HP 2671 Graphics ROM
hp-fix at xs4all.nl
Fri Mar 19 16:29:50 CDT 2010
> -----Oorspronkelijk bericht-----
> Van: cctalk-bounces at classiccmp.org
> [mailto:cctalk-bounces at classiccmp.org] Namens Tony Duell
> Verzonden: vrijdag 19 maart 2010 22:08
> Aan: cctalk at classiccmp.org
> Onderwerp: Re: HP 2671 Graphics ROM
> > Thanks , HP was talking about adding a graphics chip (ROM).
> My printer -- the one the schematics were produced from -- is
> a 2671G.
> > The 2671 has an empty socket on the HP-IB interface board, the one
> > closest to the printer PCB is empty.
> I think mine does too. I am pretty sure I indicated that the
> external ROM for that microcontroller was 'N/F' (meaning 'Not
> Fitted'). You could use a 8039 microcnotrller and an extenal
> ROM or an 8049. One of the switches on the itnerface board
> sets the state of the EA pin
> > I'm not sure if that's the one, it could be the ROM on the
> printer PCB
> > it self.
> I am also almost certain that my printer PCB has an external
> ROM. I think it's an 8049 microcnnotroller on there too.
> Again, I would have to check the settings of the swithes to
> see if the interal ROM of that microcontroller is used). Of
> course an 8049 with EA pulled hich acts just like an 8039 AFAIK.
> > It would be very nice if you find out what needs to be replaced, on
> > the printer PCB on the one I have a 8039 with external ROM is used.
> I should have some time tomorrow to pull the covers and
> check. We can compare our 2 machines to see jsut what the
> differences are.
Seems a good idea, I'll write down the part numbers so we can compare.
More information about the cctalk