stephenc@tekgen.TEK.COM (Stephen Coan ) (05/04/88)
I have been having a problem ever since I got my C128 with a 1571 drive to replace my aging 64. The problem is that when I hook up both drives and the printer to either the 64 or the 128, I cannot use the printer, or the drive at address 9. I have hardware changed the 1541 to be at address 9. The printer is a Sekosha C100 (1525 compaitble I believe) and works as a 1525 with GEOS. Either both disk drives, or either disk drive and the printer will work as long as one disk or the printer is powered off/disconnected. This is true with GEOS or in a normal mode of operation. Is this a normal situation or is this unusual? Does anyone else have this problem? Any help would be appreciated. NOTE: The 1571 and C128 are a couple of years old, in case this is relevant at all. Thanks in advance for any help. -- Steve Coan tektronix!tekgen!stephenc (503) 627-1794
dwl10@amdahl.uts.amdahl.com (Dave Lowrey) (05/05/88)
In article < >I have been having a problem ever since I got my C128 with a 1571 drive to >replace my aging 64. The problem is that when I hook up both drives and >the printer to either the 64 or the 128, I cannot use the printer, or the >drive at address 9. > >I have hardware changed the 1541 to be at address 9. > >The printer is a Sekosha C100 (1525 compaitble I believe) and works as a >1525 with GEOS. > >Either both disk drives, or either disk drive and the printer will work >as long as one disk or the printer is powered off/disconnected. This is >true with GEOS or in a normal mode of operation. > >Is this a normal situation or is this unusual? Does anyone else have this >problem? Any help would be appreciated. > >NOTE: The 1571 and C128 are a couple of years old, in case this is relevant >at all. > >Thanks in advance for any help. >-- > > Steve Coan > tektronix!tekgen!stephenc > (503) 627-1794 I had the same problem with my 64/1541/Cardco printer interface. Turned out to be a C64 power supply problem. Don't know what whas wrong with it, but when I replaced it, everything worked fine! -- ------------------------------------------------------------------- "Familiarity breeds attempt" Dave Lowrey Amdahl Corp. Houston, Texas (713)-850-8828 ...!{ihnp4,cbosgd,hplabs,oliveb}!amdahl!dwl10 [ The opinions expressed <may> be those of the author and not necessarily those of his most eminent employer. ]
elg@killer.UUCP (Eric Green) (05/08/88)
in article <2868@tekgen.TEK.COM>, stephenc@tekgen.TEK.COM (Stephen Coan ) says: > replace my aging 64. The problem is that when I hook up both drives and > the printer to either the 64 or the 128, I cannot use the printer, or the > drive at address 9. > > The printer is a Sekosha C100 (1525 compaitble I believe) and works as a > 1525 with GEOS. The Seikosha is probably the problem. Big-name printer manufacturers have been notably unuccessful in their attempts to duplicate the Commodore serial bus routines (probably because timing for those routines is so flaky.... . e.g. the notorious four NOP's for the output-a-byte routine). Try borrowing someone else's printer temporarily, and see if that solves the problem. -- Eric Lee Green elg@usl.CSNET Snail Mail P.O. Box 92191 ihnp4!killer!elg Lafayette, LA 70509 "Is a dream a lie that don't come true, or is it something worse?"