I had accounts on a MicroVAX 2 and a VAX 11/750. The microvax was faster
for most compute jobs, but the 750 with 1/4 the memory handled more users
mostly in text editors with the occasional compile or nroff/troff jobs.
IIRC, the 750 had faster disks...
Warner
On Sun, Jan 2, 2022, 9:35 PM Zane
Yup. The 8600's (UMBC1 and 2) were connected to Bitnet, and I was a
little Bitnaught until I found AI. It might have connected through the
Gandalf network or something else, I'd have to check old printouts.
Can I ask for a rough translation in to comparative VAX Units of
Performance (VUPs)?
On Sun, Jan 2, 2022 at 11:31 PM Chris Zach via cctalk
wrote:
> Oh yes, the 730 is probably the neatest little "pocket Vax". Especially
> if you have the R80 drive as well as the RL02. The R80 did not use the
> Unibus, correct?
Correct. The R80 connects to the RB730 controller which has its own
Maybe you were thinking the 11/73? I think the 83 was quicker, and the
93/94 hit the 1 VUP speed...
C
On 1/2/2022 11:35 PM, Zane Healy wrote:
The worst part is I know it’s 0.9 VUPS.
Zane
On Jan 2, 2022, at 6:36 PM, Toby Thain via cctalk wrote:
On 2022-01-02 9:33 p.m., Chris Zach via
The worst part is I know it’s 0.9 VUPS.
Zane
> On Jan 2, 2022, at 6:36 PM, Toby Thain via cctalk
> wrote:
>
> On 2022-01-02 9:33 p.m., Chris Zach via cctalk wrote:
>> Microvax 2 is .9 vup.
>
> Oops, Zane vupped up.
>
>> C
>>> On January 2, 2022 9:10:39 PM EST, Grant Taylor via cctalk
The VAX-11/780 may be very slow, but it is still still quite a bit faster than
my 11/730. That being said, the 11/730 captures the look and feel of that era
of VAX in a much smaller volume and with a lot lower energy cost.
Oh yes, the 730 is probably the neatest little "pocket Vax".
On 2022-01-02 9:33 p.m., Chris Zach via cctalk wrote:
Microvax 2 is .9 vup.
Oops, Zane vupped up.
C
On January 2, 2022 9:10:39 PM EST, Grant Taylor via cctalk
wrote:
On 1/2/22 6:18 PM, Zane Healy via cctalk wrote:
VAX-11/780 = 1 VUP
VAX-11/782 = 1.8 VUP
MicroVAX 1 = 0.3 VUP
MicroVAX 2
Microvax 2 is .9 vup.
C
On January 2, 2022 9:10:39 PM EST, Grant Taylor via cctalk
wrote:
>On 1/2/22 6:18 PM, Zane Healy via cctalk wrote:
>> VAX-11/780 = 1 VUP
>> VAX-11/782 = 1.8 VUP
>> MicroVAX 1 = 0.3 VUP
>> MicroVAX 2 = 0.7 VUP
>
>Thank you Zane.
>
>
>
>--
>Grant. . . .
>unix || die
--
On Sat, Jan 1, 2022, 12:33 Paul Koning via cctalk
wrote:
> Largely true, but some disk drives (RP06? RP04?) use 3-phase spindle
> motors.
>
The RP06 has 3-phase power input (and output, phase-rotated, for a second
drive), but uses a single phase spindle motor. The US version runs the
spindle
On 1/2/22 6:59 PM, ben via cctalk wrote:
But can the Pi handle a gazillion students all time sharing at once
@ 2400?
I think that will depend on how you connect the serial terminals.
I know that it's possible to establish network connectivity to serial
terminal servers. I don't know how
On 1/2/22 6:18 PM, Zane Healy via cctalk wrote:
VAX-11/780 = 1 VUP
VAX-11/782 = 1.8 VUP
MicroVAX 1 = 0.3 VUP
MicroVAX 2 = 0.7 VUP
Thank you Zane.
--
Grant. . . .
unix || die
On 2022-01-02 6:28 p.m., Zane Healy via cctalk wrote:
On Jan 2, 2022, at 5:20 PM, Nigel Johnson Ham via cctalk
wrote:
I've always felt that in terms of performance the proper measure would have
been VUPS/kW :-)
That way my little MicroVAX 2 would be able to hold its head high!
On that
On Jan 2, 2022, at 5:20 PM, Nigel Johnson Ham via cctalk
wrote:
>
> I've always felt that in terms of performance the proper measure would have
> been VUPS/kW :-)
>
> That way my little MicroVAX 2 would be able to hold its head high!
On that note a Raspberry Pi 2b running SIMH/VAX is about
I've always felt that in terms of performance the proper measure would
have been VUPS/kW :-)
That way my little MicroVAX 2 would be able to hold its head high!
Nigel Johnson, MSc., MIEEE, MCSE VE3ID/G4AJQ/VA3MCU
Amateur Radio, the origin of the open-source concept!
Skype:
> On Jan 2, 2022, at 5:11 PM, Grant Taylor via cctalk
> wrote:
>
> On 1/2/22 5:20 PM, Chris Zach via cctalk wrote:
>> I keep thinking about it, but no. The 780 was neat from a historical
>> perspective, and the 785 at UMBC (UMBC5) ran Ultrix (and was on the ARPANET,
>> not the crappy
On 1/2/22 5:20 PM, Chris Zach via cctalk wrote:
I keep thinking about it, but no. The 780 was neat from a historical
perspective, and the 785 at UMBC (UMBC5) ran Ultrix (and was on the
ARPANET, not the crappy Bitnet the 8600's were on)
Is that Bitnet as in the Because it was there network that
> On Jan 2, 2022, at 4:20 PM, Chris Zach via cctalk
> wrote:
>
> On 1/2/2022 6:21 PM, Mark J. Blair via cctalk wrote:
>> I am seriously lusting after that VAX-11/780 system on eBay
> I keep thinking about it, but no. The 780 was neat from a historical
> perspective, and the 785 at UMBC
> From: Chris Zach
>> Anyone know what an M857 is? I guess it might be a DF11 async answer
>> mode?
> No, it's a single width full height M series board from the early
> 1970's.
Argh, digit swappping on my part.
The _M587_ is in the DN87 FMPS:
Oh ok, you answered it. It's from an 11/20. Weird since I never had one,
Alan Frisbee, didn't you have an 11/20 next to your CR11 reader when I
was over at your place 30 years ago?
Still the question: Anyone need it and willing to trade it for an 8/L
serial cable and card?
On 1/2/2022 11:35
On 1/2/2022 6:21 PM, Mark J. Blair via cctalk wrote:
I am seriously lusting after that VAX-11/780 system on eBay
I keep thinking about it, but no. The 780 was neat from a historical
perspective, and the 785 at UMBC (UMBC5) ran Ultrix (and was on the
ARPANET, not the crappy Bitnet the 8600's
In the unlikely event that I win the lottery before that 11/780 batch sells,
I'm going to buy it, buy a box truck, go pick it up, and then leave the box
truck parked outside while I build a new building to put it all in. :D
--
Mark J. Blair
Blog:https://www.nf6x.net
Git:
> On Jan 2, 2022, at 1:03 PM, Toby Thain via cctalk
> wrote:
>
> On 2022-01-02 2:48 p.m., Noel Chiappa via cctalk wrote:
>> > From: Jonathan Chapman
>> > Last one that went auction-style on eBay went for $1,178.00
>> When was that?
>> Do you have any details of the machine's config?
The poles supplying my rural property just have one phase of 12kV on them, so
even if SCE was willing to provide 3ø service to me, I bet it would be
*expensive* to get the whole line upgraded to 3ø service all the way up to the
last pole with all three phases present. I think that's probably
No, it's a single width full height M series board from the early
1970's. As mentioned it was probably from a DP11 or some other RS232
sync serial device.
C
On 1/2/2022 12:44 PM, Noel Chiappa via cctalk wrote:
> From: Chris Zach
> a M857 board with a RS232 cable on it and
Ah yes! And I am in Arizona too.. Ed#
Sent from the all new AOL app for Android
On Sun, Jan 2, 2022 at 2:12 PM, emanuel stiebler via
cctalk wrote: On 2022-01-02 16:03, Toby Thain via
cctalk wrote:
> On 2022-01-02 2:48 p.m., Noel Chiappa via cctalk wrote:
>> > From: Jonathan
On 1/2/22 12:16 PM, Jonathan Chapman via cctalk wrote:
In North America? Good luck! Part of what got me to buy a
smallish industrial building was needing three phase. It's usually
cheaper/easier to either use a VFD if it's for motor equipment, or a
rotary converter, than trying to get the
On 1/2/22 2:03 PM, Toby Thain via cctalk wrote:
https://i.imgur.com/OjQWk55.jpg
From that last picture, it looks like one of the plugs is five pronged,
and looks very similar to the 120/208V 30A 3ɸ plug in one of the
pictures about the current 780 auction.
I can't tell if the other plug is
On 2022-01-02 16:03, Toby Thain via cctalk wrote:
On 2022-01-02 2:48 p.m., Noel Chiappa via cctalk wrote:
> From: Jonathan Chapman
> Last one that went auction-style on eBay went for $1,178.00
When was that?
Do you have any details of the machine's config?
That's a pretty good
That's the one! Clearly I forgot some of the details.
Thanks,
Jonathan
‐‐‐ Original Message ‐‐‐
On Sunday, January 2nd, 2022 at 16:03, Toby Thain via cctalk
wrote:
> On 2022-01-02 2:48 p.m., Noel Chiappa via cctalk wrote:
>
> > > From: Jonathan Chapman
> >
> > > Last one
On 2022-01-02 2:48 p.m., Noel Chiappa via cctalk wrote:
> From: Jonathan Chapman
> Last one that went auction-style on eBay went for $1,178.00
When was that?
Do you have any details of the machine's config?
That's a pretty good deal for a 780 (IMO).
Someone I know won a '785, Feb
On 1/2/22 11:16 AM, Jonathan Chapman via cctalk wrote:
>> I'd really like 3ɸ at home for a number of different things.
>
> In North America? Good luck! Part of what got me to buy a smallish industrial
> building was needing three phase. It's usually cheaper/easier to either use a
> VFD if it's
> From: Jonathan Chapman
> Last one that went auction-style on eBay went for $1,178.00
When was that?
Do you have any details of the machine's config?
That's a pretty good deal for a 780 (IMO).
Noel
> I'd really like 3ɸ at home for a number of different things.
In North America? Good luck! Part of what got me to buy a smallish industrial
building was needing three phase. It's usually cheaper/easier to either use a
VFD if it's for motor equipment, or a rotary converter, than trying to get
On Sun, Jan 2, 2022 at 9:22 AM Rob Jarratt via cctalk
wrote:
>
> Hmm... There was already a terminator installed. I tried to remove it in
> case there was some kind of double termination, but that didn't seem to
> resolve it. The terminator is good because the machine works with other
> disks.
> From: Chris Zach
> a M857 board with a RS232 cable on it and BC01R-25 on it.
Anyone know what an M857 is? I guess it might be a DF11 async answer mode? I
found this:
https://www.computerhistory.org/collections/catalog/102731577
but I think the number there is wrong; I'm not sure
The original serial interface in the PDP-11 (later 11/20) was four cards
in a specially-wired backplane slot. There was an M782(1?) interrupt
controller, a data path module whose number I forget, and the interface.
That card brought out the cable to the outside world. IOW they were
combining
Hm. Ok, so what was it for then? Any specific pdp11, or just the serial
plug for a weird Unibus sync modem cardset?
I'm thinking of cutting it down and using it as a 20ma current loop plug
for one of my pdp8/L's. If anyone wants to trade it for a real DEC 8/I
or 8/L card or if this thing has
Hmm... There was already a terminator installed. I tried to remove it in
case there was some kind of double termination, but that didn't seem to
resolve it. The terminator is good because the machine works with other
disks.
Regards
Rob
> -Original Message-
> From: Rob Jarratt
> Sent:
I have other DSSI machines to try them in, just a bit less easy to install
them in those machines. Going to check the termination now.
> -Original Message-
> From: dave.g4...@gmail.com
> Sent: 02 January 2022 15:19
> To: r...@jarratt.me.uk; 'General Discussion: On-Topic and Off-Topic
Rob,
If that is not the issue, do you need to try them in the MicroVax 4000 here?
Dave
(p.s. can SCSI terminators fit in a DSSI bus socket by mistake)
> -Original Message-
> From: Rob Jarratt
> Sent: 02 January 2022 14:05
> To: dave.g4...@gmail.com; r...@jarratt.me.uk; 'General
I thought I had checked, but I can double check just to be sure. Thanks for
the suggestion, it certainly feels like it could be something like this.
> -Original Message-
> From: dave.g4...@gmail.com
> Sent: 02 January 2022 13:01
> To: r...@jarratt.me.uk; 'Rob Jarratt' ;
'General
>
Rob,
I know this is probably a stupid suggestion, but are they terminated
correctly?
Dave
> -Original Message-
> From: cctalk On Behalf Of Rob Jarratt via
> cctalk
> Sent: 02 January 2022 07:30
> To: 'General Discussion: On-Topic and Off-Topic Posts'
>
> Subject: RE: DEC RF30
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