Still not ready for a new build... but 2.1c is up in the nightly check-in. I got back some speed... and there were a few other graphical glitches introduced on other games due to the fix for Stampede and Masters of the Universe. Those are all fixed now.
I'm working hard on the D1K and D2K glitch. I've reached out to the smart programmers over on Atariage for help... I got confirmation that the MiSTer FPGA implementation of the Intellivision (hardware based emulation) has the same ape-climbing glitch. That makes me feel better that even hardware emulation can have this problem. I've done an exhaustive test on the sprite priority, background handling and collision detection and I think Nintellivision is getting it all correct... the programmer for D1K and D2K is doing something tricky that may be non-standard (but that real hardware works with). I'll keep working at it.
I'm working hard on the D1K and D2K glitch. I've reached out to the smart programmers over on Atariage for help... I got confirmation that the MiSTer FPGA implementation of the Intellivision (hardware based emulation) has the same ape-climbing glitch. That makes me feel better that even hardware emulation can have this problem. I've done an exhaustive test on the sprite priority, background handling and collision detection and I think Nintellivision is getting it all correct... the programmer for D1K and D2K is doing something tricky that may be non-standard (but that real hardware works with). I'll keep working at it.