Atari ST core

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Don't Panic. Please wash hands.
  • robinsonb5

    I'm also using that beta on a v1 and I tried to copy over Cubase 3.1 from a floppy disk image to a hard disk image ( from here: ) on a 1GB SD card with 4K cluster size and I also get corruptions because either the copied files cannot be used/started, or I get TOS Error #35, or I get a timeout with an error that the output device is not ready. Can you help?

  • I now tried another SD card from Transcend with a cluster size of 32k which seems to work fine!

    Really cool to see Cubase running!!!!

  • I now tried another SD card from Transcend with a cluster size of 32k which seems to work fine!

    Really cool to see Cubase running!!!!

    Thanks for the update. I'm pretty sure the problem is something timing out because seeks are taking too long - so I'll still revisit this at some point and see if I can improve things.

  • Is it correct that the ST core has no accommodation for the difference in clock speed between NTSC and PAL versions of the Atari ST? In certain cases when using interrupts for precision timing, couldn't this affect how some programs run? More info on the difference in clock speeds at this link:…llator-frequency-choices/

    I've found high color images that display correctly in the TC64 but not on my NTSC Atari 1040STF even if I'm using the same refresh rate and TOS ROM that I'm using on my real machine. I'm wondering if this might be because the Mistery core is hard coded for the PAL clock speed and my machine has the NTSC clock speed? Most high color images display correctly on my machine, but one display program displays all the images scrambled. Apparently this display program works correctly on real PAL Atari ST hardware.

  • robinsonb5 Hey, just pinging you to see if you could provide any insight about the NTSC clock frequency question above.

    I'll be honest, I don't know enough about the Atari ST to comment on whether the clock speeds could cause the issue you're talking about. But I can confirm that the core runs on a fixed 32.084 base clock.

    The frequency being slightly off shouldn't cause anything to fail, because everything else is derived from that clock - so the entire machine will just run slightly faster or slower than intended. If there's a difference between PAL and NTSC machines in how the clock's subdivided to make slower clocks then that could account for a difference, but I don't know enough about the ST to know whether that's the case.