The Sinclair QL Forum

The 8301 can generate a video image without a CPU. It would just be black because the CPU can't put any data in the RAM, but it would be a valid video signal.
Sure, but I already got to that point, even further: despite the fact nothing meaningful is being shown, it clearly is a stable video ...

vanpeebles wrote:Warm welcome to the forum for our 500th member!!!

Thank you!

It would try and fail immediately.
But it would run, at least, wouldn't it? That would let me know the video generator and processor are OK, at least.

I've just started reading other forum posts and found something about Minerva. Do I have to make any changes to the PCB to get it running?

I ...

Oi Ronaldo! What city in Brazil are you?
If you use Facebook, you can join our QL-Brasil group. We are few, but maybe we can help you locally:
https://www.facebook.com/groups/257954401019500/

BTW, YOU´RE MEMBER 500 OF THIS FORUM, CONGRATULATIONS! :lol:
Thank you, I've sent a request. I'm from ...

Hi there! Welcome to the forum!
Thanks!

The first thing you need to do is to get a copy of Minerva. This is a replacement OS for the QL that does more advanced memory checking. In the event of bad memory, it can often show you the location and type of memory problem.
Does the memory checking ...

As I told you, I don't know how the QL works, but I've noticed the screen is stable as I keep the reset button pressed, suggesting the video generator circuitry is OK (the processor stops and the image isn't updated anymore). I suspect there may be something wrong with the processor, RAM or ROM, and ...

Hello, my name is Ronaldo, and I'm from Brazil. I've got a Sinclair QL from a friend, sold to him as non-working. I don't have a power supply for it, so I managed to connect an ATX power supply to it. The board is missing the power connector, suggesting someone has already been working on it. As I ...