Path: utzoo!attcan!uunet!lll-winken!lll-tis!helios.ee.lbl.gov!nosc!ucsd!ucsdhub!hp-sdd!ncr-sd!ncrlnk!ncrcce!c10sd3!c10sd1!johnson From: johnson@c10sd1.StPaul.NCR.COM (Wayne D. T. Johnson) Newsgroups: comp.sys.ibm.pc Subject: Re: ISDN Message-ID: <476@c10sd1.StPaul.NCR.COM> Date: 16 Aug 88 13:43:02 GMT References: <18.23040D6B@rubbs1.FIDONET.ORG> <6108@bigtex.uucp> Reply-To: johnson@c10sd1.StPaul.NCR.COM (Wayne D. T. Johnson) Organization: NCR Comten, St Paul Lines: 20 In article <6108@bigtex.uucp> james@bigtex.UUCP (James Van Artsdalen) writes: >if they did, you still have to have a black box for your PC: Mess-DOS >rolls over dead at the thought of 9600bps (interrupt latency on >extended memory on slow machines), much less 8Kbytes/sec! I rather If you were counting on the PC to do all the work, yes 8K/sec would be messy. However, if you connected this in through a DMA channel or used the AT string commands (which are faster than DMA for smaller blocks, ask DOS) you could get some pretty good rates. I just finished a product that could handle 2 19.2 lines at once, recording this data to disk as well as the screen and also scans that data for specific strings. Our biggest problem was getting the special comm adapter to go as fast as we could. And just thing of what you could do with ISDN and LAN tech.... makes one want to drool. -- Wayne Johnson (Voice) 612-638-7665 NCR Comten, Inc. (E-MAIL) W.Johnson@StPaul.NCR.COM or Roseville MN 55113 johnson@c10sd1.StPaul.NCR.COM These opinions (or spelling) do not necessarily reflect those of NCR Comten.