Notes

• The stack pointer starts at the end of the stack segment and works its way closer to SS
• You can't push 8 bit register halves
• Since MOV won't operate on the Flags register, to copy it you can do PUSHF; POP BX
• As a rule of thumb, always allocate at least 512 bytes of stack space

Stack opcodes

• PUSHF / POPF - pushes pops the flags register
• PUSHA / POPA - "" AX, CX, DX, BX, SP, BP, SI & DI in that order
• PUSHAD / POPAD - "" EAX, ECX, EDX, EBX, ESP, EBP, ESI & EDI in that order
• PUSH AX / POP AX - "" AX
• PUSH [BX] / POP [BX] == - "" ==DS:BX

-- MattWalsh - 17 Apr 2004