Newsgroups: comp.sys.amiga.datacomm Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!sdd.hp.com!news.cs.indiana.edu!cica!travis!greg From: greg@travis.cica.indiana.edu (Gregory TRAVIS) Subject: Re: ASDG Dual Serial Board Message-ID: Sender: news@cica.indiana.edu (News System) Nntp-Posting-Host: travis.cica.indiana.edu Organization: Indiana University References: Date: 12 Apr 91 02:15:30 GMT ersys!kevind@nro.cs.athabascau.ca (Kevin Dackiw) writes: >My thoroughput via the DSB seems to be somewhat slower than through the >Amiga serial port, though I almost never now get an error when I use >the modem (14.4k, v.42 HST)...why is this? Bus contention? > >Also, the DSB seems to be a system hog! Is this a hardware fault, or a >device driver/handler fault? Is there a public upgrade for the software >that comes with the DSB? > Agreed 100% I posted an article a long time ago, well a couple of months ago, addressing this question. My DSB, even with the latest drivers, seems to have about two times the overhead per port that the built-in Amiga serial port has. I don't have the times handy, but I recall that it took about 30 seconds to load ProPage 1.3 while a ZModem transfer (inbound to the Amiga) at 9600 baud was going on. With the same setup going through the Amiga's native port ProPage loaded in about 15 seconds. And the ASDG port managed to rack up several transfer errors while the Amiga port reported none. Of course I flushed all system buffers before I began either test. Actually, I rebooted the system in each case just before starting up VLT and the download. So these were well controlled experiments. Outbound I could not find any performance differences between the ASDG board and the Amiga's native port. Anyone know why? ASDG has always made nice stuff in the past... -- Gregory R. Travis Indiana University, Bloomington IN 47405 greg@cica.indiana.edu Center for Innovative Computer Applications This signature intentionally left blank.