Michael.Chepponis@CMU-CS-C.ARPA (Mike Chepponis) (05/09/85)
I have been using my Kaypro II ("old" style) at 19200 baud regularly for about two years now. In addition, I never need to use the flow control characters ^S and ^Q, so EMACS works without key rebindings. It's true that you need to write your own terminal emulator which is interrupt driven. Incoming characters cause an SIO interrupt so even if an "expensive" operation is happening, like clearing the screen, the character is grabbed and stuffed into a circular buffer. The queued-up characters are processed when the "expensive" operation completes. I also bypass the ROM screen handling routines and write to video ram directly. (Apparently on the "new" 2 and 10 the video controller chip limits the thruput to something around 9600 baud or less, even when you write software to drive it and bypass the ROM.) The Kaypro II hardware can operate at high baud rates; too bad standard software doesn't bother to do it. -Mike -------