AND examples:

Direct
Indirect
     SETPCSTART 20
     ORG 20
     LDA VALA
     AND VALB
     STA VALC
     HLT

VALA HEX 25
VALB HEX 31
VALC HEX 0

     SETPCSTART 20
     ORG 20
     LDA LOCA I
     AND LOCB I
     STA LOCC I
     HLT

LOCA HEX VALA
LOCB HEX VALB
LOCC HEX VALC

VALA HEX 72
VALB HEX 24
VALC HEX 0
Result is VALC gets 21
since
25 = 0010 0101
31 = 0011 0001
AND: 0010 0001

Result is VALC get 20
since
72 = 0111 0010
24 = 0010 0100
AND: 0010 0000