Maybe speed issue with VECTREX 72 Game Multicart (?)

[Rolo]

I probably noticed a speed issue with my 72 Game Multicart for Vectrex.

 

When I play "Minestorm" from cartridge, using my ownbuilt autofire joystick, the display temporaryly collapses and shows artifacts. The rapid firing obviously saturates the system somehow. I do not exactly know, where the bottleneck is, but since that problem does neither occur with the Vectrex-inbuilt "Minestorm" nor with "Minestorm" loaded into my own ownbuilt 27C... eprom cartridges, some cycles might be lost, waiting for cartridge data (?).

It's not noticeable playing with a regular Vectrex joystick -not with my slow fingers, at least-, it's just with my own controller.

 

[B4D TEMP3R 303]

same thing happens to me when I play minestorm 3 taft hack and I put the rapid fire mod on in the in game menu it sometimes mid game flash's and kinda looks like its frozen for a few secs but really its just slowdown I don't think the vectrex can handle it