Base Addressing For Relative Ref
Base/offset addressing can be used for referencing relative to a specific point in memory, e.g. the top of a stack:
3 From Top = Top + -12 = -12($4) 4100: c
2 From Top = Top + -8 = -8($4) 4104:2933c400
1 From Top = Top + -4 = -4($4) 4108:ffffffff
Top = Top + 0 = 0($4) 4112: 0
Reg 4: 00000000000000000001000000010000