I have been thinking about this discussion: I bought one of the cheap 8
channel units on Ebay and downloaded the Salee software. It works
extremely well for debugging logic issues on my pdp8/L's but it has a
few issues:
The buffer size is miniscule, and I get data overruns at higher sample
ra
> This is easy since it is an I/O bus. The instructions are GETB, PUTB, STAT
> and CTRL. In any case the corresponding control line is asserted.
> This means, a PUTB will put the device address on the X/Y lines, the data
> byte onto the Bus Out lines, and assert Put Strobe.
> Oh yes, one interestin
A brief description of "built-in" FPGA logic analysers seems worthwhile, a
valuable if non-trivial option.
Most FPGA vendors provide IP to implement in vivo logic analysers organically
in the FPGA fabric. Additionally, they provide a GUI to display / capture the
data and to interactively confi
The DEC DF02 (300 Baud) and DF03 (300/1200 Baud) modems appear to be
singularly lacking in online documentation. In the case of the DF03 those
would be:
EK-ODF03-IP - DF03 Illustrated Parts Breakdown
EK-ODF03-PS - DF03 Modem Pocket Service Guide
EK-ODF03-UG - DF03 Modem Users Guide
Similarly for
On Tue, Mar 14, 2023 at 09:16:02PM +, Jonathan Chapman via cctalk wrote:
[...]
> It's nice to support the designers in some capacity, but buying knockoffs
> fuels the ecosystem that creates knockoffs. With our stuff, it's never
> been that a single knockoff operation eats our lunch, it's that t
If you posted your design as Open Source, someone else producing it
isn't a knockoff, it's the system working as intended.
-- Chris
I remember a talk by LadyADA of Adafruit at HOPE about starting a company
making open source hardware and success and all that. It's easy if you
have the market
On 3/14/23 22:55, Bill Degnan via cctalk wrote:
I am working on an unknown status Persci 299 drive and one of the two
drives is locked closed. Is this a "park" of some kind or is the drive
broken? If it's a parked drive (only the drive 0 side) how do you unpark
the drive? I can't seem to find
On Wed, Mar 15, 2023 at 11:48 AM Jon Elson via cctalk
wrote:
> On 3/14/23 22:55, Bill Degnan via cctalk wrote:
> > I am working on an unknown status Persci 299 drive and one of the two
> > drives is locked closed. Is this a "park" of some kind or is the drive
> > broken? If it's a parked drive
I just wanted to say that the CHM is great. The exhibits are wonderfully done,
and yes, don't miss the 1401 demo if you can. But there is a lot, starting with
Hollerith machines and ENIAC panels all the way to more contemporary items.
-Erik
Will do ! Thank you
Regards,
Tarek Hoteit
> On Mar 15, 2023, at 9:37 AM, ebruchez--- via cctalk
> wrote:
>
> I just wanted to say that the CHM is great. The exhibits are wonderfully
> done, and yes, don't miss the 1401 demo if you can. But there is a lot,
> starting with Hollerith machines
On 3/15/2023 10:05 AM, Ethan O'Toole via cctalk wrote:
If you posted your design as Open Source, someone else producing it
isn't a knockoff, it's the system working as intended.
-- Chris
I remember a talk by LadyADA of Adafruit at HOPE about starting a
company making open source hardware and
I no longer have a use for the following 2 books. Free for the taking.
Solaris Internals: Solaris 10 and Opensolaris
Solaris Performance and tools
Email me at: tpisek at pobox dot com
They have a new home
Still catching up.
> Date: Fri, 10 Mar 2023 06:39:16 +
> From: Lars Brinkhoff via cctalk
> I believe the term minicomputer was first applied to the PDP-8. It was kind
> of retroactively applied going back to the PDP-1. Whether the PDP-10 is a
> mini is sometimes hotly debated. IBM people
Jumping in late because the list blew up so badly on this topic. Yes, others
have already commented on these things, but I'll add my US$0.02 worth anyway.
> Date: Thu, 9 Mar 2023 16:00:05 -0600
> From: Steve Lewis via cctalk
> Actually, to answer my own question: if "main frame" refers to the
> On Mar 15, 2023, at 6:55 PM, Rich Alderson via cctalk
> wrote:
>
> ...
>> (another notion is that mainframes are "multi-user" -- most early
>> microcomputers were not multi-user, as they just barely supported the needs
>> of one user; I'm not sure if the very first minicomputers were multi
On Wed, Mar 15, 2023 at 4:11 PM Rich Alderson via cctalk <
cctalk@classiccmp.org> wrote:
> The term "minicomputer" was marketing speak: The first computer to
> receive the
> appellation was the PDP-8/e, which was the third generation of the PDP-8
> family
> (where the PDP-5 is "generation zero").
> On Mar 14, 2023, at 10:57 PM, Jonathan Chapman via cctalk
> wrote:
>
>> If you posted your design as Open Source, someone else producing it isn't a
>> knockoff, it's the system working as intended.
>
> What is it when the design is open source, but they're not complying with the
> terms
On Mar 15, 2023, at 3:55 PM, Rich Alderson via cctalk
wrote:
>
> The term "minicomputer" was marketing speak: The first computer to receive
> the
> appellation was the PDP-8/e, which was the third generation of the PDP-8
> family
> (where the PDP-5 is "generation zero"). The first generation
On 3/15/23 18:32, Paul Koning via cctalk wrote:
Apart from spooling, which uncouples slow I/O from execution, there is also
"multiprogramming", which means being able to run more than one job
concurrently. Timesharing does that, of course, but I think multiprogramming was
intended to refer t
A friend gave me a DEC VK100 (aka GiGi) recently. It's in really nice
shape, but it is missing the power supply. Before I try to kludge something
up with an ATX supply, I thought I'd ask if anybody knows where I might find
an official replacement.
Thanks,
Bob
> A friend gave me a DEC VK100 (aka GiGi) recently. It's in really nice
> shape, but it is missing the power supply. Before I try to kludge
> something up with an ATX supply, I thought I'd ask if anybody knows
> where I might find an official replacement.
The board in the supply is an Astec, s
Thanks for the picture. AFAIK this supply wasn't used in anything other than
the VK100 so that's the only source for a direct replacement.
Kludging something up with a modern supply looks fairly easy; there's plenty
of room in there, but it will be ugly. Don't know what I'll do about the fan
P.S. Oh, and no - I don't have the subchassis for the supply, nor the fan,
switch, IEC inlet or any of that fancy stuff.
On Wed, Mar 15, 2023 at 7:25 PM bob--- via cctalk wrote:
>
> P.S. Oh, and no - I don't have the subchassis for the supply, nor the fan,
> switch, IEC inlet or any of that fancy stuff.
Maybe something like a MEAN WELL RPT-60B open frame power supply would
be easier to fit into the enclosure than
> On 3/15/23 18:32, Paul Koning via cctalk wrote:
>
> Apart from spooling, which uncouples slow I/O from execution, there is
> also "multiprogramming", which means being able to run more than one
> job concurrently. Timesharing does that, of course, but I think
> multiprogramming was intended to r
> Kludging something up with a modern supply looks fairly easy; there's
> plenty of room in there, but it will be ugly. Don't know what I'll
> do about the fan, but the VK100 logic itself probably doesn't need a
> fan so whatever is built into the ATX will be enough.
At least the ATX won't be
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