On Thu, May 18, 2017 at 9:34 PM, didier derny <didier@aida.org> wrote: > Hi, > > > I tried to read it as a 2532 I get 2k of FF and 2k of real code (visibly > 6502 opcodes) it might be a 2716 then. Or have a broken address line. If it reads real code when A11 is low, then it's more likely a 2K ROM (A11 pin on the 2532 is an output enable active low on the 2716). If it reads real code with A11 high, I would suspect a partial failure. > > but I tought it was a 4k eprom > > > 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 listReceived on 2017-05-18 20:02:28
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