I'm pretty sure it was a firmware issue - not in the port hardware itself. Your //c may work fine now because it may have been serviced at some point. I believe it was a motherboard swap.
Here's a link to technote #7 which describes various issues with ea //c revision. http://web.pdx.edu/~heiss/technotes/aiic/tn.aiic.7.html ----- Original Message ----- From: "Antonio Rodr�guez" <[EMAIL PROTECTED]> To: "Apple2list" <[EMAIL PROTECTED]> Sent: Tuesday, May 18, 2004 8:09 AM Subject: Re: What is the official name for the color of a IIc ? > Sean Fahey ha escrito: > > > To identify which revision you have, from BASIC type "PRINT PEEK (64447)" > > then press enter. > > > > 255 = Original //c that has issues with serial ports > > 0 = It can use the UniDisk 3.5 > > 3 = Can use memory card. > > 4 = Last //c before the //c+ > > 5 = //c+ > > I know I have an original //c (ID=255), and I have heard about the serial port > problems. What is that problem about exactly? I haven't had any problem with > serial communications. I only have found that my //c can't talk to *recent* PCs > (Pentium II or newer) at baud rates higher than 300 bps (with earlier PCs, as my > Pentium 75, it can do all the way to 19200). I don't think the problem is > processor speed-related, because even the Pentium 75 is several hundreds faster > than the 1 Mhz 65C02 of the //c. Is that related to the supposed bug of the > original //c? Is there an easy way of fixing it (perhaps replacing the ROMs with > a newer ones)? Will the ROM update alone also allow me to use a 3.5" drive? > > Greetings, > > Antonio Rodr�guez (Grijan) > <ftp://grijan.cjb.net:21000/> > > > > > -- > Apple2list is sponsored by <http://lowendmac.com/> and... > > / Buy books, CDs, videos, and more from Amazon.com \ > / <http://www.amazon.com/exec/obidos/redirect-home/lowendmac> \ > > Support Low End Mac <http://lowendmac.com/lists/support.html> > > Apple2list info: <http://lowendmac.com/lists/apple2.html> > --> AOL users, remove "mailto:"; > Send list messages to: <mailto:[EMAIL PROTECTED]> > To unsubscribe, email: <mailto:[EMAIL PROTECTED]> > For digest mode, email: <mailto:[EMAIL PROTECTED]> > Subscription questions: <mailto:[EMAIL PROTECTED]> > Archive: <http://www.mail-archive.com/apple2list%40mail.maclaunch.com/> > > Using a Mac? Free email & more at Applelinks! http://www.applelinks.com > > -- Apple2list is sponsored by <http://lowendmac.com/> and... / Buy books, CDs, videos, and more from Amazon.com \ / <http://www.amazon.com/exec/obidos/redirect-home/lowendmac> \ Support Low End Mac <http://lowendmac.com/lists/support.html> Apple2list info: <http://lowendmac.com/lists/apple2.html> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive: <http://www.mail-archive.com/apple2list%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
