[Coco] 26-3022 disk interface question

[Joe Grubbs]

You need to add an Extended Color Basic ROM. There is an empty DIP24 socket on the motherboard. It works in conjunction with the Color Basic ROM already present.


--- Original Message ---

From: "AQ Cerutti" <aqcerutti at gmail.com>
Sent: June 10, 2015 9:10 PM
To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
Subject: Re: [Coco] 26-3022 disk interface question

Good to know, I'm pretty new to these Color Computers. So, on my 16k color
computer, I'll need to replace one of the ROM chips with extended color
basic?

Thanks,
Adam

On Wed, Jun 10, 2015 at 5:44 PM, Al Hartman <alhartman6 at optimum.net> wrote:

>
> Even if the controller i working, if your Coco only has Color BASIC, the
> Disk BASIC will not be recognized. You need Extended Color BASIC for Disk
> BASIC to work.
>
>
> -[ Al ]-
>
> On Wed, Jun 10, 2015 at 08:38 PM, AQ Cerutti wrote:
>
>  Correction, I don't think I am seeing the 'extended basic' just color
>> basic
>> 1.2 so my suspicions are probably correct that one or more chips in this
>> interface have probably given up the ghost. Thanks again.
>>
>> On Wed, Jun 10, 2015 at 5:35 PM, AQ Cerutti  wrote:
>>
>>  Thank you for your reply Bob, I will have to check the output again but I
>>> think that this is what I am seeing although it appears to be the same as
>>> what I see without the disk controller inserted. So this older style
>>> interface may not show the licensing information as some of the later
>>> interfaces do if I understand correctly.
>>>
>>> I have cleaned the card edges with an eraser and they look pretty good. I
>>> also re-seated all of the chips as some of them seemed a bit loose. As to
>>> modification, this may have been modified as one chip seems to have a
>>> piece
>>> of masking tape on it with some initials or markings on it. More
>>> investigation needed it seems.
>>>
>>> Thanks much,
>>>
>>> -Adam Cerutti
>>> Portland, Oregon
>>>
>>> On Wed, Jun 10, 2015 at 5:21 PM, Bob Devries wrote:
>>>
>>>  It is my belief that this controller should power up with the banner:
>>>> DISK EXTENDED COLOR BASIC 1.x
>>>>
>>>> If it does not, my first step would be to clean the fingers where they
>>>> fit into the Coco with a PENCIL eraser. Failing that, open the diusk
>>>> controller and ensure that all the chips which are in sockets are
>>>> properly
>>>> seated, and that the ROM is the correct one. AFAIK it should be a
>>>> 24-pinROM, *not* an EPROM, although if it has been modified, it *may*
>>>> have
>>>> a 2764 or 27128 type EPROM.
>>>>
>>>> Good luck.
>>>>
>>>> Regards, Bob Devries
>>>> Dalby, QLD, Australia
>>>>
>>>>
>>>> On 11/06/2015 10:14 AM, AQ Cerutti wrote:
>>>>
>>>>  Hi,
>>>>> I recently purchased a color computer disk system with a 26-3022 disk
>>>>> interface and a mini-disk. I purchased this not realizing that it would
>>>>> not
>>>>> work with my Coco 2 without a multi-pak expansion which I do not have
>>>>> as
>>>>> it
>>>>> needs 12v of external power.
>>>>>
>>>>> Examining the package after I received it, I realized that the disk
>>>>> interface had been opened. The screw under the label is exposed.
>>>>> Everything
>>>>> inside the interface looks good but I don't have the means to test the
>>>>> chips and when I plugged the interface into my Coco 2 and powered it
>>>>> on,
>>>>> I
>>>>> did not see anything different on the screen.
>>>>>
>>>>> My question is this:
>>>>> Even if the 26-3022 needs 12v of power, with the interface in the
>>>>> computer
>>>>> should I still be seeing the extended basic screen and licensed from
>>>>> Microsoft information? I'm not which leads me to believe that there may
>>>>> be
>>>>> something wrong with the interface.
>>>>>
>>>>> Can anyone confirm what I should be seeing with a 26-3022 interface in
>>>>> a
>>>>> Coco 2?
>>>>>
>>>>> Thanks for your help!
>>>>>
>>>>>
>>>>>  --
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>>>> Coco at maltedmedia.com
>>>> https://pairlist5.pair.net/mailman/listinfo/coco
>>>>
>>>>
>>>
>>>
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>>
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