Attempting to decode: 66 9d 
iclass POPF	category POP	ISA-extension BASE	ISA-set I86
instruction-length 2
operand-width 16
effective-operand-width 16
effective-address-width 32
stack-address-width 32
iform-enum-name POPF
iform-enum-name-dispatch (zero based) 0
iclass-max-iform-dispatch 1
Nominal opcode position 1
Nominal opcode 0x9d
Operands
#   TYPE               DETAILS        VIS  RW       OC2 BITS BYTES NELEM ELEMSZ   ELEMTYPE   REGCLASS
#   ====               =======        ===  ==       === ==== ===== ===== ======   ========   ========
0   REG0         REG0=STACKPOP SUPPRESSED  RW         W   16     2     1     16        INT     PSEUDO
1   MEM0           (see below) SUPPRESSED   R         W   16     2     1     16        INT    INVALID
2  BASE0             BASE0=ESP SUPPRESSED  RW       SSZ   32     4     1     32        INT        GPR
3   REG1           REG1=EFLAGS SUPPRESSED  RW         Y   32     4     1     32        INT      FLAGS
Memory Operands
  0    read SEG= SS BASE= ESP/GPR  ASZ0=32
  MemopBytes = 2
FLAGS:
   reads-rflags id-pop vip-tst vif-mod ac-pop vm-tst rf-0 nt-pop iopl-tst iopl-pop of-pop df-pop if-pop tf-pop sf-pop zf-pop af-pop pf-pop cf-pop 
       read:                   iopl vm vip  mask=0x123000
    written: of sf zf af pf cf df vif iopl if ac rf nt tf id  mask=0x2d7fd5
  undefined:                                mask=0x0
ATTRIBUTES: FIXED_BASE0 NOTSX STACKPOP0 
66-OSZ PREFIX
ANY 66 PREFIX
Number of legacy prefixes: 1 
ISA SET: [I86]