[comp.os.cpm] Applicard and Super Serial Card

marwood@dmc-crc.arpa (02/27/87)

Thanks for your comments re- the 9600 baud problem.  From what you say, it may
be impossible to run the Applicard at this speed, if the screen is going to be
updated.  I was thinking about two possible solutions, using a direct serial 
I/O from the Applicard bus or writing some sort of buffered driver for the
Super Serial Card.  Both of these would be fairly long term projects.  
However, if the screen is the limitation, the first solution may not work. I 
was also wondering whether some sort of block mode transfer to screen might be 
possible.  One line at a time would presumably be more efficient than the 
present one character at a time.  I have a ][+, so your other solution is not
possible.  I must use 9600 as I wish to be included in a group access to a
VAX, which for complicated reasons cannot use autobauding, and 9600 has been
chosen as the fixed rate.  
                                     Thanks again
                                             Gordon Marwood

marwood@DMC-CRC.ARPA.UUCP (03/03/87)

Thank you for your comments regarding the use of the Applicard and Super
Serial Card at 9600 baud.  In answer to your questions, I am attempting to
use MEX+ to communicate between the Apple/Applicard and a VAX11/780.  MEX
uses the regular CP/M BIOS to communicate with the Apple, though this can
be bypassed, I believe, by suitable patches in the MEX patch area.  What
you have said is encouraging, though it suggests that a special DRIVER
will have to be acquired or written for the Super Serial Card.  Any 
information that you can provide on this would be useful.
                                   thank you again
                                   Gordon Marwood