On Tue, Aug 24, 2021 at 01:38:33AM +0100, Tom Stepleton via cctalk wrote:
> For the sake of illustration to folks who are not necessarily used to
> thinking about what computers do at the machine code level, I'm interested
> in collecting examples of single instructions for any CPU architecture
>
Hello Rob,
FreeCAD is nice for modeling 3D shapes.
For 3D printing, depending on the technology of 3D printer, you need to process
original model to convert compact sections into hollow honeycomb structure, and
add small plastic bars into empty volumes to support the model while it's
printed.
On Mon, 23 Aug 2021, shad via cctech wrote:
Hello Rob,
FreeCAD is nice for modeling 3D shapes.
Not if you've ever used a commercial product that does the same job. ;)
For 3D printing, depending on the technology of 3D printer, you need to
process original model to convert compact
On Mon, Aug 23, 2021 at 10:29 PM shad via cctech
wrote:
>
>
> For 3D printing, depending on the technology of 3D printer, you need to
> process original model to convert compact sections into hollow honeycomb
> structure, and add small plastic bars into empty volumes to support the model
>
On 8/23/21 3:29 PM, shad via cctech wrote:
Hello Rob,
FreeCAD is nice for modeling 3D shapes.
For 3D printing, depending on the technology of 3D printer, you need to process
original model to convert compact sections into hollow honeycomb structure, and
add small plastic bars into empty
Rob asked
> I think I may need to get a small part 3d printed (some plastic board
> mounting guide rails from a PDP 11/24 H7140 PSU). What software is best for
> a novice? Preferably free!
I've found OpenSCAD to be perfect for things like brackets, machine parts and
so on. It's no good for
DSP processors, like the 2100 series of Analog Devices, one single instruction
that would take value from one array and multiply it by a value from another
array and then add it to another array, while incrementing the indexes.
I'd say that was CISC like.
Dwight
At 04:13 AM 8/24/2021, Peter Corlett via cctalk wrote:
>move.b ([0x12345678, %pc, %d0.w*8], 0x9abcdef0), ([0x87654321, %sp], %a0*4,
>0x0fedcba9)
And which language and compiler case was this aimed at?
Wasn't that a primary driver for complex CISC instructions? That if it
happened often
On Mon, Aug 23, 2021 at 09:09:55PM -0400, Paul Koning via cctalk wrote:
>
>
> > On Aug 23, 2021, at 8:38 PM, Tom Stepleton via cctalk
> > wrote:
> >
> > Hello,
> >
> > For the sake of illustration to folks who are not necessarily used to
> > thinking about what computers do at the machine
On 8/24/21 3:34 AM, Diane Bruce via cctalk wrote:
> Indeed. Just its addressing modes, with indirection and two separate register
> indexing operations, are hairy enough. Then consider the decimal arithmetic
> instructions that might have up to 6 operands.
>
> And who can ever forget the built
On Tue, Aug 24, 2021 at 11:38:42AM -0400, Paul Koning wrote:
>
>
> > On Aug 24, 2021, at 6:34 AM, Diane Bruce wrote:
> >
> > On Mon, Aug 23, 2021 at 09:09:55PM -0400, Paul Koning via cctalk wrote:
> >>
> >>
> >>> On Aug 23, 2021, at 8:38 PM, Tom Stepleton via cctalk
> >>> wrote:
> >>>
...
On Tue, 2021-08-24 at 15:55 +, dwight via cctalk wrote:
> DSP processors, like the 2100 series of Analog Devices, one single
> instruction that would take value from one array and multiply it by a
> value from another array and then add it to another array, while
> incrementing the indexes.
As a followup, I did find the following article about the Saxpy Matrix-1:
https://techmonitor.ai/techonology/the_saxpy_affair_and_why_we_all_have_to_worry_about_the_theft_of_its_secrets
--Chuck
> On Aug 24, 2021, at 11:57 AM, Peter Corlett via cctalk
> wrote:
>
> On Tue, Aug 24, 2021 at 08:47:33AM -0500, John Foust via cctalk wrote:
>> At 04:13 AM 8/24/2021, Peter Corlett via cctalk wrote:
>>> move.b ([0x12345678, %pc, %d0.w*8], 0x9abcdef0), ([0x87654321, %sp], %a0*4,
>>>
Hi Tom,
Well for me the VAX has some of the most interesting instructions, so the POLY
instruction will evaluate a polynomial and EMOD will multiply and separate the
integer and fractional parts.
I also find it interesting that some architectures will only allow the
privilege state to be
On Tue, 24 Aug 2021, Tom Stepleton via cctalk wrote:
Hello,
For the sake of illustration to folks who are not necessarily used to
thinking about what computers do at the machine code level, I'm interested
in collecting examples of single instructions for any CPU architecture that
are unusually
> On Aug 24, 2021, at 6:34 AM, Diane Bruce wrote:
>
> On Mon, Aug 23, 2021 at 09:09:55PM -0400, Paul Koning via cctalk wrote:
>>
>>
>>> On Aug 23, 2021, at 8:38 PM, Tom Stepleton via cctalk
>>> wrote:
>>>
>>> Hello,
>>>
>>> For the sake of illustration to folks who are not necessarily
On 8/24/21 10:40 AM, Van Snyder via cctalk wrote:
> That's the BLAS SAXPY (or DAXPY) routine, a fundamental step in
> Gaussian elimination.
Speaking of which, do any specimens of the Saxpy Matrix-1 still exist?
Saxpy Computer was a brief flash in the supercomputing universe; fell
onto bad times
On Tue, Aug 24, 2021 at 08:47:33AM -0500, John Foust via cctalk wrote:
> At 04:13 AM 8/24/2021, Peter Corlett via cctalk wrote:
>> move.b ([0x12345678, %pc, %d0.w*8], 0x9abcdef0), ([0x87654321, %sp], %a0*4,
>> 0x0fedcba9)
> And which language and compiler case was this aimed at?
I have no idea
On Fri, Aug 20, 2021 at 7:55 AM Paul Koning wrote:
>
>
> > On Aug 19, 2021, at 7:39 PM, Charles Dickman via cctalk <
> cctalk@classiccmp.org> wrote:
> >
> > There are indications in the KDJ11-B processor spec on bitsavers that the
> > M8190 could be used in a multiprocessor configuration. For
> On Aug 23, 2021, at 8:38 PM, Tom Stepleton via cctalk
> wrote:
>
> Hello,
>
> For the sake of illustration to folks who are not necessarily used to
> thinking about what computers do at the machine code level, I'm interested
> in collecting examples of single instructions for any CPU
On Tue, 2021-08-24 at 11:11 -0700, Chuck Guzis via cctalk wrote:
> On 8/24/21 10:40 AM, Van Snyder via cctalk wrote:
>
> > That's the BLAS SAXPY (or DAXPY) routine, a fundamental step in
> > Gaussian elimination.
>
> Speaking of which, do any specimens of the Saxpy Matrix-1 still
> exist?
>
On Tue, 24 Aug 2021, Bill Degnan wrote:
Fred,
Just for the purpose of imaging the disks, is there any reason I cant treat
these disks like any other 5 1/4" cpm 360k disk?
Bill
Treat them just like any other 5.25" MFM CP/M disk.
IIRC, the 48TPI ones are 400K, with 512 bytes per sector, 10
Fred,
Just for the purpose of imaging the disks, is there any reason I cant treat
these disks like any other 5 1/4" cpm 360k disk?
Bill
On Fri, Aug 20, 2021, 9:09 PM Fred Cisin via cctech
wrote:
> On Fri, 20 Aug 2021, Bill Degnan via cctech wrote:
> > Is there a simh for the otrona attache? I
On Tue, 24 Aug 2021, Fred Cisin via cctech wrote:
The 96tpi ones are 800K, and should be treated like any other "Quad Density"
CP/M disk.
Just for my own curiosity, can a "typical" high-density 5.25" drive
correctly image a 96tpi disk?
Thanks Fred!
g.
--
Proud owner of F-15C 80-0007
The Hitachi SH4 has a set of pipelineable vector instructions that
work on 4x4 and 4x1 length vectors (implemented as 2 sets of 16 FP
registers). Nothing compared to MMX/SSE/AVX, but relatively complex.
On 8/23/2021 8:51 PM, Van Snyder via cctech wrote:
On Tue, 2021-08-24 at 01:38 +0100, Tom Stepleton via cctalk wrote:
For the sake of illustration to folks who are not necessarily used to
thinking about what computers do at the machine code level, I'm
interested
in collecting examples of single
Back in the 2007 time frame, Andrew Lynch had written a utility to read
Vector Graphic hard-sectored diskettes on a Catweasel board. Called "CWVG",
does anyone have a copy of the program?
Mike Loewen mloe...@cpumagic.scol.pa.us
Old Technology
Another interesting architecture, not sure if it quite fits your question: the
orthogonal computer. You could think of that as vector processor with serial
arithmetic -- a cross of a Cray-1 and a PDP-8/S :-) It was invented in the
1960s by William Shooman, and sold for a time by Sanders
The 96tpi ones are 800K, and should be treated like any other "Quad
Density" CP/M disk.
On Tue, 24 Aug 2021, geneb via cctech wrote:
Just for my own curiosity, can a "typical" high-density 5.25" drive correctly
image a 96tpi disk?
USUALLY.
Either the drive needs to be able to switch to 300
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