Diagnostic Cartridge Not Working.

[frank.lukas]

Given your other post, I would suggest checking out the diag cart on another machine if you can.

I checked on two other machines: an Atari ST and a Stacy. the diag card works regularly and has no problems. Instead in my Mega STE I get a "Checking Bus error handling" when turned on.

I have several Atari Mega STEs and one machine is giving the same error message but the computer otherwise runs perfectly without the Diag cart. I haven't looked into it in more detail yet ...