MicroVax II

Jerry Weiss jsw at ieee.org
Sat Jul 30 11:06:35 CDT 2016

On Jul 30, 2016, at 10:26 AM, Douglas Taylor <dj.taylor4 at comcast.net> wrote:
> On 7/29/2016 10:30 PM, Jerry Weiss wrote:
>> On Jul 29, 2016, at 8:30 PM, Zane Healy <healyzh at aracnet.com> wrote:
>>>> On Jul 29, 2016, at 6:08 PM, Douglas Taylor <dj.taylor4 at comcast.net> wrote:
>>>> I just got a MicroVax II in the BA123 world box chassis.  I has a TK50, RX50, RXDQ2, but no DEQNA.  I'd like to get it running an OS.
>>>> The DU disks don't work, but I have a couple of Qbus SCSI controllers that might come in handy.
>>>> Can you use those SD to SCSI convertors in this type of configuration?  Anyone have experience with this?
>>>> What OS's can I use with this hardware?  NetBSD?  Are versions of VMS available?  How do you get an OS onto this system?
>>> The all around best choice would be VAX/VMS v5.5-2.  You can get Hobbyist licenses.  The OS was available as part of the Hobbyist program.  If you add a SCSI adapter, you can hopefully attach a CD.  IIRC, it will run up to either v7.2 or 7.3, at least I know I had v7.2 on a MicroVAX III (well, technically I still do, if it will boot).
>>> Ultrix would also be available.
>>> What I did though was I gave it a brain transplant, and converted mine to a PDP-11 once I got a better VAX.
>>> I need to invest in a couple of those SD adapters myself.  I’d really like to put one on one of my AlphaStation 200 4/233’s.  Hopefully they’ll still work.  It’s been years since I’ve done anything with my DEC HW. :-(
>> I have booted both V7.3 and V5.5-2  off a 4GB SD with SCSI2SD V4.6 on a MicroVax II with 16 Mb.     Note that DEQNA will not work (at all) on either version.  You’ll need a DELQA.
>> You should be able to build a system with an emulator and then copy the binary to an SD card. i’ve taken images both ways without problems.   Alternately if you get a DELQA, you can netboot off of another Vaxen and build an bootable disk that way.
>> Jerry
> That is awfully good news for me.  How did you format the SD card?  What kind of drive was it emulating?
> I don't have 16 Mb, but 5 Mb.  I understand the DEQNA was not supported in VMS 5, should've kept the one I had.

I use a UC07 controller and it presents the SD/SCS2SD as a MSCP drive. It doesn’t matter what type of drive I label the drive using 
the Emulex built it utilities  (RA81, RA92..). VMS sees all the space the SCSI2SD adapter presents.   The SD is
is a block level device and can be written directly to.  No further (lower level) formatting is necessary.

	<!-- ********************************************************
	Drive geometry settings.
	********************************************************* -->



	<!-- ********************************************************
	Drive identification information. The SCSI2SD doesn't
	care what these are set to. Use these strings to trick a OS
	thinking a specific hard drive model is attached.
	********************************************************* -->

	<!-- 8 character vendor string -->
	<!-- For Apple HD SC Setup/Drive Setup, use ' SEAGATE' -->
	<vendor>DEC     </vendor>

	<!-- 16 character produce identifier -->
	<!-- For Apple HD SC Setup/Drive Setup, use '          ST225N' -->
	<prodId>RA92            </prodId>

	<!-- 4 character product revision number -->
	<!-- For Apple HD SC Setup/Drive Setup, use '1.0 ' -->

	<!-- 16 character serial number -->
	<serial>VAX50001        </serial> 

Start off by getting the Hobbyist License.   When you sign up you get access to a VMS 7.3 distribution Iso.
Then you need to sort out your install method.  Either burn the ISO and  try to boot it or go
the emulation route.  


More information about the cctalk mailing list