ZiLOG Z80380 User Manual page 169

Z
ILOG
PUSH src
Operation: if (LW) then begin
SP
(SP)
(SP+1) ← src(15-8)
(SP+2) ← src(23-16)
(SP+3) ← src(31-24)
end
else begin
SP
(SP)
(SP+1) ← src(15-8)
end
The Stack Pointer (SP) is decremented by two (by four in Long Word mode) and the source
is loaded into the memory locations addressed by the SP in ascending byte order in
ascending address memory locations. The contents of the source are unaffected.
S: Unaffected
Flags:
Z: Unaffected
H: Unaffected
V: Unaffected
N: Unaffected
C: Unaffected
Addressing
Mode Syntax
PUSH SR
DC-8297-03
src = SR
← SP - 4
← src(7-0)
← SP - 2
← src(7-0)
Instruction Format
11101101 11000101
PUSH CONTROL REGISTER
Execute
Time Note
3+w L
™
Z380
U ' M
SER S ANUAL
PUSH
5-135