neese@adaptx1.UUCP (11/03/90)
>/* ---------- "Adaptec 1542a and Asynchronous tran" ---------- */ >I just got my Adaptec 1542a installed with a 330MB Priam SCSI hard drive. >Things were working well, until I tried running Telix to do some downloading >with my USR 14.4k HST modem... > >The problem is that after each 10k buffer, the next data packet will have a >CRC error (using Zmodem, with MNP error correction)... now, upto last night, >when I was using my MFM drive, I had never encountered such problems... >the problem comes from my new SCSI system... when I read the manuals for >the Adaptec, it didn't have anything about such errors to occur... > >the board was initially installed for hardware interrupt 11 and DMA channel >5... I reconfigured it to interrupt 14, and no solutions... > >my feeling is that there is an interrupt conflict somewhere along the line, >that's not letting me do serial communications while the HD is doing its >read/write (which it SHOULD be doing, right?)... > >if someone could kindly help me out, I'd be infinitely grateful I think I might have a solution for you. The default bus on time for the 154x is 11us. Obtain a copy of SETSCSI.EXE and use it to set the bus on time to 7us and see what happens. If you don't have access to SETSCSI.EXE, let me know and I will E-mail it to you. Roy Neese Adaptec Senior SCSI Applications Engineer UUCP @ uunet!utacfd!cs.utexas.edu! {nominil,merch,cpe}!adaptex!neese uunet!mlite!adaptex!neese