Emulated vera reset does not behave like hardware

[mooinglemur]

The real VERA hardware requires a brief period after reset in which it rejects CPU accesses.

This can result in people writing $80 to VERA_CTRL during their program's initialization routines and having their code work fine on emulator, but fail spectacularly on hardware.

[stople]

For the record: I made a simple program to measure this on hardware. While not super accurate, my measurement shows that a reset seem to take around 67 ms. https://discord.com/channels/547559626024157184/629863245934755860/1414716788591165621