Re: upgrading CBM-3040?

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
>


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