Event Bits vs. Memory Address

yes, some of those are outside the scope of his document:

This document contains a full listing of the event bits in the game, with the
exception of activation flags for non-player characters, which are detailed in
a separate document.

[...]

Further note that the event bits are
stored in 96 bytes of RAM from address $1E80 to $1EDF in bank $7E.

but both types are addressed via the same class of instruction:

http://www.angelfire.com/al2/imzogelmo/E...mmands.txt

see Commands D0 thru DD.

how it works:
1) there are multiple commands, each tackling different 32-byte ranges.
2) the 1-byte parameter is the BIT count from Bit 0 of Byte 0 within that 32-byte range.  say we wanted the fourth bit of the second byte.  that'd be Byte 1, Bit 3.  with there being 8 bits in a byte, our parameter would be (1 * 8) + 3 = 11d = 0Bh.

now, putting those together.  say we want overall event Byte 65d, Bit 3 (or an overall bit index of 520d or 208h).  we'd feed Parameter 0Bh to Event Command D4h or D5h.