/vr/ - Retro Games

https://forums.atariage.com/topic/267724-problems-with-new-harmony-cart/

>says his 2600 worked fine with normal carts but would glitch when he used a Flash cart
>putting in a different 6507 fixed it
See what I mean about there being more variance in manufacturing tolerances back then. The Flash cart draws more power than a normal cart, this may have caused voltage sag and his CPU glitched as a result. Most ICs have a stated maximum and minimum amount of voltage required for stable operation but this particular 6507 might have been a little touchier about it than the one he swapped into it. That is to say one chip might work down to 4.3V but the other might only like 4.6V as the minimum current level.