Hi Ed - Yes, they are all interchangeable with the exception of th later cost reduced boards which don't have a stand alone PLA - the majority of the logic functions are integrated into a single large MMU. I think the 906114-02 (as well as -03,-04 & -05) was from one of the P or B series machines, so no, it will not be compatible. Rob On 29/01/2012 17:48, Ed Johnson wrote: > It's a 906114-02 is that interchangeable with a 906114-01? > > > Best regards, > Ed Johnson > (904) 584-4362 VoIP > (904) 444-5402 Cell > > -----Original Message----- > From: Rob Clarke [mailto:email@example.com] > Sent: Sunday, January 29, 2012 10:10 AM > To: firstname.lastname@example.org > 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: email@example.com >> [mailto:firstname.lastname@example.org] On Behalf Of Gerrit Heitsch >> Sent: Sunday, January 29, 2012 8:56 AM >> To: email@example.com >> 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 listReceived on 2012-01-29 18:00:26
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