Re: Burnable, patched Microvax-2000 SCSI-boot EPROM images?

[Jonathan Chapman via cctalk]

> One of my Fall projects is to figure out why my Data I/O 29A isn't
> working. It's been sitting for years and when I got it out last year,
> it didn't pass self-test. I need to spend some time looking over the
> posts in that group to see if my symptoms are common.

The diagnostics are pretty good, and the service manual for the base + pack of 
choice will get you through it! Let me know if you can't get it going.

> That said, unless you need to program stuff other than 2716-27512 and
> up in that line, an old Data I/O is probably not what you need. If
> you need to program chips made before 1985, then it might be a good
> choice.

Agreed, not necessary to go with a Data I/O if you don't need to program old or 
weird stuff. And certainly not at the price of that eBay one, with the limited 
pack it has, and no front panel/display.

Thanks,
Jonathan

Re: Toad1 XKL version of TOPS20 v7

[Rich Alderson via cctalk]

> Date: Tue, 21 Sep 2021 15:26:43 -0400
> From: Bob Smith via cctalk 

> I have noted that the Computer History Museum has a number of donations from
> XKL re Toad1.

Look again.  That system, the documentation, and the backup tapes, were donated
by HEWLETT-PACKARD CORPORATION, not by XKL.  Tim Litt was responsible for this
donation, probably to keep ev erything from simply being binned by the HP folks.

> Rich Alderson might be the resident expert for this set of questions.

Quite likely. ;->

> two questions are thus prompted, and a third teased.
> 1. Does that XKL version run on the KLH10 emulator?

Absolutely not.

KLH10 emulates a KL-10 processor with Massbus peripherals, which is what Ken
Harrenstien was interested in doing.  Neither he, nor the late Mark Crispin
after he took over maintenance on KLH10, had access to Toad-1 internals.

Major differences between the two processors:

1.  The XKL-1 CPU (and all follow-on processors) implement the full 30-bit
extended addressing defined for release 4 of TOPS-20 by DEC.  The KL-10
implements a 23-bit subset.
2.  In conjunction with this, the XMG-1 memory card provides 32MW of
memory, contrasted with the physical maximum of 4MW in the KL-10.
3.  The XRH-1 I/O processor implements 4 FASTWIDE SCSI-2 channels (top of
the line in 1995 when the system was introduced), rather than Massbus.
4.  The XNI-1 Ethernet board implements 4 10baseT interfaces compatible
with the Stanford MEIS rather than the DEC NIA-20.
5.  The backplane of the Toad-1 system implements a completely different
model of inter-card interactions than the KL-10, so that so-called "I/O
instructions" are completely different from those of the KL-10.  They
resemble, but are unrelated in detail to, the I/O instructions on the
KS-10 processor in the DECSYSTEM-2020.

With all these differences, there is no way for KLH10 to even begin to execute
the XKL version of the TOPS-20 monitor.

> 2. Is the tape CHM has been archived anywhere it might be available
> for download?

That's a question for Al Kossow, rather than for me, since I was never
associated with CHM other than as an admirer.

> and the teaser
> 3. Has anyone created an SSH Server for TOPS20?

Not to my knowledge, although it has been attempted several times.

Although it has not been fully set up yet, AFAIK, the folks at SDF.org have
just acquired an XKL DarkStar box in the TOPS-20 engine configuration, and will
be moving from a KLH-10 emulation to actual PDP-10 hardware in the very near
future.  This is a TOAD-2, like those run by LCM+L for the last few years of
its operation.

Rich

Re: R.I.P. Clive Sinclair

[jim stephens via cctalk]

I have a version of a full size 8" floppy drive footprint (or hard 
drive) which is wafer scale storage.

thanks
Jim

On 9/21/2021 3:00 PM, Jecel Assumpcao Jr via cctalk wrote:

An interesting project that Sir Clive was involved in was the wafer
scale integration effort by Ivor Catt.

http://www.computinghistory.org.uk/det/8199/Anamartic-Limited/

The goal was to eventually do what the Cerebras people are now doing
(with lots of positive press), but their first products attempted to
replace hard disks with battery-backed wafer scale SRAMs. The many-core
processors would come later, but as HD densities took off (after only
having grown slowly from the mid 1970s to mid 1980s) the investors
pulled out.

-- Jecel

Re: R.I.P. Clive Sinclair

[Jecel Assumpcao Jr via cctalk]

Fred Cisin wrote on Sat, 18 Sep 2021 13:45:04 -0700 (PDT)
> On Sat, 18 Sep 2021, dwight via cctalk wrote:
> > Of course, Busicom was the first programed microprocessor driven 
> > calculator, it wasn't the first calculator using calculator ICs. That is 
> > what Busicom was trying to compete with, when going to Intel in the 
> > first place.
> 
> I think that the Sinclair used TI calculator ICs.
> Unless he had a special "in" with TI, AND was fastest to market, then it 
> is doubtful that he could legitimately claim to be "FIRST".

The TI people were selling their chip as a simple four operation
calculator. Here is what the Sinclair people did with it:

http://files.righto.com/calculator/sinclair_scientific_simulator.html

An interesting project that Sir Clive was involved in was the wafer
scale integration effort by Ivor Catt.

http://www.computinghistory.org.uk/det/8199/Anamartic-Limited/

The goal was to eventually do what the Cerebras people are now doing
(with lots of positive press), but their first products attempted to
replace hard disks with battery-backed wafer scale SRAMs. The many-core
processors would come later, but as HD densities took off (after only
having grown slowly from the mid 1970s to mid 1980s) the investors
pulled out.

-- Jecel

Re: Burnable, patched Microvax-2000 SCSI-boot EPROM images?

[Ethan Dicks via cctalk]

On Tue, Sep 21, 2021 at 4:37 PM Jonathan Chapman via cctalk
 wrote:
> > The DEC-badged Data-IO " on eBay is tempting, but expensive, and I don't 
> > know where to find software.
>
> If it is just a regular Data I/O underneath, head over to the groups.io page:
>
> https://groups.io/g/DataioEPROM/

One of my Fall projects is to figure out why my Data I/O 29A isn't
working.  It's been sitting for years and when I got it out last year,
it didn't pass self-test.  I need to spend some time looking over the
posts in that group to see if my symptoms are common.

That said, unless you need to program stuff other than 2716-27512 and
up in that line, an old Data I/O is probably not what you need.  If
you need to program chips made before 1985, then it might be a good
choice.

-ethan

Re: PDP-11/73 boot issues

[Aaron Jackson via cctalk]

Pete Turnbull via cctalk writes:

> On 21/09/2021 20:34, Chris Zach via cctalk wrote:
>> Can an MXV11 be used in a 22 bit system? I thought it was an 18 bit
>> device?
>
> MXV11-B is 22-bit.  MXV11-A is 18-bit but supposedly can be used in a 
> 22-bit system if the RAM is disabled.

Yeah this is a 22 bit card. Josh sent me an xxdp image which I could
easily boot from my scsi2sd (thanks!).  Seems to be reporting an error
with the CPU unfortunately:

]] .R ZKDJ??
]] ZKDJB2.BIC
]] 
]] ERROR WHILE TESTING BOARD FUNCTIONS
]] ERROR # =001166
]] ERROR PC =040662
]] 043632

This happens regardless of whether W9 is installed or not (supposedly
disables the LTC register on the CPU?)

I'll see if I can borrow another CPU card form a friend this
weekend. Unless anyone else has any ideas?  Another suggestion on IRC
was to disable the PSU LTC and enable the LTC on MXV11 but will need to
look up some details on how to do this.

Thanks,
Aaron

Re: PDP-11/73 boot issues

[Pete Turnbull via cctalk]

On 21/09/2021 20:34, Chris Zach via cctalk wrote:

Can an MXV11 be used in a 22 bit system? I thought it was an 18 bit
device?


MXV11-B is 22-bit.  MXV11-A is 18-bit but supposedly can be used in a 
22-bit system if the RAM is disabled.


--
Pete
Pete Turnbull

Re: Burnable, patched Microvax-2000 SCSI-boot EPROM images?

[Jonathan Stone via cctalk]

 

On Tuesday, September 21, 2021, 01:37:28 PM PDT, Jonathan Chapman 
 wrote:


>> The DEC-badged Data-IO " on eBay is tempting, but expensive, and I don't 
>> know where to find software.


>If it is just a regular Data I/O underneath, head over to the groups.io page:
>
>https://groups.io/g/DataioEPROM/

The eBay listing is https://www.ebay.com/itm/303208951366. Nostalgic though it 
is, I'd prefer to put the price difference into vintage computers, rather than 
vintage PROM programmers.
  

Re: Burnable, patched Microvax-2000 SCSI-boot EPROM images?

[Jonathan Chapman via cctalk]

> The DEC-badged Data-IO " on eBay is tempting, but expensive, and I don't know 
> where to find software.

If it is just a regular Data I/O underneath, head over to the groups.io page:

https://groups.io/g/DataioEPROM/

Thanks,
Jonathan

Re: Burnable, patched Microvax-2000 SCSI-boot EPROM images?

[Jonathan Stone via cctalk]

 

On Tuesday, September 21, 2021, 05:39:23 AM PDT, Holm Tiffe via cctalk 
 wrote:

>I've tried this almost 2 years before..and it worked "somewhat".
>An VS2000 booted up in the first stage but the NetBSD Kernel couldn't
>mount root since nothing in the loader expected a disk at the NCR SCSI
>interface on the VS2000. Ragge agreed to look at this (bootcode) on my
>VS2000, but I'vwe couldn't get an ssh connection from the internet to
>an VS3100 M76 to which the VS2000 console was connected to..to work..

I once "owned" the NetBSD MIPS port, and I've done VAX assembly and kernel code 
j(e.g., VMS device drivers). If I can't figure it out by comparison to 3100 
code, I'll contact Ragge and set up remote access via a BCC08, a NetBSD laptop, 
and serial. (At least one of the VS200s is jumpered to Vaxstation mode, and I 
have two GPX daughter-cards on order.)

>For yure I could burn the proms, but I think I'm on the other side of
>the pond..

I am located in the San Francisco Bay Area. I came here for grad school and 
never left.

 It may be time for me to buy a PROM programmer. Anyone got recommendations for 
a budget device? "Amazon's choice" is https://www.amazon.com/dp/B082D5NQ2P. The 
costlier option includes 10 different sockets, and it claims support for 29xxx 
and 29Cxxx EPROMs, plus lots of others.

The DEC-badged Data-IO " on eBay is tempting, but expensive, and I don't know 
where to find software.  

Re: PDP-11/73 boot issues

[Chris Zach via cctalk]

Can an MXV11 be used in a 22 bit system? I thought it was an 18 bit device?

That could cause all sorts of hilarity.

C

On 9/21/2021 3:21 PM, Aaron Jackson via cctalk wrote:

This is an interesting amount of physical memory to report (1152K).  What
memory board(s) do you have installed?

Other than that, this output looks sane to me.  I'd suggest booting XXDP
and running CPU, memory diagnostics from there.

- Josh

Thanks, I forgot about XXDP. I have ran a memory test from the boot ROM
which came back ok.

The unusual amount of RAM comes from two MSV11-PL 512K cards, plus the
128K from MXV11-BF.

Thanks,
Aaron

Re: Toad1 XKL version of TOPS20 v7

[Al Kossow via cctalk]

On 9/21/21 12:31 PM, Al Kossow via cctalk wrote:

On 9/21/21 12:26 PM, Bob Smith via cctalk wrote:

I have noted that the Computer History Museum has a number of
donations from XKL re Toad1.
Rich Alderson might be the resident expert for this set of questions.


Why would you think that?

CHM != LCM+L


anyway, I haven't read them. I didn't even know we had them
https://www.computerhistory.org/collections/catalog/102773832

I'll put it on the to-do list. Things have been slow since I
have limited access to my lab.

Re: Toad1 XKL version of TOPS20 v7

[Al Kossow via cctalk]

On 9/21/21 12:26 PM, Bob Smith via cctalk wrote:

I have noted that the Computer History Museum has a number of
donations from XKL re Toad1.
Rich Alderson might be the resident expert for this set of questions.


Why would you think that?

CHM != LCM+L

Toad1 XKL version of TOPS20 v7

[Bob Smith via cctalk]

I have noted that the Computer History Museum has a number of
donations from XKL re Toad1.
Rich Alderson might be the resident expert for this set of questions.

two questions are thus prompted, and a third teased.
1. Does that XKL version run on the KLH10 emulator?
2. Is the tape CHM has been archived anywhere it might be available
for download?

and the teaser
3. Has anyone created an SSH Server for TOPS20?
thanks
bob smith

Re: PDP-11/73 boot issues

[Aaron Jackson via cctalk]

>
> This is an interesting amount of physical memory to report (1152K).  What
> memory board(s) do you have installed?
>
> Other than that, this output looks sane to me.  I'd suggest booting XXDP
> and running CPU, memory diagnostics from there.
>
> - Josh

Thanks, I forgot about XXDP. I have ran a memory test from the boot ROM
which came back ok.

The unusual amount of RAM comes from two MSV11-PL 512K cards, plus the
128K from MXV11-BF.

Thanks,
Aaron

Re: PDP-11/73 boot issues

[Josh Dersch via cctalk]

On Tue, Sep 21, 2021 at 12:05 PM Aaron Jackson via cctalk <
cctalk@classiccmp.org> wrote:

> Hi all,
>
> My PDP-11/73 has started misbehaving after several years of being very
> stable. It is showing symptoms similar to when I've forgotten to enable
> the LTC in the past, except this time, it is enable.
>
> Power supply seems good - +5V, +12V, all seems there and appears to be
> stable. I've probed the LTC going onto the backplane and I'm getting
> 50Hz. It looks a tad noisy, not sure if this is a problem. I will see if
> I can get a picture of it, but it has very distinct rises and falls, so
> hopefully that's ok. Looks to be about 50% duty cycle.
>
> I've attempted several builds of the kernel, including the
> out-of-the-box build from 2.11BSD distribution. I've also compiled a
> shrunk down kernel without a bunch of devices I don't have, but it still
> fails to work. I am using a SCSI2SD so it's easy for me to copy images
> and test them in SIMH - they all boot fine in SIMH with a similar setup
> (mscp, tmscp, 11/73, 1MB-ish RAM).
>
> Does anyone have any ideas what might be causing this? I've run out of
> ideas unfortunately. I'll stick a dump of the boot below, with debug
> flag passed showing output from autoconfig.
>
> I've also tried it without the tmscp card - just CPU, RAM and Emulex
> UC07 in MSCP mode for scsi disk. I have tried it with less memory, and
> I've tried removing the halt jumper from the 11/73 board (W5 if I
> remember correctly)
>
> Cheers,
> Aaron
>
> -
> ^C
> BOOT>  DU 0
>
> 73Boot from ra(0,0,0) at 0172150
> : ra(0,0,0)unix -D
> Boot: bootdev=02400 bootcsr=0172150
>
> 2.11 BSD UNIX #116: Wed Dec 31 18:01:57 CST 1969
> r...@localhost.2bsd.com:/usr/src/sys/GENERIC
>
> ra0: Ver 5 mod 13
> ra0: RA81  size=1216601
>
> phys mem  = 1179648
>

This is an interesting amount of physical memory to report (1152K).  What
memory board(s) do you have installed?

Other than that, this output looks sane to me.  I'd suggest booting XXDP
and running CPU, memory diagnostics from there.

- Josh

PDP-11/73 boot issues

[Aaron Jackson via cctalk]

Hi all,

My PDP-11/73 has started misbehaving after several years of being very
stable. It is showing symptoms similar to when I've forgotten to enable
the LTC in the past, except this time, it is enable.

Power supply seems good - +5V, +12V, all seems there and appears to be
stable. I've probed the LTC going onto the backplane and I'm getting
50Hz. It looks a tad noisy, not sure if this is a problem. I will see if
I can get a picture of it, but it has very distinct rises and falls, so
hopefully that's ok. Looks to be about 50% duty cycle.

I've attempted several builds of the kernel, including the
out-of-the-box build from 2.11BSD distribution. I've also compiled a
shrunk down kernel without a bunch of devices I don't have, but it still
fails to work. I am using a SCSI2SD so it's easy for me to copy images
and test them in SIMH - they all boot fine in SIMH with a similar setup
(mscp, tmscp, 11/73, 1MB-ish RAM).

Does anyone have any ideas what might be causing this? I've run out of
ideas unfortunately. I'll stick a dump of the boot below, with debug
flag passed showing output from autoconfig.

I've also tried it without the tmscp card - just CPU, RAM and Emulex
UC07 in MSCP mode for scsi disk. I have tried it with less memory, and
I've tried removing the halt jumper from the 11/73 board (W5 if I
remember correctly)

Cheers,
Aaron

-
^C
BOOT>  DU 0

73Boot from ra(0,0,0) at 0172150
: ra(0,0,0)unix -D
Boot: bootdev=02400 bootcsr=0172150

2.11 BSD UNIX #116: Wed Dec 31 18:01:57 CST 1969 
r...@localhost.2bsd.com:/usr/src/sys/GENERIC

ra0: Ver 5 mod 13
ra0: RA81  size=1216601

phys mem  = 1179648
avail mem = 959040
user mem  = 307200


_hkprobe = 0
_hkattach = 143330
_hkVec = 0
hkintr = 120
_htprobe = 0
_htattach = 143550
_htVec = 0
htintr = 150
_raprobe = 0
_raattach = 34270
_raVec = 34200
raintr = 100
_rkprobe = 0
_rkattach = 144650
_rkVec = 0
rkintr = 130
_rlprobe = 0
_rlattach = 144770
_rlVec = 0
rlintr = 110
_tmprobe = 0
_tmattach = 143610
_tmVec = 0
tmintr = 160
_tmsprobe = 0
_tmsattach = 143740
_tmsVec = 143730
tmsintr = 200
_tsprobe = 0
_tsattach = 143660
_tsVec = 0
tsintr = 170
_xpprobe = 0
_xpattach = 0
_xpVec = 0
xpintr = 0
endvec = 1000
_conf_int = 16124
CGOOD = 14
CBAD = 24
_nextiv = 5500
trap = 4150
_version = 17400
KERN_NONSEP = 0
Grab 177440 = 36556hk ? csr 177440 vector 210 skipped:  No CSR.
Grab 172440 = 36556ht ? csr 172440 vector 224 skipped:  No CSR.
Grab 172150 = 0Grab 156 = 240Grab 154 = 100Stuff 14 @ 154
Stuff 340 @ 156
probe ra: return conf_int:Stuff 100 @ 154
Stuff 240 @ 156
ra ? csr 172150 vector 154 bad probe value 224.
Grab 177400 = 36556rk ? csr 177400 vector 220 skipped:  No CSR.
Grab 174400 = 36556rl ? csr 174400 vector 160 skipped:  No CSR.
Grab 172520 = 36556tm ? csr 172520 vector 224 skipped:  No CSR.
Grab 174500 = 0Grab 262 = 0Grab 260 = 0tms ? csr 174500 vector 260 interrupt 
vector already in use.
Grab 172520 = 36556ts ? csr 172520 vector 224 skipped:  No CSR.
xp ? csr 176700 vector 254 skipped:  No autoconfig routines.


At this point it is stuck no matter how long I wait.

Re: VAXstation 100 ROM image

[Ethan Dicks via cctalk]

On Tue, Sep 21, 2021 at 2:04 PM Josh Dersch via cctalk
 wrote:
> (DEC did make a Unibus to Qbus adapter, the DW11-B, but it was unrelated to
> the VS100)

Yes.  I have one.  It came in a PDP-11/34 so they could install an
IBV11 on a Unibus machine for a Physics Department.

Much older than the VS100.

-ethan

Re: Burnable, patched Microvax-2000 SCSI-boot EPROM images?

[Jonathan Stone via cctalk]

 

On Tuesday, September 21, 2021, 11:02:38 AM PDT, Antonio Carlini via cctalk 
 wrote:

> My recollection is that the MicroVAX 2000 SCSI isn't complete and was
> only intended for the tape unit. Whether its performance beats an RD54
> will be interesting to see.

The ROM/VMB support certainly isn't "complete". The NCR5380 itself can do SCSI 
for both disks and tapes. 
My comparison point would probably be MFM emulator versus SCSI2SD v5.2. 
Documentation, 
http://bitsavers.trailing-edge.com/components/ncr_symbios/scsi/NCR_SCSI_Engineering_Notebook_Rev2_Oct85.pdf
 , says the NCR538x didn't support synchronous SCSI until the 5386S. The SCSI 
devices would have to avoid ID 0, as that's what the MV2000 ROM uses.  

Re: VAXstation 100 ROM image

[Jonathan Stone via cctalk]

 

On Tuesday, September 21, 2021, 11:04:22 AM PDT, Josh Dersch 
 wrote:

[...]
>No, there's no QBus involved here.  The M7452 "UNIBUS Window Module" connects 
>the VS100 to the VAX via a fiber-optic link.

thanks for the correction. I wonder what I was mis-remembering. maybe a 
QBus-to-Unibus?

   

Re: VAXstation 100 ROM image

[Josh Dersch via cctalk]

On Tue, Sep 21, 2021 at 10:43 AM Jonathan Stone via cctalk <
cctalk@classiccmp.org> wrote:

>
>
> On Tuesday, September 21, 2021, 10:17:33 AM PDT, Chris Zach via cctech <
> cct...@classiccmp.org> wrote:
>
>
> > How the hell did I miss *that*? Cool beans device, I've never heard of a
> > VS100. Was it in a Rainbow sized box or a Pro/350 box?
>
> If old memories serve, you'd also need the Unibus-to-Qbus converter. I
> recall a discussion between someone from, I think DEC UK Reading, asking
> about a DEC Unibus-to-Qbus converteer. The other person said DEC didn't
> have such a device. then Vaxstation-100 was mentinoed. I expect you could
> get it to work as a Qbus device with 18-bit addresssing.
>

No, there's no QBus involved here.  The M7452 "UNIBUS Window Module"
connects the VS100 to the VAX via a fiber-optic link.

(DEC did make a Unibus to Qbus adapter, the DW11-B, but it was unrelated to
the VS100)

- Josh

Re: Burnable, patched Microvax-2000 SCSI-boot EPROM images?

[Antonio Carlini via cctalk]

On 21/09/2021 18:38, Jonathan Stone via cctalk wrote:
  
  (At least for Qbus. At eBay prices, even RQDX3 plus distribution panel plus emulator, is cheaper than bootable SCSI controller plus SCSI emulator). SCSI performance will still be better.
   


My recollection is that the MicroVAX 2000 SCSI isn't complete and was 
only intended for the tape unit. Whether its performance beats an RD54 
will be interesting to see.



Antonio


--
Antonio Carlini
anto...@acarlini.com

First SCSI HDD - Priam 806 8-inch?

[Tom Gardner via cctalk]

It turns out the Priam 806 8-inch SCSI HDD circa 1984 is likely the first
HDD to have a native SCSI interface.  It shipped a few months before the
Xebec Owl which is likely second.  AFAIK all earlier units had a bridge
controller to a more conventional interface.  

If anyone has any different info as to dates and models I would appreciate
it.

Does anyone know where a Priam 806 might be, or have any documentation?  The
former probably belongs in a museum and the latter on Bitsavers.  I will
help facilitate either.

Tom
t.gard...@computer.org

Re: VAXstation 100 ROM image

[Jonathan Stone via cctalk]

 

On Tuesday, September 21, 2021, 10:17:33 AM PDT, Chris Zach via cctech 
 wrote:


> How the hell did I miss *that*? Cool beans device, I've never heard of a
> VS100. Was it in a Rainbow sized box or a Pro/350 box?

If old memories serve, you'd also need the Unibus-to-Qbus converter. I recall a 
discussion between someone from, I think DEC UK Reading, asking about a DEC 
Unibus-to-Qbus converteer. The other person said DEC didn't have such a device. 
then Vaxstation-100 was mentinoed. I expect you could get it to work as a Qbus 
device with 18-bit addresssing.
  

Re: Burnable, patched Microvax-2000 SCSI-boot EPROM images?

[Jonathan Stone via cctalk]

 
On Tuesday, September 21, 2021, 09:15:20 AM PDT, Paul Koning via cctalk 
 wrote:
>> On Sep 21, 2021, at 12:00 PM, Jonathan Stone via cctalk 
>>  wrote:
>>
>> The RD53s in both Microvax 2000s are dead. I'm reluctant to buy more 30+ 
>> year old rotating media.
>> If I'm going to buy a disk emulator, I'd much prefer SCSI to MFM, for the 
>> obvious performance reasons.
>
>
>Emulators presumably act, performance wise, like SSDs.  Given that, an MFM 
>emulator will significantly outperform a SCSI hard >drive since it has no seek 
>delays.
>
>David Gesswein's MFM emulator works impressively well and is inexpensive, too.

My comparison was MFM emulators versus SCSI emulators. scs2sd is significantly 
cheaper than David Gesswein's MFM emulator; and higher performance. (IIRC, 
Gesswein's emulator transfers entire track images between SSD and RAM, but I 
may be remembering DREM documentation instead.).

OTOH, for a machine which already has an MFM controller but no SCSI, an MFM 
emulator is cheaper than scs2sd plus SCSI controller. (At least for Qbus. At 
eBay prices, even RQDX3 plus distribution panel plus emulator, is cheaper than 
bootable SCSI controller plus SCSI emulator). SCSI performance will still be 
better.

  

Re: Data General Terminal Question

[Liam Proven via cctalk]

On Tue, 21 Sept 2021 at 19:06, Mike Nealey via cctalk
 wrote:
>
> Hi!
>
> Sorry for the slow reply. I have attached some pictures of the terminal. 
> Thanks for your help!!

It looks like you may be new to mailing lists.

You should bottom-post -- i.e. your reply goes _underneath_ the
trimmed text to which you're responding -- and you can't send
attachments. Better put them on an image-hosting site somewhere and
attach a link.

-- 
Liam Proven – Profile: https://about.me/liamproven
Email: lpro...@cix.co.uk – gMail/gTalk/gHangouts: lpro...@gmail.com
Twitter/Facebook/LinkedIn/Flickr: lproven – Skype: liamproven
UK: +44 7939-087884 – ČR (+ WhatsApp/Telegram/Signal): +420 702 829 053

Re: VAXstation 100 ROM image

[Al Kossow via cctalk]

On 9/21/21 9:58 AM, Chris Zach via cctalk wrote:

How the hell did I miss *that*? Cool beans device, I've never heard of a VS100. 
Was it in a Rainbow sized box or a Pro/350 box?


Smaller. I have access to one to take pictures and dump the firmware

Re: VAXstation 100 ROM image

[Zane Healy via cctalk]

On Sep 21, 2021, at 10:10 AM, Josh Dersch  wrote:
> 
> On Tue, Sep 21, 2021 at 10:04 AM Zane Healy via cctalk  > wrote:
> I’m rather wondering how I missed that Auction.  That’s the first time I’ve 
> ever seen any photos of a VS100.  I believe it required a UNIBUS card to 
> connect it to the VAX.
> 
> Yes, with a fiber optic link; here's a picture of the board (M7452) and 
> cabling:
> 
> https://1drv.ms/u/s!Aqb36sqnCIfMo_cMPAR0aeAPKAYXJg 
> 
> 
> And here's a pic of my VS100 running (connected to an 11/750 running 4.3BSD):
> 
> https://1drv.ms/u/s!Aqb36sqnCIfMo_cUO4EiMWOHZVk8yg 
> 
> 
> (Still trying to hunt down a VR100 monitor, in case anyone has one...)
> 
> - Josh

I’m officially seriously impressed, I had no idea anyone had one working!

Any chance you can dump ROM’s for Lars?

Zane

Re: VAXstation 100 ROM image

[Josh Dersch via cctalk]

On Tue, Sep 21, 2021 at 10:04 AM Zane Healy via cctalk <
cctalk@classiccmp.org> wrote:

> I’m rather wondering how I missed that Auction.  That’s the first time
> I’ve ever seen any photos of a VS100.  I believe it required a UNIBUS card
> to connect it to the VAX.
>

Yes, with a fiber optic link; here's a picture of the board (M7452) and
cabling:

https://1drv.ms/u/s!Aqb36sqnCIfMo_cMPAR0aeAPKAYXJg

And here's a pic of my VS100 running (connected to an 11/750 running
4.3BSD):

https://1drv.ms/u/s!Aqb36sqnCIfMo_cUO4EiMWOHZVk8yg

(Still trying to hunt down a VR100 monitor, in case anyone has one...)

- Josh



>
> Zane
>
>
> > On Sep 21, 2021, at 9:58 AM, Chris Zach via cctalk <
> cctalk@classiccmp.org> wrote:
> >
> > How the hell did I miss *that*? Cool beans device, I've never heard of a
> VS100. Was it in a Rainbow sized box or a Pro/350 box?
> >
> >
> > C
> >
> > On 9/21/2021 12:35 PM, Glen Slick via cctalk wrote:
> >> On Tue, Sep 21, 2021 at 9:10 AM Lars Brinkhoff via cctalk
> >>  wrote:
> >>> Hello,
> >>>
> >>> Does anyone have a (set of) ROM image(s) for the VAXstation 100?
> >>> It might be interesting to attempt an emulator.
> >> Did someone on the list buy this one? That was the only one that I
> >> have noticed for sale on eBay anytime recently.
> >>
> >> https://www.ebay.com/itm/294252478149
> >> Rare Dec Vaxstation 100 Prototype Digital VAX
> >> Ended: Jul 07, 2021
> >> Winning bid: US $256.00
>
>

Re: Burnable, patched Microvax-2000 SCSI-boot EPROM images?

[Glen Slick via cctalk]

On Tue, Sep 21, 2021 at 9:00 AM Jonathan Stone via cctalk
 wrote:
>
>  One of the reasons I got the 2000s is to format MFM drives for an RQDX3 (I 
> don't have any PDP-11 CPUs). I have a CMD CQD-420 Qbus SCSi controller, and 
> an MTI almost-equivalent. I've seen Glen Slick's reverse engineering of the 
> PLD for the CDQ-200. I hope the newer MTI board "just works"; but if not, MFM 
> is a fallback.

The MTI QTS-30 board I have is essentially the same thing as a CMD
CQD-200 board, just with different firmware. It can be converted into
a CQD-200/TM functional equivalent by swapping the firmware EPROMs and
CSR decode PAL.

I haven't seen an MTI version of the CMD CQD-420 board. The CQD-420 is
more similar to the CQD-220A than the CQD-220, with the standard CSR
address decoding being done in the QBC0420 ASIC instead of in the PAL.
The CQD-220A / CQD-420 PALs only decode the "special" disk/tape CSR
address when that is selected via the address selection DIP switches.

Classic sale/give-away Jefferson, WI USA

[Eric Pruitt via cctalk]

Re: cctech Digest, Vol 84, Issue 14

[John Ames via cctalk]

Per https://www.tuhs.org/cgi-bin/utree.pl?file=2.9BSD/usr/doc/2.9_kernel.ms
2.9BSD had a driver for it.

On 9/20/21, cctech-requ...@classiccmp.org  wrote:
> Send cctech mailing list submissions to
>   cct...@classiccmp.org
>
> To subscribe or unsubscribe via the World Wide Web, visit
>   http://www.classiccmp.org/mailman/listinfo/cctech
> or, via email, send a message with subject or body 'help' to
>   cctech-requ...@classiccmp.org
>
> You can reach the person managing the list at
>   cctech-ow...@classiccmp.org
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of cctech digest..."
>
>
> Today's Topics:
>
>1. DEC ML11 (Mark Kahrs)
>
>
> --
>
> Message: 1
> Date: Mon, 20 Sep 2021 10:47:46 -0400
> From: Mark Kahrs 
> To: "General Discussion: On-Topic Posts Only" 
> Subject: DEC ML11
> Message-ID:
>   
> Content-Type: text/plain; charset="UTF-8"
>
> I've been working on a newly donated PDP 11/70 at the LSSM.  I just
> discovered it has a ML11 --- an early Solid State Disk.  Does anyone know
> of any schematics, user guides, etc?
>
> Thanks!
>
>
> End of cctech Digest, Vol 84, Issue 14
> **
>

Re: DEC ML11

[Chris Zach via cctalk]

Oh *NEAT* I've heard about that, it was a Massbus device and I always 
wondered: Did it just go into the Massbus slots or does it have the big 
bulkhead and all connecting it to the 70?


And of course: Can it do 18 bit mode for a KS10? Any pics and such would 
be good.


C

On 9/20/2021 10:47 AM, Mark Kahrs via cctech wrote:

I've been working on a newly donated PDP 11/70 at the LSSM.  I just
discovered it has a ML11 --- an early Solid State Disk.  Does anyone know
of any schematics, user guides, etc?

Thanks!

DEC ML11

[Mark Kahrs via cctalk]

I've been working on a newly donated PDP 11/70 at the LSSM.  I just
discovered it has a ML11 --- an early Solid State Disk.  Does anyone know
of any schematics, user guides, etc?

Thanks!

Re: Data General Terminal Question

[Mike Nealey via cctalk]

Hi!

Sorry for the slow reply. I have attached some pictures of the terminal. Thanks 
for your help!!


> On Sep 10, 2021, at 5:06 PM, Bruce Ray via cctech  
> wrote:
> 
> I am not aware of any 'standard' Data General CRT terminal with a model 
> number greater than 1400 - but I recall the 52xx model numbers were used for 
> special custom, hand-held wands, scanners and "mini-terminals" that may be 
> connected to a standard DG terminal or keyboard.  Just send a picture of the 
> terminal front and back (especially the model and part information plates) to 
> me off-list so I can better help you...
> 
> Bruce
> 
> 
> Bruce Ray
> Wild Hare Computer Systems, Inc.
> Denver, Colorado USA
> b...@wildharecomputers.com
> 
> ...preserving the Data General legacy: www.NovasAreForever.org
> 
> On 9/10/2021 1:50 PM, Mike Nealey via cctech wrote:
>> Hello all,
>> I have a Data General Model 5220 MT terminal I picked up recently. Sadly, no 
>> keyboard. I am trying to find out if the terminal will use a standard AT 
>> keyboard (based on the connector) or if I need to find a special DG 
>> keyboard. Any help is appreciated.. in fact any information about this 
>> device is appreciated.. I’m finding nothing about this terminal on the 
>> interwebs!
>> Thanks!

Re: HP 5061-3476: Which boards go where

[Chris Zach via cctalk]

Ah ok. So that first transistor on Q6 serves as a chopper to double the 
DC voltage up to 360v when using 120. When you reconfigure the jumpers 
for 240 you basically bypass that thing.


I have 240 in my shed so I'll start by seeing if there is 360v on the 
input rail. If not then I'll re-jumper to 240 and see if it appears 
then. Then trace everything forward from there


C

On 9/13/2021 1:22 AM, J. David Bryan via cctech wrote:

On Saturday, September 11, 2021 at 21:31, Chris Zach via cctech wrote:


Ok, thanks!


You're welcome.



I just tried mine again, it's a dud so I am going to have to figure it
out. First step was to see if the rectifier had any voltage so I
disconnected the + side and checked it with a voltmeter. With 120v
plugged in I saw 200v DC which is probably not too far off. That seems
to go to the inverter card, which I don't know what it's doing with
that.


There's a reasonably complete theory of operation of the "B" power supply
(which is what you have) in section IXB of the HP 1000 M/E/F-Series
Computers Engineering and Reference Documentation.  There were several
revisions of the "B" supply, but they all used the same motherboard (as far
as I know), so the various plug-in card functions would be pretty much
equivalent across versions.



Is there a block schematic of what does what on this PS?


Page IXB-6 of the above manual has one.  There's also a troubleshooting
flowchart on page IXC-3.  Section IXC is specifically for your supply
version and has the appropriate schematics, but the theory from the earlier
"B" supply should be broadly applicable.

   -- Dave

HP-UX on HP 9000/217

[Larkin Nickle via cctalk]

Hey all,

	According to 
http://bitsavers.trailing-edge.com/pdf/hp/9000_200/9000-200_periphSupp_Dec89.pdf 
(see PDF page 2), it seems as if HP-UX 5.1 should work on the 9000/217. 
http://hparchive.com/Catalogs/HP-Catalog-1986.pdf also seems to confirm 
this (PDF page 71 under Series 200 Bundled Systems, it's mentioned that 
the Model 217 can run single-user HP-UX). However, there seems to be 
conflicted information based on people that I've talked to and the 
hpmuseum page with a copy of HP-UX 5.1 whether it should work at all, 
whether 5.1 is a unified release where the boot floppy should work on 
both series 200 and 300, or whether there's another boot floppy for 
series 200 which apparently has not been archived.


	I recently obtained a Model 217 and would like to know if anyone has 
more info on this, the two people that I know of that have tried it get 
a hang on boot.


Thanks,
Larkin

Re: Wanted: Sun Sparcstation Classic/LX PS Fan

[Kurt Nowak via cctalk]

Hi Malte,
Thanks. Yes, I saw the datasheet. Unfortunately it's an obsolete fan and
Nidec doesn't seem to have a replacement in their newer lines. However the
4 wire version model E34386 with speed sensing has similar characteristics
and there are several on eBay. Looking at the fan curves however, The
E34386 doesn't do as well at the same pressure drop as the M33402. Sun
Lunch boxes are already pretty strapped for adequate cooling so I'd rather
get something a little stronger while not exceeding the M33402's 140mA
rating too much. I did happen to find a vendor who sells the M33402 but the
description was a bit ambiguous and I'm still waiting on confirmation that
it's the same fan.

http://www.nidecpg.com/fanpdfs/ta225dc.pdf

On Mon, Sep 13, 2021 at 2:00 AM Malte Dehling  wrote:

> Hi Kurt,
>
> did you see the reply you got on the res...@sunhelp.com mailing list?
>
> The fan is a 12v 60x25mm 14cfm according to the Nidec TA225DC datasheet.
>
> Cheers,
> Malte
>
> On Mon, Sep 13, 2021 at 3:17 AM Kurt Nowak via cctalk <
> cctalk@classiccmp.org> wrote:
>
>> Hi All,
>>
>> Does anyone by chance have a collection of fans? The one in my Sun Sparc
>> Classic died and I am having a hard time finding a replacement with the
>> same specs. Or can anyone recommend a good source?
>>
>> It's a Nidec BetaV, TA225DC, Model M33402-55
>>
>> Thanks!
>>
>> -Kurt
>>
>

Re: HP 5061-3476: Which boards go where

[J. David Bryan via cctalk]

On Saturday, September 11, 2021 at 21:31, Chris Zach via cctech wrote:

> Ok, thanks!

You're welcome.


> I just tried mine again, it's a dud so I am going to have to figure it
> out. First step was to see if the rectifier had any voltage so I
> disconnected the + side and checked it with a voltmeter. With 120v
> plugged in I saw 200v DC which is probably not too far off. That seems
> to go to the inverter card, which I don't know what it's doing with
> that. 

There's a reasonably complete theory of operation of the "B" power supply 
(which is what you have) in section IXB of the HP 1000 M/E/F-Series 
Computers Engineering and Reference Documentation.  There were several 
revisions of the "B" supply, but they all used the same motherboard (as far 
as I know), so the various plug-in card functions would be pretty much 
equivalent across versions.


> Is there a block schematic of what does what on this PS?

Page IXB-6 of the above manual has one.  There's also a troubleshooting 
flowchart on page IXC-3.  Section IXC is specifically for your supply 
version and has the appropriate schematics, but the theory from the earlier 
"B" supply should be broadly applicable.

  -- Dave

Re: VAXstation 100 ROM image

[Zane Healy via cctalk]

I’m rather wondering how I missed that Auction.  That’s the first time I’ve 
ever seen any photos of a VS100.  I believe it required a UNIBUS card to 
connect it to the VAX.

Zane


> On Sep 21, 2021, at 9:58 AM, Chris Zach via cctalk  
> wrote:
> 
> How the hell did I miss *that*? Cool beans device, I've never heard of a 
> VS100. Was it in a Rainbow sized box or a Pro/350 box?
> 
> 
> C
> 
> On 9/21/2021 12:35 PM, Glen Slick via cctalk wrote:
>> On Tue, Sep 21, 2021 at 9:10 AM Lars Brinkhoff via cctalk
>>  wrote:
>>> Hello,
>>> 
>>> Does anyone have a (set of) ROM image(s) for the VAXstation 100?
>>> It might be interesting to attempt an emulator.
>> Did someone on the list buy this one? That was the only one that I
>> have noticed for sale on eBay anytime recently.
>> 
>> https://www.ebay.com/itm/294252478149
>> Rare Dec Vaxstation 100 Prototype Digital VAX
>> Ended: Jul 07, 2021
>> Winning bid: US $256.00

Re: VAXstation 100 ROM image

[Chris Zach via cctalk]

How the hell did I miss *that*? Cool beans device, I've never heard of a 
VS100. Was it in a Rainbow sized box or a Pro/350 box?



C

On 9/21/2021 12:35 PM, Glen Slick via cctalk wrote:

On Tue, Sep 21, 2021 at 9:10 AM Lars Brinkhoff via cctalk
 wrote:

Hello,

Does anyone have a (set of) ROM image(s) for the VAXstation 100?
It might be interesting to attempt an emulator.

Did someone on the list buy this one? That was the only one that I
have noticed for sale on eBay anytime recently.

https://www.ebay.com/itm/294252478149
Rare Dec Vaxstation 100 Prototype Digital VAX
Ended: Jul 07, 2021
Winning bid: US $256.00

Re: VAXstation 100 ROM image

[Glen Slick via cctalk]

On Tue, Sep 21, 2021 at 9:10 AM Lars Brinkhoff via cctalk
 wrote:
>
> Hello,
>
> Does anyone have a (set of) ROM image(s) for the VAXstation 100?
> It might be interesting to attempt an emulator.

Did someone on the list buy this one? That was the only one that I
have noticed for sale on eBay anytime recently.

https://www.ebay.com/itm/294252478149
Rare Dec Vaxstation 100 Prototype Digital VAX
Ended: Jul 07, 2021
Winning bid: US $256.00

Re: Burnable, patched Microvax-2000 SCSI-boot EPROM images?

[Chris Zach via cctalk]

On 9/21/2021 12:00 PM, Jonathan Stone wrote:
The RD53s in both Microvax 2000s are dead. I'm reluctant to buy more 
30+ year old rotating media.
If I'm going to buy a disk emulator, I'd much prefer SCSI to MFM, for 
the obvious performance reasons.


Been thinking about that: I'm tempted to open one of these RD53's, leave 
it open for an hour or two, then seal it up and run it till it explodes. 
The RD53 includes an internal filter between the top of the disk platter 
(where the internal fan exhausts) and a pipe to the spot where the heads 
are. That filter has always been quite clean, I'm guessing dust and such 
from the modern house would just get caught in that with no further 
issues. I'll put that on my "to do" pile.


My main 11 runs with an MTI ESDI controller and a CDC 383mb half height 
drive. No issues at all with that generation of disk, it just purrs 
after sitting for 15 or so years. Same with the Hitachi 150mb drive. 
ESDI is pretty quick, enough for what I need these days.


C

Re: Burnable, patched Microvax-2000 SCSI-boot EPROM images?

[Paul Koning via cctalk]

> On Sep 21, 2021, at 12:00 PM, Jonathan Stone via cctalk 
>  wrote:
> 
> The RD53s in both Microvax 2000s are dead. I'm reluctant to buy more 30+ year 
> old rotating media.
> If I'm going to buy a disk emulator, I'd much prefer SCSI to MFM, for the 
> obvious performance reasons.

Emulators presumably act, performance wise, like SSDs.  Given that, an MFM 
emulator will significantly outperform a SCSI hard drive since it has no seek 
delays.

David Gesswein's MFM emulator works impressively well and is inexpensive, too.

paul

VAXstation 100 ROM image

[Lars Brinkhoff via cctalk]

Hello,

Does anyone have a (set of) ROM image(s) for the VAXstation 100?
It might be interesting to attempt an emulator.

Re: Burnable, patched Microvax-2000 SCSI-boot EPROM images?

[Jonathan Stone via cctalk]

 The RD53s in both Microvax 2000s are dead. I'm reluctant to buy more 30+ year 
old rotating media.
If I'm going to buy a disk emulator, I'd much prefer SCSI to MFM, for the 
obvious performance reasons.

Reseller price for a Maxtor XT-2190 (RD54) is just over US $1000. Disk 
Emulators are significantly cheaper.

Thirty years ago I did 4.3BSD-Tahoe kernel hacking on a Vaxstation-II/RC with 
two RD53s. One of the spindles was very noisy, I think from the bearing. I 
really like the quiet of scsi2sd in my DECstation 5000s (and soon, Alpha 
3000/500s and a /700).

 One of the reasons I got the 2000s is to format MFM drives for an RQDX3 (I 
don't have any PDP-11 CPUs). I have a CMD CQD-420 Qbus SCSi controller, and an 
MTI almost-equivalent. I've seen Glen Slick's reverse engineering of the PLD 
for the CDQ-200. I hope the newer MTI board "just works"; but if not, MFM is a 
fallback.
 On Tuesday, September 21, 2021, 08:44:11 AM PDT, Chris Zach via cctalk 
 wrote:  
 
 He could also just fix the RD53 and boot off that, then transfer to the 
much faster SCSI. I still keep the RX02's around on my pdp11 because I 
can boot BRU64k for tape backups. It works. :-)

On 9/21/2021 10:39 AM, Peter Coghlan via cctalk wrote:
> If you want to try other options, maybe you could put some minimal boot
> code on a MOP server and have your MV2000 boot from that over the network
> before it tries to access your SCSI disk?  Or put some code on a floppy disk
> and boot from that?  If you have a suitable adapter cable, you can plug a
> 5.25in HD floppy drive into your MV2000 provided it can be jumpered suitably
> to look line an RX33.  My experience with random PC drives says some can
> and some can't.  A 3.5in drive can also be used but the ROMs are expecting
> an RX33 so an RX33 disk image should be written to the 3.5in floppy.
>
> Regards,
> Peter Coghlan.
  

Re: Burnable, patched Microvax-2000 SCSI-boot EPROM images?

[Chris Zach via cctalk]

He could also just fix the RD53 and boot off that, then transfer to the 
much faster SCSI. I still keep the RX02's around on my pdp11 because I 
can boot BRU64k for tape backups. It works. :-)


On 9/21/2021 10:39 AM, Peter Coghlan via cctalk wrote:

If you want to try other options, maybe you could put some minimal boot
code on a MOP server and have your MV2000 boot from that over the network
before it tries to access your SCSI disk?  Or put some code on a floppy disk
and boot from that?  If you have a suitable adapter cable, you can plug a
5.25in HD floppy drive into your MV2000 provided it can be jumpered suitably
to look line an RX33.  My experience with random PC drives says some can
and some can't.  A 3.5in drive can also be used but the ROMs are expecting
an RX33 so an RX33 disk image should be written to the 3.5in floppy.

Regards,
Peter Coghlan.

Re: Burnable, patched Microvax-2000 SCSI-boot EPROM images?

[Peter Coghlan via cctalk]

Jonathan Stone  wrote:
>
> I recently rescued two Microvax-2000s but both have dead RD53s.  Does
> anyone have a ROMable image of the Microvax 2000/Vaxstation 2000 boot-PROM
> patches from Wolfgang Moeller at http://ftp.gwdg.de/pub/vms/pk2k/ ?  �
> I'm looking to install NetBSD, not VMS and I don't have any VMS systems
> on which to run PATCH.   Microvax 2000 specs say it can sustain 3.3MB/s
> I/O, which has to be via the SCSI interface.  So a SCSI emulator should
> be significantly higher performance than an MFM drive (either 30+ year
> old drive, or emulator).
>
> Web-searching shows a Sean O'Banion has burned the PROMs successfully; I
> haven't yet found other names.
> If someone is willing to burn at least one set of EPROMs for me, I'd pay
> for the service (either ship EPROMS, or pay for them).
> 
> �
>

I can probably burn a set of EPROMS.  You don't say where you are but if
"kiwi" in your email address is a hint, you are probably on nearly the
exact opposite side of the planet from where I am (Ireland).

If you want me to have a try, please send me eight 27256s, four for your
microvax and four for mine.  That will help cover the cost of the return
postage for your four.

If you want to try other options, maybe you could put some minimal boot
code on a MOP server and have your MV2000 boot from that over the network
before it tries to access your SCSI disk?  Or put some code on a floppy disk
and boot from that?  If you have a suitable adapter cable, you can plug a
5.25in HD floppy drive into your MV2000 provided it can be jumpered suitably
to look line an RX33.  My experience with random PC drives says some can
and some can't.  A 3.5in drive can also be used but the ROMs are expecting
an RX33 so an RX33 disk image should be written to the 3.5in floppy.

Regards,
Peter Coghlan.

Re: Classic sale/give-away Jefferson, WI USA

[Zane Healy via cctalk]

On Sep 21, 2021, at 5:35 AM, Bill Gunshannon via cctalk  
wrote:
>> Sadly don't know of much in the OVMS sphere, the openvmshobbyist forum
>> is basically dead now.
> 
> Still have comp.os.vms
> 
> bill

Oddly enough, Facebook is also a good place for DEC and OpenVMS.  Though I 
definitely prefer comp.os.vms, and a newsreader like ’tin’ is a far better 
interface.

Zane

Re: Burnable, patched Microvax-2000 SCSI-boot EPROM images?

[Holm Tiffe via cctalk]

Jonathan Stone via cctalk wrote:

> I recently rescued two Microvax-2000s but both have dead RD53s.  Does anyone 
> have a ROMable image of the Microvax 2000/Vaxstation 2000 boot-PROM patches 
> from Wolfgang Moeller at http://ftp.gwdg.de/pub/vms/pk2k/ ?   I'm looking to 
> install NetBSD, not VMS and I don't have any VMS systems on which to run 
> PATCH.   Microvax 2000 specs say it can sustain 3.3MB/s I/O, which has to be 
> via the SCSI interface.  So a SCSI emulator should be significantly higher 
> performance than an MFM drive (either 30+ year old drive, or emulator).
> 
> Web-searching shows a Sean O'Banion has burned the PROMs successfully; I 
> haven't yet found other names.
> If someone is willing to burn at least one set of EPROMs for me, I'd pay for 
> the service (either ship EPROMS, or pay for them).
> 
I've tried this almost 2 years before..and it worked "somewhat".
An VS2000 booted up in the first stage but the NetBSD Kernel couldn't
mount root since nothing in the loader expected a disk at the NCR SCSI
interface on the VS2000. Ragge agreed to look at this (bootcode) on my
VS2000, but I'vwe couldn't get an ssh connection from the internet to
an VS3100 M76 to which the VS2000 console was connected to..to work..

For yure I could burn the proms, but I think I'm on the other side of
the pond..

Regards,

Holm
-- 
   Technik Service u. Handel Tiffe, www.tsht.de, Holm Tiffe, 
 Goethestrasse 15, 09569 Oederan, USt-Id: DE253710583
i...@tsht.de Fax +49 37292 709779 Tel +49 37292 709778 Mobil: 0172 8790 741

Re: Classic sale/give-away Jefferson, WI USA

[Bill Gunshannon via cctalk]

On 9/21/21 8:16 AM, Scott Quinn via cctalk wrote:

Other places to post this:

Sun Help Rescue list - mostly Sun but there is interest in other stuff
too. http://www.sunhelp.org/mailman/listinfo/rescue


http://www.irixnet.org/ , forum not mailing list but seems to have
taken over from Nekochan for SGI stuff.

Sadly don't know of much in the OVMS sphere, the openvmshobbyist forum
is basically dead now.




Still have comp.os.vms

bill

Re: Classic sale/give-away Jefferson, WI USA

[Scott Quinn via cctalk]

Other places to post this:

Sun Help Rescue list - mostly Sun but there is interest in other stuff
too. http://www.sunhelp.org/mailman/listinfo/rescue


http://www.irixnet.org/ , forum not mailing list but seems to have
taken over from Nekochan for SGI stuff.

Sadly don't know of much in the OVMS sphere, the openvmshobbyist forum
is basically dead now. 

Re: Micropolis 1525 stuck heads

[Paul Anderson via cctalk]

I have about a dozen or so 1325,1335, and 1355 drives here, also some
earlier ones (some have the DEC label) RD50, 51,52, and even a few 54s. If
anyone is interested, please contact me off list.

Thanks, Paul

















On Mon, Sep 20, 2021 at 1:14 AM Chris Zach via cctalk 
wrote:

> That is what fixed it, hair dryer blowing around the unit. I stayed away
> from the circuit boards and just kept moving to different places. I
> thought a head was sticking, but it finally started to move a bit so it
> might have been a really gummed bearing. Or #3 head was stuck and
> loosened, most of the errors are on that head.
>
> Running it through the MFM tool got all but 200 or so sectors on the
> first pass, most errors were on head 3 but tapered off after cyl 500.
> Seems like a normal copy of Accent, no special information so it might
> not be worth taking the world apart to get it working.
>
> Thanks everyone. Back to
>
>
> On 9/20/2021 12:17 AM, Jonathan Stone via cctalk wrote:
> >   I had suggested a hair-dryer, as recommended circa 20 years ago for
> drive "stiction" after disuse. It seems that worked.
> >   On Sunday, September 19, 2021, 08:58:57 PM PDT, Bill Degnan via
> cctalk  wrote:
> >
> >   I have simply opened and physically moved the disk counter clockwise a
> > turn, in a clean dust-free place.  Or try putting in an oven on warm for
> 3
> > minutes a side, all four sides to loosen the grease.  Might sound crazy
> but
> > these have worked for me before
> > Bill
> >
> > On Sun, Sep 19, 2021, 10:18 PM Zane Healy via cctalk <
> cctalk@classiccmp.org>
> > wrote:
> >
> >> 20+ years ago, I remember people talking about disassembling these to
> fix
> >> the issue.  I’ve never tried.  Though I have one or two that might
> benefit
> >> from is.  If the CLASSICCMP archives from ’97-2000 are online, I’d
> >> recommend running a search against them.
> >>
> >> Zane
> >>
> >>
> >>
> >>
> >>> On Sep 19, 2021, at 3:58 PM, Chris Zach via cctalk <
> >> cctalk@classiccmp.org> wrote:
> >>> Ok, so out of the basement came a Micrapolis 1325 (the old Dec RD53
> >> disk) with what appears to be stuck heads. Rotor tries to move under
> power
> >> but can only take out slack. Will move backwards a bit.
> >>> Is this stuck head, and what would be the best way to free it? The
> >> reason I'm asking is this disk had a SA1000 adapter mounted under it so
> I
> >> am pretty sure it was a PERQ disk. Which means data may be priceless.
> And
> >> of course it's stuck.
> >>> Thoughts?
> >>>
> >>> CZ
> >>>
> >>
> >
>

RE: Burnable, patched Microvax-2000 SCSI-boot EPROM images?

[Dave Wade G4UGM via cctalk]

> -Original Message-
> From: Ethan Dicks 
> Sent: 21 September 2021 06:39
> To: Dave Wade ; General Discussion: On-Topic
> and Off-Topic Posts 
> Cc: Jonathan Stone 
> Subject: Re: Burnable, patched Microvax-2000 SCSI-boot EPROM images?
> 
> On Mon, Sep 20, 2021 at 5:24 PM Dave Wade G4UGM via cctalk
>  wrote:
> > Do you know what type of ROM/PROM is needed
> 
> 4x 27512 (32-bit wide image)
> 
> I have a MicroVAX 2000 but haven't managed to get that SCSI hack working
> myself.
> 
> It's been many years since I last fiddled with it.
> 
> -ethan

I am sure some one on here can blow those. I can probably do it. Its been ages 
since I did any and I am a long way from the programmer for a couple of weeks.
I was going to try for my MV2000 but it not at the top of the "to-do" pile.

Dave