User guide

DS4830A User’s Guide
218
POP dst Pop Word from the Stack
Description: Pops a single word from the stack (@SP) to the specified dst and decrements the stack
pointer (SP).
Status Flags: S, Z (if dst = Acc or AP or APC)
C, E (if dst = PSF)
Operation: dst  @ SP--
Encoding: 15 0
1ddd
dddd
0000
1101
Example(s): POP GR ; GR  1234h
POP @DP[0] ; @DP[0]  76h (WBS0=0)
; @DP[0]  0876h (WBS0=1)
Stack Data:
xxxxh
1234h
 SP (initial)
0876h
 SP (after POP GR)
xxxxh
 SP (after POP @DP[0])
xxxxh
POPI dst Pop Word from the Stack Enable Interrupts
Description: Pops a single word from the stack (@SP) to the specified dst and decrements the stack
pointer (SP). Additionally, POPI returns the interrupt logic to a state in which it can
acknowledge additional interrupts.
Status Flags: S, Z (if dst = Acc or AP or APC)
C, E (if dst = PSF)
Operation: dst  @ SP--
INS  0
Encoding: 15 0
1ddd
dddd
1000
1101
Example(s): See POP