sorry I was wrong it's definitively not an eprom but a rom produced by mos technology I'll try to get more information from the author.... On 18/05/2017 21:45, Gerrit Heitsch wrote: > On 05/18/2017 09:34 PM, didier derny wrote: >> Hi, >> >> >> I tried to read it as a 2532 I get 2k of FF and 2k of real code >> (visibly 6502 opcodes) >> >> but I tought it was a 4k eprom > > It could still be a 4K (EP)ROM, but it could also mean that only half > of it is used. Unprogrammed EPROM cells read as FF. > > > Gerrit > > > > > >> >> >> On 18/05/2017 21:21, Francesco Messineo wrote: >>> If it was on a PET, it's either readable as 2532 or (much less >>> probable) a 2716. >>> Frank >>> >>> On Thu, May 18, 2017 at 8:56 PM, didier derny <didier@aida.org> wrote: >>>> there are no other marking on the top >>>> >>>> on the bottom there is a number: 41203 made with some ink >>>> >>>> I know roughly what is in this eprom but I'm not sure about the >>>> machine nor >>>> the rom type >>>> >>>> its a basic extension but never seen this version 2.0 is probably the >>>> version of the basic with which it was used >>>> >>>> >>>> On 17/05/2017 22:21, Francesco Messineo wrote: >>>>> On Wed, May 17, 2017 at 10:16 PM, didier derny <didier@aida.org> >>>>> wrote: >>>>>> I'm trying to identifiy an eprom type to try to read it >>>>>> >>>>>> the rom is made by mos technology >>>>>> >>>>>> 24 pin >>>>>> >>>>>> datecode: 3680 (the 4000/8000 were not sold at this time ?) >>>>>> >>>>>> label: Edex 2.0 >>>>>> >>>>>> >>>>>> my wild guess is to say it was for the commodore 3000 not found the >>>>>> schematics I guess it's equivalent to 2001N >>>>>> >>>>>> on the schematics I found rom 6332 any datasheet any where ? >>>>>> >>>>>> what differences between a 2332 and a 6332 ? >>>>> >>>>> I've never heard about 6332. 2332 is the classic 4k ROM, pin >>>>> compatible with 2532 EPROM type (NOT 2732). >>>>> Is there anything else under the label? There must be a part >>>>> number too. >>>>> >>>>> Regards >>>>> Frank IZ8DWF >>>>> >>>>> 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 Message was sent through the cbm-hackers mailing listReceived on 2017-05-18 21:00:02
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