Zilog Z80380 - Manual (Page 170)

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Z380 ™
U SER ' S M ANUAL
DC-8297-03
Z ILOG
PUSH
PUSH IMMEDIATE
PUSH src src = IM
Operation: if (LW) then begin
SP
←
SP - 4
(SP)
←
src(7-0)
(SP+1)
←
src(15-8)
(SP+2)
←
src(23-16)
(SP+3)
←
src(31-24)
end
else begin
SP
←
SP - 2
(SP)
←
src(7-0)
(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.
Flags: S: Unaffected
Z: Unaffected
H: Unaffected
V: Unaffected
N: Unaffected
C: Unaffected
Addressing Execute
Mode Syntax Instruction Format Time Note
IM: PUSH nn 11111101 11110101 -n(low)- -n(high) 3+w I, L