wtm@uhura.neoucom.EDU (Bill Mayhew) (05/28/90)
Yes indeed. This is a problem. Under some cirucmstances, Simultask can't even keep up with a 2400 baud data stream on the Simlultask COM port. The way to get some relief is to obtain the public domian "fas" (short for 'final asynchronous solution') tty driver. Fas may be linked into the kernel in place of the standard "asy" driver. Fas requires the use of a 16455 UART chip in place of the stock 16450 or 8250B. If one didn't want to alter the harware of a 6386, she/he could add a generic COM board and replace the UART on that generic board. The fas archive comes with all the files one needs. While the Readme file doesn't mention AT&T Sys V specifically, follow the instrucitons for Interactive's Unix, the procedure is the same. The only thing I would recommend is changing the the fas driver major device number to 19 (decimal) from the value of 4 that is mentioned in the documentation. If you install everything available in the AT&T kernel, all the major numbers up to 18 are already spoken for. I am very pleased with the utility of the fas driver. Fas did the trick for me. I needed fas to get full benefit from my Trailblazer Plus. With fas, I can run the tty port at 19200, which results in ~1400 char/sec transfers of large (~100K) files with modem compression switched off. I am using a generic 33 MHz ISA bus system I built a la carte myself and AT&T Sys V 3.2.1. ==Bill== -- Bill Mayhew Northeastern Ohio Universities College of Medicine Rootstown, OH 44272-9995 USA 216-325-2511 wtm@uhura.neoucom.edu ....!uunet!aablue!neoucom!wtm