>
> TU58 's is ready to test. I tried it in a spare serial port on a VS 3100.
> Result nothing. I suspect the port is 423 and the tu58 232.
Actually the TU58 serial port has the differential driver and receivers used
on the later serial ports. It should talk to DECs version of RS423 with no
> -Original Message-
> From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Jon Elson
> Sent: 05 December 2015 18:03
> To: gene...@classiccmp.org; discuss...@classiccmp.org:On-Topic and Off-
> Topic Posts
> Subject: Re: Memory Voltage on MicroVAX II
>
> On 12/05/2015 09:51
On 12/05/2015 09:51 AM, Robert Jarratt wrote:
I finally fixed my H7864 PSU so I can now run my rtVAX 1000. However, I
think the machine is damaging memory boards. I checked the ripple and 5V
looks OK, but 12V looks suspicious. Is the 12V supply used by the memory?
I don't have my print set
On 12/05/2015 12:29 PM, Robert Jarratt wrote:
-Original Message-
From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Jon Elson
Sent: 05 December 2015 18:03
To: gene...@classiccmp.org; discuss...@classiccmp.org:On-Topic and Off-
Topic Posts
Subject: Re: Memory Voltage on
I finally fixed my H7864 PSU so I can now run my rtVAX 1000. However, I
think the machine is damaging memory boards. I checked the ripple and 5V
looks OK, but 12V looks suspicious. Is the 12V supply used by the memory?
Incidentally, as I have mentioned before, I have drawn out the schematics
On 2015-12-05 13:29, tony duell wrote:
TU58 's is ready to test. I tried it in a spare serial port on a VS 3100.
Result nothing. I suspect the port is 423 and the tu58 232.
Actually the TU58 serial port has the differential driver and receivers used
on the later serial ports. It should talk
And we have a runner.. it was set for 19.2k
A quick change of config.sys and off we go.
I have only one cartridge so no tape to tape
Pc to tape works. So now to find one of my systems with a spare serial port
R
On 05/12/15 16:15, Johnny Billquist wrote:
On 2015-12-05 13:29, tony duell wrote:
>
>
> There seems to be a spike on the 12V supply, surely that isn't good, even if
> it doesn't affect the memory?
Often a spike on a particular output of an SMPSU is caused by a high ESR
capacitor
on that output. It's worth checking them.
FWIW, old DRAMs, up to about 16Kbit size, often used
> >
> >> TU58 's is ready to test. I tried it in a spare serial port on a VS 3100.
> >> Result nothing. I suspect the port is 423 and the tu58 232.
> >
> > Actually the TU58 serial port has the differential driver and receivers used
> > on the later serial ports. It should talk to DECs version of
Hi,
has anyone ever heard of Evotek ET-5800 series Winchester
harddisks? I wonder which interface they have. I'm looking
for a replacement of a CDC FINCH 9410 and wonder if they
would be a possible replacement.
ET-5800:
http://www.ebay.de/itm/252174622907
CDC-FINCH:
On 12/05/2015 10:36 AM, Oliver Lehmann wrote:
Hi,
has anyone ever heard of Evotek ET-5800 series Winchester harddisks?
I wonder which interface they have. I'm looking for a replacement of
a CDC FINCH 9410 and wonder if they would be a possible replacement.
ET-5800:
Hi
At the moment I have it connected to an old laptop running msdos
and gizmos driver for same.
Its showing signs of life at 38400. I have BOB in circuit and can see
the commands going to it.
Some times it responds and sometimes it does not.
Rod
On 05/12/15 12:29, tony duell wrote:
>
> The Evotek 5000 series is a bog-standard ST-506/ST-412 "MFM" interface.
> OEM manual is on Manx:
>
> http://manx.classiccmp.org/mirror/harte/Evotek/ET-5000%20Family%20OEM%20Manual.pdf
>
> Back in 1983 I had an opportunity to play with one. Pretty interesting,
> but very expensive, as I
> -Original Message-
> From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Jon Elson
> Sent: 05 December 2015 19:19
> To: gene...@classiccmp.org; discuss...@classiccmp.org:On-Topic and Off-
> Topic Posts
> Subject: Re: Memory Voltage on MicroVAX II
>
> On 12/05/2015 12:29
On 12/05/2015 01:49 PM, Robert Jarratt wrote:
As the 5V seems fine, the ripple seemed to be about 20mV
(although I am going to check again), I do wonder what
could be causing the memory modules to appear to be
failing. I am hoping that re-seating will cure it. Regards
Rob
I ran a uVAX-II for
> -Original Message-
> From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Jon Elson
> Sent: 05 December 2015 23:40
> To: gene...@classiccmp.org; discuss...@classiccmp.org:On-Topic and Off-
> Topic Posts
> Subject: Re: Memory Voltage on MicroVAX II
>
> On 12/05/2015 01:49
I need to bring up a 11/20 shall I use a variac!?
added core where can I find if I decide to add to it?
ed sharpe _www.smecc.org_ (http://www.smecc.org)
I need to bring up a 11/20 shall I use a variac!?
added core where can I find if I decide to add to it?
ed sharpe _www.smecc.org_ (http://www.smecc.org/)
(resent with address corrections)
On 12/05/2015 11:19 AM, tony duell wrote:
I've skimmed that manual and wonder why they are 'pretty interesting'. What
have I missed?
For the time (1982), they were larger than almost any other
ST506-interfaced 5.25' drives.
--Chuck
> -Original Message-
> From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Robert
> Jarratt
> Sent: 05 December 2015 19:49
> To: 'General Discussion: On-Topic and Off-Topic Posts';
> gene...@classiccmp.org
> Subject: RE: Memory Voltage on MicroVAX II
>
>
> > -Original
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