From: Gavin Scott
Subject: [cctalk] 50 Years of the HP 3000
Well, here we are. If you boot up a classic HP 3000 system and simply
hit return when it asks you for the date and time, it will default to:
As it turns out, I have a complete, working HP 3000 917/LX system, with
printers, a line
Paul said “But the DZ doesn't do DMA.”
I apologize. I used DZ in responses when i meant DH.
Sent from my iPhone
> On Nov 1, 2022, at 11:56, Paul Koning via cctalk
> wrote:
>
>
>
>> On Nov 1, 2022, at 2:32 PM, ben via cctalk wrote:
>>
>> On 2022-11-01 11:20 a.m., Paul Koning via
Sent from my iPhone
> On Nov 1, 2022, at 10:01, Wayne S wrote:
>
> Hi Paul. Who “corrected” you about DMA input? I’d like to read about that as
> nothing i read about the DZ mentioned that. Got any Cites?
>
> Sent from my iPhone
>
>> On Nov 1, 2022, at 09:01, Paul Koning via cctalk
>>
On Tue, Nov 1, 2022 at 12:01 PM Paul Koning via cctalk
wrote:
> > On Oct 30, 2022, at 2:49 PM, Wayne S via cctalk
> > wrote:
> >
> > The difference between dz and dh interfaces is that the dh used dma instead
> > of interrupts to get characters to the cpu...
>
> No, it doesn't. I was confused
Hi Paul. Who “corrected” you about DMA input? I’d like to read about that as
nothing i read about the DZ mentioned that. Got any Cites?
Sent from my iPhone
> On Nov 1, 2022, at 09:01, Paul Koning via cctalk
> wrote:
>
>
>
>> On Oct 30, 2022, at 2:49 PM, Wayne S via cctalk
>> wrote:
>>
> On Nov 1, 2022, at 1:05 PM, Wayne S wrote:
>> ...
>>> On Nov 1, 2022, at 09:01, Paul Koning via cctalk
>>> wrote:
>>>
>>>
>>>
> On Oct 30, 2022, at 2:49 PM, Wayne S via cctalk
> wrote:
The difference between dz and dh interfaces is that the dh used dma
> On Nov 1, 2022, at 2:32 PM, ben via cctalk wrote:
>
> On 2022-11-01 11:20 a.m., Paul Koning via cctalk wrote:
> tents. The result is that the OS only has to deal with the device every 30
> characters or so (RSTS case) or even less often if the buffer size is larger.
>> Consider disk for
Just to clarify, my surmising was in response to “ The DH11 does DMA output,
but not DMA input. ” in one of the earlier messages.
Sent from my iPhone
> On Nov 1, 2022, at 12:03, Wayne S wrote:
>
> Paul said “But the DZ doesn't do DMA.”
> I apologize. I used DZ in responses when i meant DH.
On 24/10/2022 21:07, Antonio Carlini via cctalk wrote:
the bitsbox one may be a teensy bit to large but the ebay one should
fit nicely. Neither is too expensive even with postage so I'll buy a
few, given that I do have a fair few PSUs knocking around.
Turns out both sets of X2 caps I bought
On 2022-11-01 11:20 a.m., Paul Koning via cctalk wrote:
tents. The result is that the OS only has to deal with the device every
30 characters or so (RSTS case) or even less often if the buffer size is
larger.
Consider disk for another example. With very rare exceptions, disks do DMA: the OS
> On Nov 1, 2022, at 3:38 PM, Ethan Dicks via cctalk
> wrote:
>
> On Tue, Nov 1, 2022 at 12:01 PM Paul Koning via cctalk
> wrote:
>>> On Oct 30, 2022, at 2:49 PM, Wayne S via cctalk
>>> wrote:
>>>
>>> The difference between dz and dh interfaces is that the dh used dma instead
>>> of
On 24/10/2022 21:07, Antonio Carlini via cctalk wrote:
the bitsbox one may be a teensy bit to large but the ebay one should
fit nicely. Neither is too expensive even with postage so I'll buy a
few, given that I do have a fair few PSUs knocking around.
Turns out both sets of X2 caps I bought
On 11/1/2022 11:49 AM, Ethan Dicks via cctalk wrote:
I don't think the 11/750 could have handled that many users on DZ-11s.
I think this is why COMM-IO-P systems were sold. They basically acted
like front end processors for a stack of DZ11's to interface to a Unibus
system.
Problem was
> On Nov 1, 2022, at 7:59 PM, Chris Zach via cctalk
> wrote:
>
> On 11/1/2022 11:49 AM, Ethan Dicks via cctalk wrote:
>> I don't think the 11/750 could have handled that many users on DZ-11s.
>
> I think this is why COMM-IO-P systems were sold. They basically acted like
> front end
HKJC, now there's a designation I haven't seen in many years.
Were you on that project? I oddly enough have a report that was a root
cause analysis as to the failure of the whole thing. Fascinating
reading, it's like a 1970's DEC CSS hardware orgy gone mad.
C
Thank you Rich for shedding light on this. Most of it makes sense to me,
but the secrecy part where you weren't allowed to talk to those still at
the museum is weird. I can't see any possible commercial reason for
preventing former engineering staff to talk with their former colleagues or
Well, here we are. If you boot up a classic HP 3000 system and simply
hit return when it asks you for the date and time, it will default to:
HP32002E.01.00
WHICH OPTION ? COO
ANY CHANGES? N
DATE (M/D/Y)?
WED, NOV 1, 1972, 12:00 AM
LOG FILE NUMBER 64 ON
*WELCOME*
:HELLO OPERATOR.SYS;HIPRI
> Date: Sun, 30 Oct 2022 21:50:42 -0700
> From: Sellam Abraham via cctalk
> I'm hoping Rich Alderson will pipe in and give us the actual story as to
> what's going on with the LCM and its collection, but there's a possibility
> that he may be legally constricted from giving comment at this time.
Thank you for sheding some light on what transpired.
Regards,
Pontus
On 2022-11-01 00:31, Rich Alderson via cctalk wrote:
First, let me thank Sellam and Tom for inviting me to comment on this
topic.
LCM+L closed its doors to the public in March 2020, at the height of
the
initial pandemic
On Sun, Oct 30, 2022 at 2:49 PM Wayne S via cctalk
wrote:
> The difference between dz and dh interfaces is that the dh used dma instead
> of interrupts to get characters to the cpu. It would be transparent to any
> software.
> I did a write up on them 40 years ago justifying the replacement of
> On Oct 30, 2022, at 2:49 PM, Wayne S via cctalk wrote:
>
> The difference between dz and dh interfaces is that the dh used dma instead
> of interrupts to get characters to the cpu. It would be transparent to any
> software.
No, it doesn't. I was confused about this but was recently
21 matches
Mail list logo
