merv@gpstwr.UUCP (Merv Graham) (03/01/90)
We are now installing a Telebit T2500 modem on our tower (400). It is now running just fine at 9600 baud on ttya. Question: If I try to run it at 19.2kb on ttya will it put more of a load on the main CPU (68020) slowing the system down more than if I put it on another port (HPSIO) which has a 6809 to handle some of the I/O interface? Any comments, experiences, etc. would be appreciated. E-mail if you don't think they would be of general interest. Thanks, Merv -- Merv Graham | merv@gpstwr.UUCP Graham-Patten Systems, Inc. | or: tektronix!gvgpsa!gpstwr!merv P.O. Box 1960 | Grass Valley, CA 95945 | Ph: 916-273-8412 FAX: 916-273-7458
wescott@Columbia.NCR.COM (Mike Wescott) (03/05/90)
In article <500@gpstwr.UUCP> merv@gpstwr.UUCP (Merv Graham) writes: > We are now installing a Telebit T2500 modem on our tower (400). > It is now running just fine at 9600 baud on ttya. > If I try to run it at 19.2kb on ttya will it put more of a load on > the main CPU (68020) slowing the system down more than if I put it on > another port (HPSIO) which has a 6809 to handle some of the I/O > interface? Yes, it will slow the cpu down significantly. That's why the hpsio's were developed (they have a 68010, not the 6809). Moreover an ordinary 400 probably can't drive a telebit at 19.2kbps on ttya or ttyb. -- -Mike Wescott mike.wescott@ncrcae.Columbia.NCR.COM