SQ703/6 conversion and a little fun

[Zane Healy]

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> 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
> 
> 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
> 
> 
>