CST Thor 1

bagpuss22 · Post by **bagpuss22** » Sat May 20, 2017 11:27 pm

Well here we go! Keyboard and Sinclair QL monitor connected.

Relations LOL

Its Alive and the floppies respond to commands but not tested yet.

Dave · Post by **Dave** » Sat May 20, 2017 11:31 pm

Mine's never shown me video output, so your guess is as good as mine

bagpuss22 · Post by **bagpuss22** » Sat May 20, 2017 11:51 pm

It was going OK, reading and writing to floppies BUT then it reset and now it does not seem to
boot as shown before!!!

bagpuss22 · Post by **bagpuss22** » Sun May 21, 2017 12:30 am

@Derek Stewart Derek would you happen to have a spare interface board I could 'borrow' to see if this is the issue?

Its now coming up with ROM checksum failure! Luckily sometime ago I took ROM images so I will have to
compare the images to what's now on the ROMS and see.

Derek_Stewart · Post by **Derek_Stewart** » Mon May 22, 2017 9:56 am

Hi,

I sent a PM, for your address and I will send you the Thor 1 Expansion boards.

I have never had them working, as I do not have a Power Supply. I was going to use a small ATX PSU with the ATX POWER_ON as a switch.

But this is on my list of things to do...

bagpuss22 · Post by **bagpuss22** » Mon May 22, 2017 11:17 am

Derek_Stewart wrote:Hi,

I sent a PM, for your address and I will send you the Thor 1 Expansion boards.

I have never had them working, as I do not have a Power Supply. I was going to use a small ATX PSU with the ATX POWER_ON as a switch.

But this is on my list of things to do...

Hi Derek,

No PM received yet but I have PM'd you my details.

Thanks

Russ

bagpuss22 · Post by **bagpuss22** » Mon May 22, 2017 5:40 pm

Update for tonight.

Still displaying 'ROM checksum failure' after the CST Thor line. EEPROMS removed and verified against
ROM images taken several months ago and they PASS verification. SO it looks like the ROMs may not be
the issue......

Dave · Post by **Dave** » Mon May 22, 2017 6:10 pm

Do you have a copy of the Thor manual around there somewhere? I know it says something about this.

It could also be a problem decoding addresses so the ROM content is valid but the ROM addressing is faulty, so it reads mush?

dilwyn · Post by **dilwyn** » Mon May 22, 2017 7:30 pm

Don't know if there is any useful information in one of the documents here http://www.greybeardz.com/docs/thor/index.html

bagpuss22 · Post by **bagpuss22** » Mon May 22, 2017 9:13 pm

Thanks dilwyn, I think I have most of the info from your site.

One thing I have got, that you might like is V4.22 of the Thor ROM.

Russ

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