On Nov 1, 2021, at 6:09 PM, Nigel Johnson Ham <g4ajq1 at gmail.com> wrote: No, Zane, it is made by Dilog. I heard that the device can do both tape and disk, but that to save money on DEC's royalty payments they only put the proms in for what you bought - which is not a problem since I got two of them! I figure if you can't beat it, go with the flow! I am going to move the Plessey DCV54 to 160340 and let the SQ706 play at 172150, even though its diagnostic says its at 174500! The reason I know it is coming up at 172150 is that the DCV54 diagnostic says there is a non-DCV54 controller there, only when the SQ703(6) is plugged in. Unfortunately there are other jobs I have to do first, including fixing a very noisy power contactor in a DEC power controller that is upsetting the wife, and the microvax seems to have a ground loop voltage that is preventing me from entering anything on the console channel since I installed the power converter! Cheers, Nigel Nigel Johnson, MSc., MIEEE, MCSE VE3ID/G4AJQ/VA3MCU Amateur Radio, the origin of the open-source concept! Skype: TILBURY2591 nw.johnson at ieee.org <mailto:nw.johnson at ieee.org> On 2021-11-01 1:40 p.m., Zane Healy wrote: > Who made the SQ703/SQ706? Is this a rebadge Viking board? If so then it?s the PAL. > > I think that the OED needs to improve their definition of VAX. > > Zane > > > > >> On Nov 1, 2021, at 4:23 AM, Nigel Johnson Ham via cctalk <cctalk at classiccmp.org> <mailto:cctalk at classiccmp.org> wrote: >> >> A few months ago, thanks to help from several people here, I converted >> an SQ703 TMSCP controller to SQ706 MSCP. >> >> I had problems trying to use it on the vax due to the complexity of >> mapping Q-Bus registers under ODT, so put off trying until I got the >> LSI-11/73 going. >> >> Now I have a problem: It seems to run and recognise the controller as >> SQ706 according to the on-board diagnostics, however it insists saying >> it is at 777450, the TMSCP address. Trying to change it gives me an >> out-of-bounds message. >> >> OK, I thought, I will just use it there. >> >> Put it in to a running RT11 system and it shows up at 772150 and clashes >> with an existing controller! >> >> It seems that one of the PALs is maybe setting up the address! >> >> Anybody else tried this? >> >> cheers, >> >> Nigel >> >> Here's the fun: >> https://www(dot)bbc(dot)com/news/entertainment-arts-59089596 <https://www(dot)bbc(dot)com/news/entertainment-arts-59089596> >> >> Maybe our vax computers will become popular once again! >> >> -- >> Nigel Johnson, MSc., MIEEE, MCSE VE3ID/G4AJQ/VA3MCU >> Amateur Radio, the origin of the open-source concept! >> Skype: TILBURY2591 nw.johnson at ieee.org <mailto:nw.johnson at ieee.org> >> >> >>

On Mon, Nov 1, 2021 at 4:23 AM Nigel Johnson Ham via cctalk <cctalk at classiccmp.org> wrote: I never tried it with a Dilog SQ703 and SQ706. The two that I have have numerous differences between the boards, which made me skeptical that just a simple EPROM swap would be the only change necessary. However with the newer S-handle versions of the Dilog TMSCP SQ3703A and MSCP SQ3706A boards that I have, they appear identical except for the EPROMs. On those I did try swapping the EPROMs between the two boards and that did appear to completely swap them between TMSCP and MSCP functionality.