The Sinclair QL Forum

Thank you for the detailed anwer.

Now it looks like this:

The problem could be the QL itself:
Two times QL Cavern started from a disk (copied with Qemulator to a QL-formatted DD disk.
But only two times :(

Then I tried to load QUILL's clone from an old cartridge and the same (?) problem occurs ...

Yes, I taped them...

Hello Dilwyn, I format them with 720KB on both drives...

Hello,

I have some problems with my disk drives, controller and/or QL - I don't know :roll:
As a controller I use a Sandy Board with 512KB and the drives are a "modern" TEAC (1,44MB) and an old TEAC (720KB; Atari ST). The disks I have are used HD disks, formatted to 720KB. And the QL is a German ...

It seemed that there was no system in the appearence of the problems.

But to be honest - I have to clean up my desk and mark the available disks.
Then I have to make tests to find out, which drive can read/write which disks and if there is a pattern visible...

Hello,

I have some problems with my disk drives.
As a controller I use a Sandy Board with 512KB and the drives are a "modern" TEAC (1,44MB) and an old TEAC (720KB; Atari ST). The disks I have are used HD disks. And the QL is a German one (with German error messages - so I don't know the exact ...

... I had a cool black color monitor (Prism?) for our QL but now 25 years later I'm looking for an alternative to connect the QL to a modern VGA screen.

What a coincidence that last week I could buy the same model PRISM QL 14 monitor we had in the good old days... :D
It was offered on ebay as ...

Hello Tobias,
thanks for all your information and for the hint with these regulators.
I exchanged both - in the QL and on the disk controller.
System is working, so my modification didn't damage anything.
Let's see, if it will be more stable in the future.

Hello,

my QL crashes/freezes after some time of use.
Could this be a general heat problem?

I made a picture of the board with a disk interface attached on the left.
This heat sink of the interface becomes VERY hot after a while!
And does anybody knows, if these "modification" on the CPU are ...

My unregistered Q-emulator version has about 300kB RAM.
With this it was possible to unzip at least one or two times before the memory error came.
Then I simply started the emulatur again...