Prince of Persia crt not working on C128

[glvas]

Excellent product and excellent support with continuous firmware updates and new features.

I have an issue in that thePrince of Persia crt is not working on my C128D setup. The crt will launch to its menu, but as soon as the game is started, the screen goes haywire, as if the VIC is driven at 2MHz all the time. I believe this game will normally run in 2MHz mode during vblank to enable smoother scrolling on the C128.

I have tried with no drives connected, JiffyDOS on and off and with all UII+ enchancements on and off, except obviously the crt functionality.

My setup is a plastic UK C128D, upgraded with 64kb VDC RAM, latest ROMs, switchable address 1751 internal drive and JiffyDOS. I am using an Ultimate II+ with latest 3.10 firmware (issue present with previous firmwares).

Thanks in advance.

[markusC64]

cf. #41