need a source of 7501 micros

Chris M chrism3667 at yahoo.com
Thu Jun 9 01:12:37 CDT 2005


So has anyone tried substituting a 6510 for a 7501? 

--- Hans Franke <Hans.Franke at siemens.com> wrote:

> Am 2 Jun 2005 11:01 meinte Allison:
> > >Subject: need a source of 7501 micros
> > >   From: Chris M <chrism3667 at yahoo.com>
> > >   Date: Tue, 31 May 2005 19:16:31 -0700 (PDT)
> > >     To: cctech at classiccmp.org
> 
> > >....as used in the Commodore Plus 4. Preferably
> new
> > >*lol*. Hey...you never know...
> 
> > You'd be mighty lucky to get what you want.
> 
> > The 7501 is a mask programmed 4bit micro with LCD
> driver
> > containing a 1024byte program rom and 96 nibbles
> of ram.
> > Where used it's a custom part due to the rom.
> 
> > Know the part well as I used to be the product
> engineer.
> 
> Well, seams to be a close miss :)
> 
> The 7501 is a Commodore 6502 or to be more exact,
> its
> the HMOS version of the NMOS 6510 as used in the
> C64,
> which is a rather plain 6502 with one 7 bit paralell
> port on chip. Later on the 8501 was done as a result
> of another process change, eventualy leading to the
> 8502 as used in the C128.
> 
> So, if you search for a 7501 replacement, any 6510
> might do it ... with some additional soldering,
> since
> Commodore shifted the pins arround with every
> version.
> 
> 
> Gruss
> H.
> --
> VCF Europa 6.0 am 30.April und 01.Mai 2005 in
> Muenchen
> http://www.vcfe.org/
> 
> 


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