what would really be smooth if you could switch back and forth between 3040 and 4040 modes. b On Mon, Nov 13, 2017 at 11:51 AM, william degnan <billdegnan@gmail.com> wrote: > that is my understanding. > b > > On Mon, Nov 13, 2017 at 11:33 AM, Francesco Messineo < > francesco.messineo@gmail.com> wrote: > >> On Mon, Nov 13, 2017 at 3:17 PM, william degnan <billdegnan@gmail.com> >> wrote: >> > Yes. There was an upgrade kit. If you can find the chips or steal them >> > from a 4040 drive here is what I found: >> > >> > Replace the 6530 with the CBM chip 901466-04 >> > UL1 gets a 901468-12 >> > UJ1 gets a 901468-11 (take from 4040 UK1) >> > UH1 gets a 901468-13 >> >> ok, the last three chips can be 2532 EPROMs with the right content, no >> problems here. >> Looking at the schematics, it seems that the 6530's ROM is selected by >> /RS0 only, so in theory, I could >> make an adapter to tie /RS0 of the original 6530 high, and use the >> select signal to enable another external EPROM for the new >> code. The rest of the 6530 should continue to work as expected, am I >> right? >> >> >> > >> > >> > You'll have to convert the 2040-formatted disks to 4040 format to read >> them. >> > The 2040/3040 will with the upgrade act like a 4040 drive. >> > >> > On Mon, Nov 13, 2017 at 8:20 AM, Francesco Messineo >> > <francesco.messineo@gmail.com> wrote: >> >> >> >> Hi all, >> >> just a quick question for the experts: Is it possible to upgrade a >> >> 3040 dual drive to DOS2.1 (like a 4040)? >> >> Thanks >> >> >> >> Frank >> >> >> >> 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 listReceived on 2017-11-13 17:02:30
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