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— | en:docs:dos:api:int21:55 [2021/05/02 05:50] (current) – created prokushev | ||
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+ | {{page> | ||
+ | |||
+ | ====== Int 21H, AH=55H ====== | ||
+ | |||
+ | ===== Version ===== | ||
+ | |||
+ | 2 and higher | ||
+ | |||
+ | ===== Brief ===== | ||
+ | |||
+ | CREATE CHILD PSP | ||
+ | |||
+ | ===== Family API ===== | ||
+ | |||
+ | |||
+ | ===== Input ===== | ||
+ | |||
+ | 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 " | ||
+ | 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" | ||
+ | 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) | ||
+ | | ||
+ | ===== See also ===== | ||
+ | |||
+ | AH=26h, | ||
+ | |||
+ | ===== Note ===== | ||
+ | |||
+ | Text based on [[http:// | ||
+ | |||
+ | {{page> | ||
+ | |||
+ | {{page> | ||
+ | |||