Problem with NTSC VIC-20 Core

[garlicspy]

In NTSC, the VIC-20 core is no longer functioning correctly. Many games lock up when they shouldn't.

Simple illustration: Dig Dug cartridge. Although the code is NTSC, it locks up in NTSC fairly quickly after booting up. It functions well in PAL.

Somewhere there's a timing problem.

VIC20_20200504.rbf is the latest version that doesn't do this. It does, however, suffer from sound distortion.

[LamerDeluxe]

I will check this out.

I just received my RetroCastle YC adapter and the VIC-20 core with composite output looks impressively accurate.

[Stinky]

Are you sure you have the latest release 20231208? There were NTSC issues prior to this release which were ironed out.

[Chris23235]

In NTSC, the VIC-20 core is no longer functioning correctly. Many games lock up when they shouldn't.

Simple illustration: Dig Dug cartridge. Although the code is NTSC, it locks up in NTSC fairly quickly after booting up. It functions well in PAL.

Somewhere there's a timing problem.

VIC20_20200504.rbf is the latest version that doesn't do this. It does, however, suffer from sound distortion.

What are your core settings? Which version of Dig Dug did you try? I just tried the version on the MegaCart in NTSC mode and was able to play up to Round 6 without any issues.