In this demonstration I will explain the mechanics of the VBAC using a two digit binary number system calculation stack.
VBAC:
LoadSaveBlock(85132);
demonstration:
LoadSaveBlock(100661);
Before we continue, due to the state (active or inactive) of switch not saving, spark B and when the wire is clear; spark A.
To add 1 to the fist digit, spark C, the number is now 1. Spark again and it becomes 10, again and it's 11. Once more and it has an error and goes back to 0.
When you spark C it goes to the active switch (0) this then turns itself off and 1 on. When you spark again, it goes to the next row, thus drawing up a ten (or in the case of binary numbers, a two) and also turns the first digit back to 0.