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 listReceived on 2017-11-13 17:01:56
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