Re: upgrading CBM-3040?

From: william degnan <billdegnan_at_gmail.com>
Date: Mon, 13 Nov 2017 11:53:41 -0500
Message-ID: <CABGJBucGtL41qvHo9ztF3sC0ZdPgdMiUOMdY5pokzx1T757=Aw@mail.gmail.com>
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 list
Received on 2017-11-13 17:02:30

Archive generated by hypermail 2.2.0.