Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!wuarchive!uunet!mcsun!hp4nl!tuegate.tue.nl!rc6.urc.tue.nl!rw6.urc.tue.nl!rcbarn From: rcbarn@rw6.urc.tue.nl (Raymond Nijssen) Newsgroups: comp.unix.sysv386 Subject: Re: Summary: 4-port cards Message-ID: Date: 29 Apr 91 15:58:41 GMT References: <1991Apr21.224353.693@unixland.uucp> Sender: news@rc6.urc.tue.nl Reply-To: rcbarn@urc.tue.nl Lines: 26 gemini@geminix.in-berlin.de (Uwe Doering) writes: >rcbarn@rw7.urc.tue.nl (Raymond Nijssen) writes: >>bill@unixland.uucp (Bill Heiser) writes: >>>In article davidg%aegis.or.jp@kyoto-u.ac.jp (Dave McLane) writes: >>>> You can buy NS16550AFNs from Altex Electronics. >>>Careful here ... I ordered *NS16550A* chips [...] >> >>Be even more careful here! Only the AFN version offers a 16 byte FIFO. > >I disagree. I developed FAS for NS16550A chips, and have six of them on my >own serial card. And obviously, FAS uses the 16 byte FIFOs. The `AF' version >has a faster timing, but is functionally equivalent to the `A' version. The >trailing `N' indicates the packaging technique used for this chip, in >this case a plastic body in DIL form. My warning reflected the warnings some 2 years ago that there were NS16550A's around with broken FIFO's; it was stated repeatedly that not all bytes of the FIFO were ok, though I didn't experience this myself: I just got the AF(N) version which works fine. -Raymond -- | Raymond X.T. Nijssen | Eindhoven Univ. of Technology | | raymond@es.ele.tue.nl | EH 7.13, PO 513, 5600 MB Eindhoven, The Netherlands | | "Don't put that on the wall in a tax-payer supported museum!" Pat Buchanan |