In article <WuadnfD9MpXRIfXeRVn-sA@giganews.com>,
harivj <harivj@rediffmail.com> wrote:
>Hai
>
>Is there anybody give me guidance about RTL implementation of the complete
>68HC11. I am involved in design of one such at transistor level and none of
>the book or online reference talk about pure hardware implementation. All I
>could see is how to program a HC11 but not how to build one. Any
>information in this regard would help.
Look for the "Cycle-by-Cycle Bus Activity" description in the programmers
reference or datasheet. Digging on the bookshelf, the old (1985)
Programmer's Manual MC68HC11PM/AD gives a lot more information on what
happens on a cycle by cycle basis than the later Reference Manual (which
puts this on the page for each instruction instead of a seperate section).
Getting a more detailed block diagram (than shows up in the later 68HC11
documents) of the CPU section out of a 6800 or 6801 may add some insight.
Mark Zenier mzenier@eskimo.com
Googleproofaddress(account:mzenier provider:eskimo domain:com)
Reply by ●November 3, 20052005-11-03
Noone wrote:
> Only the old duffers in the group would remember RTL.
> (I be one). Fairchild was the supplier I remember best.
Everett M. Greene wrote:
> Wasn't Fairchild the only supplier?
No, there were many suppliers. Motorola and TI also made RTL.
I think Signetics did as well, but I'm not 100% certain.
Motorola may have been the vendor to most recently discontinue RTL;
some of the RTL parts were still available from them in the late 1980s.
Eric
Reply by Everett M. Greene●November 3, 20052005-11-03
Noone <Noone@wrenchman.com> writes:
> Grant Edwards wrote:
> > On 2005-11-02, Noel Henson <noel@noels-lab.com> wrote:
> >
> > >>> Is there anybody give me guidance about RTL implementation of
> > >>> the complete 68HC11.
> > >>
> > >> You want to build an HC11 using resistor-transistor logic?
> > >
> > > I believe Vijay is referring to Register Transfer Level
> > > representation of the HC11. It's essentially a programmatic
> > > method of simulation.
> >
> > Ah. I thought it must be something other than
> > resistor-transistor logic, but all Google came up with was the
> > German TV netowrk. I probably should have thrown in a few more
> > keywords.
> >
> > Is RTL synthesizable, or is it just for simulation?
>
> Only the old duffers in the group would remember RTL.
> (I be one). Fairchild was the supplier I remember best.
Wasn't Fairchild the only supplier?
> The venerable 723/923 flip flop and the 900 buffers. The
> packages were great little blobs of epoxy similar to the
> transistors of the day.
They were also great little hand warmers on cold days.
> We, of course, felt empowered by such technology.
It beat discrete components!
Reply by Tauno Voipio●November 2, 20052005-11-02
Noone wrote:
> Grant:
>
> Only the old duffers in the group would remember RTL. (I be one). Fairchild
> was the supplier I remember best. The venerable 723/923 flip flop and the 900
> buffers. The packages were great little blobs of epoxy similar to the
> transistors of the day. We, of course, felt empowered by such technology.
My first IC's - MC 700 series, NOR logic with severely limited
fan-in and fan-out. Year 1968 or 1969.
--
Tauno Voipio
tauno voipio (at) iki fi
Reply by Grant Edwards●November 2, 20052005-11-02
On 2005-11-02, Noone <Noone@wrenchman.com> wrote:
> Only the old duffers in the group would remember RTL. (I be
> one). Fairchild was the supplier I remember best. The
> venerable 723/923 flip flop and the 900 buffers. The packages
> were great little blobs of epoxy similar to the transistors of
> the day. We, of course, felt empowered by such technology.
I must admit that I never actually used RTL (but it was still
covered briefly when I was in school). One of the first places
I worked still had a few drawers of RTL parts for maintenance
purposes.
--
Grant Edwards grante Yow! Now KEN and BARBIE
at are PERMANENTLY ADDICTED to
visi.com MIND-ALTERING DRUGS...
Reply by Noone●November 2, 20052005-11-02
Grant:
Only the old duffers in the group would remember RTL. (I be one). Fairchild
was the supplier I remember best. The venerable 723/923 flip flop and the 900
buffers. The packages were great little blobs of epoxy similar to the
transistors of the day. We, of course, felt empowered by such technology.
Blakely
Grant Edwards wrote:
> On 2005-11-02, Noel Henson <noel@noels-lab.com> wrote:
>
> >>> Is there anybody give me guidance about RTL implementation of
> >>> the complete 68HC11.
> >>
> >> You want to build an HC11 using resistor-transistor logic?
> >
> > I believe Vijay is referring to Register Transfer Level
> > representation of the HC11. It's essentially a programmatic
> > method of simulation.
>
> Ah. I thought it must be something other than
> resistor-transistor logic, but all Google came up with was the
> German TV netowrk. I probably should have thrown in a few more
> keywords.
>
> Is RTL synthesizable, or is it just for simulation?
>
> --
> Grant Edwards grante Yow! I'm sitting on my
> at SPEED QUEEN... To me,
> visi.com it's ENJOYABLE... I'm
> WARM... I'm VIBRATORY...
Reply by Grant Edwards●November 2, 20052005-11-02
On 2005-11-02, Eric Smith <eric@brouhaha.com> wrote:
>> Is RTL synthesizable, or is it just for simulation?
>
> RTL isn't a specific language, it's a level of abstraction.
Thanks. Got it. I thought it was a specific language, but
couldn't find anything concrete about it.
--
Grant Edwards grante Yow! .. over in west
at Philadelphia a puppy is
visi.com vomiting...
Reply by ●November 2, 20052005-11-02
Grant Edwards wrote:
> Is RTL synthesizable, or is it just for simulation?
RTL isn't a specific language, it's a level of abstraction. I'm not
sure of a formal definition, but in general it involves defining
registers and the data paths and conbinatorial logic that links them.
RTL code would most commonly be written in Verilog or VHDL, though other
suitable languages exist. Normally an RTL design should be
sythesizable; the non-synthesizable constructs in the HDLs generally
aren't appropriate for an RTL design. An obvious example would be a
VHDL statement such as "wait 5 ns"; such a statement isn't consistent
with RTL.
Eric
Reply by Grant Edwards●November 2, 20052005-11-02
On 2005-11-02, Noel Henson <noel@noels-lab.com> wrote:
>>> Is there anybody give me guidance about RTL implementation of
>>> the complete 68HC11.
>>
>> You want to build an HC11 using resistor-transistor logic?
>
> I believe Vijay is referring to Register Transfer Level
> representation of the HC11. It's essentially a programmatic
> method of simulation.
Ah. I thought it must be something other than
resistor-transistor logic, but all Google came up with was the
German TV netowrk. I probably should have thrown in a few more
keywords.
Is RTL synthesizable, or is it just for simulation?
--
Grant Edwards grante Yow! I'm sitting on my
at SPEED QUEEN... To me,
visi.com it's ENJOYABLE... I'm
WARM... I'm VIBRATORY...
Reply by Noel Henson●November 2, 20052005-11-02
Grant Edwards wrote:
> On 2005-11-02, harivj <harivj@rediffmail.com> wrote:
>
>> Is there anybody give me guidance about RTL implementation of
>> the complete 68HC11.
>
> You want to build an HC11 using resistor-transistor logic?
>
I believe Vijay is referring to Register Transfer Level representation of
the HC11. It's essentially a programmatic method of simulation.
-- Noel Henson
www.noels-lab.com Chips, firmware and embedded solutions
www.vimoutliner.org Work fast. Think well.