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AH = 55h DX = segment at which to create new PSP SI = (DOS 3.0+) value to place in memory size field at DX:[0002h]
Return:
AL destroyed
Notes: Creates a "child" PSP rather than making an exact copy of the current PSP; the new PSP's parent pointer is set to the current PSP and the reference count for each inherited file is incremented. (DOS 2.0+) sets current PSP to DX. (DOS 3.0+) marks "no inherit" file handles as closed in child PSP. This function is implemented using the same code as AH=26h, so unlike other DOS 2+ functions, it does not return status in CF, instead returning status in AL as DOS 1.x functions do (but it never puts an explicit return value in AL)
Category: DOS Kernel - Int 21h - D
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