Re: Random Characters

Hi,

On 2012-02-07 14:21, Ed Johnson wrote:
>
> arcade comp
>

Do you have an URL for this webshop ?

/Uffe

>
>
> -----Original Message-----
> From: owner-cbm-hackers@musoftware.de
> [mailto:owner-cbm-hackers@musoftware.de] On Behalf Of MikeS
> Sent: Monday, February 06, 2012 11:25 PM
> To: cbm-hackers@musoftware.de
> Subject: Re: Random Characters
>
> Excellent! Congratulations; which version of the PLA did you get, arcade
> comp or retro-donald??
>
> m
> ----- Original Message -----
> From: "Ed Johnson"<ejohnson.ed@gmail.com>
> To: "'Rob Clarke'"<crock@clarke-family.org.uk>;<cbm-hackers@musoftware.de>
> Sent: Monday, February 06, 2012 7:23 PM
> Subject: RE: Random Characters
>
>
>> Thanks for all the help. The new PLA arrived today.
>> I performed the surgery on it and the patient is
>> doing fine. It actually seems to have clearer video.
>>
>> Now to fix the sound...
>>
>> Best regards,
>> Ed Johnson
>>
>>
>> -----Original Message-----
>> From: Rob Clarke [mailto:crock@clarke-family.org.uk]
>> Sent: Sunday, January 29, 2012 10:10 AM
>> To: cbm-hackers@musoftware.de
>> Cc: Ed Johnson
>> Subject: Re: Random Characters
>>
>> Some early boards do not have the commodore part number on the PLA. In
>> this
>> particular photo it's below the 6510 (cpu) and to the left of the
>> 6581 (SID).
>>
>> If it is the PLA at fault, you can buy a new one here:
>> http://www.arcadecomponents.com/catalog/item/3054735/8335676.htm or buy a
>> modern replacement here :
>>
> http://retro-donald.de/sinchai-shop/index.php?main_page=product_info&cPath=3
>> &products_id=16
>>
> <http://retro-donald.de/sinchai-shop/index.php?main_page=product_info&cPath=
>> 3&products_id=16>
>>
>> rob
>>
>> On 29/01/2012 16:01, Ed Johnson wrote:
>>> I don't see that chip. Can you identify it in this photo?
>>>
>>> http://upload.wikimedia.org/wikipedia/commons/8/86/C64motherboard.jpg
>>>
>>>
>>> -----Original Message-----
>>> From: owner-cbm-hackers@musoftware.de
>>> [mailto:owner-cbm-hackers@musoftware.de] On Behalf Of Gerrit Heitsch
>>> Sent: Sunday, January 29, 2012 8:56 AM
>>> To: cbm-hackers@musoftware.de
>>> Subject: Re: Random Characters
>>>
>>> On 01/29/2012 02:29 PM, Ed Johnson wrote:
>>>> I have a C64 that displays random characters on the screen and locks
>>>> up when powered on. Sometimes it powers on correctly but within
>>>> seconds displays random characters and locks up. I bought it off eBay
>>>> and it worked fine for about a week of heavy use but then this
>>>> problem
>>> started.
>>>
>>> The usual suspects in this case are the PLA (906114-01), the 74LS258,
>>> the CIA that supplies the 2 extra address bits for the VIC and maybe the
>> RAM.
>>>
>>> Also, if any of the chips I mentioned are in sockets, see if removing
>>> them and putting them back in helps.
>>>
>>>     Gerrit
>>>
>>>
>>>
>>>
>>>          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
>
>
>         Message was sent through the cbm-hackers mailing list
>
>
>         Message was sent through the cbm-hackers mailing list




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