From: Mike Paull (mike351_at_ozemail.com.au)
Date: 2004-07-11 08:16:29
> True, but my question was whether there exists an (official) JiffyDOS > chip that resides on a 27128 eprom and does not have a switch. This > query is in reference to whether the chip in my drive was made by CMD > or it's successor, Maurice Randall, and not pirated chip. Sounds like a pirated chip, does it have a printed sticker on it with the CMD name and JiffyDos on it? As far as I was aware all 1541 revisions came on a pcb with switch, although back when CMD owned it you *may* have been able to order it without that. > >An original JiffyDOS package normally has both the original CBM DOS and > >JiffyDOS switchable for compatability reasons,... > > Then this means that the drive he sold me has a hacked/bootleg/pirate > JiffyDOS chip. Is this assumption correct? Unless you can speak to the former CMD guys and Maurice your going to have a hard time proving it. Even if it has no sticker on it he could say that it must have fallen off with age, heat etc.. > >... some programs might not work > >with JiffyDOS so at least you can switch it out. > > I knew that already. And this chip lacks the CBM 2.6 DOS so JD cannot > be switched out, correct? Yeap. Mike > > TIA. > > -Jack- > > > >mike > > > > > >> -----Original Message----- > >> From: firstname.lastname@example.org > >> [mailto:email@example.com]On Behalf Of Jack > >> Sent: Sunday, 11 July 2004 1:32 PM > >> To: firstname.lastname@example.org > >> Subject: JiffyDOS and the 1541-II Drive > >> > >> > >> > >> Has anybody here ever encountered a JiffyDOS revision for the 1541-II > >> that doesn't require a switch? > >> > >> I just received a 1541-II with Jiffydos, but no switch. I've never > >> heard of this, so I wrote the seller back, inquiring about it. He > >> replied: "...the jiffy dos that is installed in your unit does not > >> have the switch. it works automatically when a jiffy dos system is > >> used & normal dos operation for non-jiffy systems..." > >> > >> AFAIK, only the 1571 and 1581 incorporated autoswitcing. I opened up > >> the unit and had a look. The EPROM is a 27C128. It is labeled > >> "JiffyDOS 6.01" Is this chip for real, or is the guy selling me a > >> line? > >> > >> Thanks for comments > >> > >> -Jack- > >> > >> > >> > >> Message was sent through the cbm-hackers mailing list > >> > > > > > > > > Message was sent through the cbm-hackers mailing list > > > > Message was sent through the cbm-hackers mailing list > Message was sent through the cbm-hackers mailing list
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