Paul and others said
>> What if you can't make ICs any more? Or rather, what level of IC
>> fabrication would it be possible to construct from scratch?
> For semiconductors, you'd start with machinery to make ultra-pure materials
> (silicon, I'd assume). A Czochralski crystal growing machine to
Another PDP-8E? You are very lucky :)
On 4/6/2022 1:06 PM, Lyle Bickley via cctalk wrote:
I recently acquired another PDP-8/E and wanted to test basic CPU functions and
memory before I added peripherals. There are some available short "memory
tests" online, but most don't have have the
> On Apr 2, 2022, at 6:27 AM, Liam Proven via cctalk
> wrote:
>
> On Sat, 2 Apr 2022 at 00:34, Bill Gunshannon via cctalk
> wrote:
>>
>> And, as you say, an Arduino or a Pi that fits in my pocket is orders
>> of magnitude more powerful and costs pocket money.
>
> The comparisons of size,
Continuing the debugging of my recently acquired PDP-8/E, I wrote an address
test that's easy to enter from the front panel:
---
# PDP8 Quick Address Test
# Pass 1: Loads locations 23- with their own address.
# Pass 2: Tests each location for the correct address. If
# it fails (address does
I recently acquired another PDP-8/E and wanted to test basic CPU functions and
memory before I added peripherals. There are some available short "memory
tests" online, but most don't have have the flexibility to test multiple data
patterns by design.
The test below does a classic checkerboard
On 4/6/22 08:27, Paul Koning via cctalk wrote:
That's a classic example of a rule invented by people who can't think. In
fact, HTTP is perfectly fine for sites that arenot conducting web-based
business activity. Blogs are a good example, and I know at least one that runs
HTTP for the
Noel Chiappa wrote:
> I have been told that at one point Google was 'downgrading' results
> that used plain HTTP, instead of HTTPS, because they were trying to
> push people to switch to HTTPS (this was when everyone was
> hyperventilating over the Snowden revelations). Given the
> near-ubiquitous
On 2022-04-06 9:27 a.m., Paul Koning via cctalk wrote:
On Apr 6, 2022, at 9:20 AM, Noel Chiappa via cctalk
wrote:
...
I have been told that at one point Google was 'downgrading' results that used
plain HTTP, instead of HTTPS, because they were trying to push people to
switch to HTTPS (this
> On Apr 6, 2022, at 9:20 AM, Noel Chiappa via cctalk
> wrote:
>
> ...
> I have been told that at one point Google was 'downgrading' results that used
> plain HTTP, instead of HTTPS, because they were trying to push people to
> switch to HTTPS (this was when everyone was hyperventilating
I like the fact that https://williambader.com/museum/vax/pdphistory.html
shows a cover image plus identifies the marking on the back cover
("EB-17525-20/79 070-14-55").
https://authors.library.caltech.edu/5363/1/MARprocieee06.pdf cites it in the
same manner. Apparently the editors at Proc IEEE
> the later "pdp11 bus hanbook" (which, as mentioned, does not seem to be
> online yet, alas)
Arck, I'm a moron; Paul has pointed out to me that this is, in fact, online
at Bitsavers:
http://www.bitsavers.org/pdf/dec/pdp11/handbooks/PDP11_BusHandbook1979.pdf
It didn't show up in a
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