Re: 6502 CPU Schematic

["Bryan Parkoff" <BParkoff@satx.rr.com>]

Yes, Please.  I appreciate this.

--
Yours Truly,

Bryan Parkoff
BParkoff@satx.rr.com
"Stephen Shaw" <bottrawler@junkbuster.zzn.com> wrote in message
pan.2002.12.20.03.09.58.416517@junkbuster.zzn.com">news:pan.2002.12.20.03.09.58.416517@junkbuster.zzn.com...
> On Thu, 19 Dec 2002 09:01:45 +0000, Yves McDonald wrote:
>
> > Hi Bryan,
> >
> > You are tackling something big: as much as I can remember, the original
> > MOS technology 6502 was a power-hungry NMOS device which memory cells
> > (registers, program counter, status reg) were dynamic cells to reduce
> > transistor count.  That imposed a minimum clock frequency.  Being an
> > ancient device, I wonder if electrical schematics do exist at all or if
> > the engineers just created the chip by drawing the required photographic
> > masks.  Rather than contemplating a mess of transistors, I'd rather go
for
> > the logic diagrams which break the microprocessor into its major
> > components: registers, ALU, buses and instruction decoding logic.  The
> > latter is probably the most complex component.
> >
> > The problem with studying the 6502 is that you will miss all the 'C02
and
> > 16-bits instructions implementation.  You'll have to ask Western Digital
> > for data on the 65816 and I'm not convinced they are willing to give
> > freely that kind of info.  Based on personnal experience, I don't think
> > they will: in a related case, I asked Futaba for schematics to
> > troubleshoot a defective, obsolete 1991 R/C model airplane radio
receiver
> > and my request was politely denied.  From there, I decided to dump the
> > whole set to the recycle bin :(.  I whish companies would be more open
> > about their obsolete technologies (Apple, do you hear that about GS/OS
> > sources? :-)
> >
> > An approach I was considering is to have a modern, insanely fast RISC
> > processor to emulate a 65816 then scale up the architecture to 32 bits
> > rather than picking up where WD has left.
> >
> > Bryan Parkoff wrote:
> >
> >>     Do you know where can I find schematic that is INSIDE 6502 CPU
only,
> >>     but
> >> not for Apple II motherboard.  I will be able to study how 6502 CPU
> >> work.
> >>     It is my goal to build CPU that will support 32 bits and 64 bits
> >>     like
> >> 65832 and 65864.  All PCI slots, AGP slots, DIMM, and all modest
> >> hardware will be designed with new CPU in a motherboard.  It is like
> >> restoration for Apple II with 32 bits and 64 bits.
> >>     What do you think about my idea?  I feel bad that PowerPC will be
> >>     out of
> >> business very soon and Apple Computer, Inc does not have choice but
have
> >> to port Mac OSX to Intel, but I tell them to design their own CPU --
> >> 65832 or 65864.  It will profit with great sales at lower costs.
> >>
> >> --
> >> Yours Truly,
> >>
> >> Bryan Parkoff
> >> BParkoff@satx.rr.com
> >>
> >>
> >>
> >>
>
>
> I still have the original Synertek 6502 manual. Shall I start scanning it?
>