer-hermann@a2central.com.remove-7jb-this>]

While playing around with the Apple on this BBBS I found out that the first
char of every line gets lost if the Apple needs to scroll. To get reliable
operation, I needed to slow the port speed down to 300bps, which is too slow.
I do use handshaking and the handshake seems to work correctly, i.e. if the
SSC is not enabled, no data will be sent to the Apple. But as soon as it's
enabled (I used the firmware routines in my terminal program). It raises the
handshak~e linse permanently. I fed a continous stream of data @19200 baud
into the apple, nearly half of it got lost, but the handshake lines were
asserted all the time. 
Is this a known misbehaviour of the SSC's firmware?
Where can I find information about direct access to the SSC's hardware?
Is there a good terminal program which supports high baud rates? I only found 
some very strange programs, some were running in HIRES, etc.
I got none of all I found to do anything useful.

Thank you for any help!

Ferdinand Meyer-Hermann
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