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Decrements SP by the size of the operand (two or four, byte values are sign extended) and transfers one word from source to the stack top (SS:SP).
Usage:
PUSH src PUSH immed ; (80188+ only)
Modifies flags:
none
Clocks | Size | ||||
---|---|---|---|---|---|
Operands | 808x | 286 | 386 | 486 | Bytes |
reg16 | 8 | 5 | 4 | 4 | 1 |
reg32 | 4 | - | - | 4 | 1 |
mem16 | 17+EA | 5 | 5 | 6 | 2-4 |
mem32 | 5 | - | - | 6 | 2-4 |
segreg | 5 | - | - | 6 | 2-4 |
immed | 5 | - | - | 6 | 2-4 |