SQ703/6 conversion and a little fun
healyzh at avanthar.com
Mon Nov 1 12:40:32 CDT 2021
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.
> 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?
> Here's the fun:
> 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
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