dd26+@andrew.cmu.edu (Douglas F. DeJulio) (12/13/90)
I've got an AT&T PC6300 with an NI5010 ethernet card in it. I want to make this PC into a router for my house, routing between our ethernet and our SLIP connection (I'm using the ka9q software). I can get SLIP working at 9600 baud, but our line can go to 19.2kbaud. The PC drops too many characters at 19.2kbaud, and none of the packets get through (except for ICMP echo packets). I've noticed that one of the dipswitches selects between a 8250 and an 8530 as the chip driving the serial port (I'd have to get and install the chip, I guess, but the ROMs support it). Can anyone out there tell me if I'd get improved performance with the 8530 chip? What capabilities would this chip give me? -- Doug DeJulio dd26@andrew.cmu.edu
jfk@ais.org (Jim Knight) (12/13/90)
In article <MbNapHO00VI8FOUZdd@andrew.cmu.edu> dd26+@andrew.cmu.edu (Douglas F. DeJulio) writes: >I've noticed that one of the dipswitches selects between a 8250 and an >8530 as the chip driving the serial port (I'd have to get and install >the chip, I guess, but the ROMs support it). Can anyone out there >tell me if I'd get improved performance with the 8530 chip? What >capabilities would this chip give me? The 8250 is pretty much a brain damaged chip from what I hear. I'm not sure about the 8530, but the NS16550AF or AFN are pin compatible replacement Uart's that will handle the high speeds. When I picked up my USR Hst 1441 modem (14,400 bps connects) I had to get a NS16550AFN to replace my 8250. The 8250 could not handle the speeds above 9600. Hope this helps. Jim. -- ================================================================= Come Visit M-net. Michigan's Public Access Unix and Conferencing (313) 994-5023 jfk@m-net.ann-arbor.mi.us jfk@ais.org