[vardump]

Partially MOS Technology CIA (Complex Interface Adapter) 6526. But CIA is also an I/O chip.

https://en.wikipedia.org/wiki/MOS_Technology_CIA#Interval_ti...

Same for these two, they contain not only timers, but also other peripherals:

MOS Technology 6532 RIOT (RAM-I/O-Timer): https://en.wikipedia.org/wiki/MOS_Technology_6532

MOS Technology 6522 VIA (Versatile Interface Adapter): https://en.wikipedia.org/wiki/MOS_Technology_6522

There are more similar variants of MOS I/O chips as well.