SQ703/6 conversion and a little fun

Nigel Johnson Ham g4ajq1 at gmail.com
Tue Nov 2 05:32:26 CDT 2021

Thanks, you have given me hope. While the model # stickers have worn
off, there is a serial number that seems to be like 703AQ1570, and the
board has a revision K.

I'll report back when I have gone through all the gyrations to test it
on the LSI-11



Amateur Radio, the origin of the open-source concept!
Skype:  TILBURY2591 nw.johnson at ieee.org

On 2021-11-02 12:04 a.m., Glen Slick via cctalk wrote:
> On Mon, 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.
>> ......
>> It seems that one of the PALs is maybe setting up the address!
>> Anybody else tried this?
> 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.

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