On 2018-03-15 18:35, Robert Armstrong via cctalk wrote:
>> You might look up Nick Tredennick's book "Microprocessor Logic Design:
>> The Flowchart Method" which is sold at Amazon for an obscene price
>
> FWIW, there are several copies on Abe Books ranging in price from "only"
> $800 (a
>You might look up Nick Tredennick's book "Microprocessor Logic Design:
>The Flowchart Method" which is sold at Amazon for an obscene price
FWIW, there are several copies on Abe Books ranging in price from "only" $800
(a steal!) to almost $1200.
I'd love to read it, but that's ludicrous.
On 3/15/18, 9:29 AM, "cctech on behalf of Veit, Holger via cctech"
wrote:
You might look up Nick Tredennick's book "Microprocessor Logic Design:
The Flowchart Method" which is sold at Amazon for an obscene price - but
On 2018-03-15 09:29, Veit, Holger via cctalk wrote:
> You might look up Nick Tredennick's book "Microprocessor Logic Design:
> The Flowchart Method" which is sold at Amazon for an obscene price - but
> maybe some university library has a copy. It's focus is on a methodology
> for designing
You might look up Nick Tredennick's book "Microprocessor Logic Design:
The Flowchart Method" which is sold at Amazon for an obscene price - but
maybe some university library has a copy. It's focus is on a methodology
for designing microcode, and it uses the design of the single chip 370
to
ken said
>>> I am not at liberty to post the document.
>>
>>This?
> ...
>>Also:
> ...
>>If so, it might be this:
> ...
>
> There's a difference between "I am not at liberty..." and "what anyone
> can google...".
The Wayback Machine has it on archive.org
On Tue, Mar 13, 2018 at 6:40 PM, Fred Cisin wrote:
> On Tue, 13 Mar 2018, Ken Seefried via cctalk wrote:
I am not at liberty to post the document.
>>>
>>> This?
>>
>> ...
>>>
>>> Also:
>>
>> ...
>>>
>>> If so, it might be this:
>>
>> ...
>> There's a difference
On Tue, 13 Mar 2018, Ken Seefried via cctalk wrote:
I am not at liberty to post the document.
This?
...
Also:
...
If so, it might be this:
...
There's a difference between "I am not at liberty..." and "what anyone
can google...".
There do exist situations where somebody is NOT at liberty
>> I am not at liberty to post the document.
>
>This?
...
>Also:
...
>If so, it might be this:
...
There's a difference between "I am not at liberty..." and "what anyone
can google...".
-Original Message-
From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Paul Berger
via cctalk
Sent: Monday, March 12, 2018 1:41 PM
To: Guy Sotomayor Jr via cctalk
Subject: Re: XT/370 microcode
The IBM Systems Journal article does not go into great detail but says
On 12 March 2018 at 18:41, Paul Berger via cctalk wrote:
> I am not at liberty to post the document.
This?
http://ieeexplore.ieee.org/document/5387781/?reload=true
Also:
https://www.researchgate.net/publication/224102395_System370_capability_in_a_desktop_computer
If
The IBM Systems Journal article does not go into great detail but says
that a complex of three separate processors are used, a modified 68000
that executes "a large subset of 370 instructions", a standard 68000 to
emulate the remainder odf the instructions and a modified 8087 to
execute the
> On Mar 12, 2018, at 9:57 AM, Eric Smith via cctalk
> wrote:
>
> On Mon, Mar 12, 2018 at 10:54 AM, emanuel stiebler via cctalk <
> cctalk@classiccmp.org> wrote:
>
>> On 2018-03-12 15:49, Eric Smith via cctalk wrote:
>>> As the most obvious example of the impedance
On Mon, Mar 12, 2018 at 10:54 AM, emanuel stiebler via cctalk <
cctalk@classiccmp.org> wrote:
> On 2018-03-12 15:49, Eric Smith via cctalk wrote:
> > As the most obvious example of the impedance mismatch between 370
> > architecture and 68000 microarchitecture, the 68000 is hardwired to have
> >
On 2018-03-12 15:49, Eric Smith via cctalk wrote:
> As the most obvious example of the impedance mismatch between 370
> architecture and 68000 microarchitecture, the 68000 is hardwired to have
> eight each data and address registers, not sixteen GPRs, and microcode
> can't easily paper over that.
On 2018-03-12 15:49, Eric Smith via cctalk wrote:
> As the most obvious example of the impedance mismatch between 370
> architecture and 68000 microarchitecture, the 68000 is hardwired to have
> eight each data and address registers, not sixteen GPRs, and microcode
> can't easily paper over that.
Some of the code is now on bitsavers..
Dave
From: Eric Smith <space...@gmail.com>
Sent: 12 March 2018 14:41
To: Dave Wade <dave.g4...@gmail.com>; General Discussion: On-Topic and
Off-Topic Posts <cctalk@classiccmp.org>
Cc: Lars Brinkhoff <l...@nocrew.org>
Subje
As the most obvious example of the impedance mismatch between 370
architecture and 68000 microarchitecture, the 68000 is hardwired to have
eight each data and address registers, not sixteen GPRs, and microcode
can't easily paper over that.
Similarly, the 8087 microarchitecture has hardwired
On Mon, Mar 12, 2018, 05:13 Dave Wade via cctalk
wrote:
> . Wikipedia says there were/are
> 2x68000 CPU's..
>
One Motorola chip was the custom one, the other was normal (as indicated by
mask code). There was also an Intel math co, presumably derived from 8087.
I used to
Lars Brinkhoff wrote:
> Does someone have good connections with people inside IBM? I'd like to
> ask about 68000 microcode for the XT/370 product.
Martin Ziskind says he has floppy disks with VM/PC, but no way to read
them.
I don't suppose any one left in IBM has any knowledge of this. Perhaps no
one ever did and it was all done by Motorola. Wikipedia says there were/are
2x68000 CPU's..
.. I would ask on IBM Main...
http://www.cpushack.com/2013/03/22/cpu-of-the-day-ibm-micro-370/
seems to have some names..
Dave
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