en:docs:xms:api:01

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en:docs:xms:api:01 [2023/11/19 10:28] prokusheven:docs:xms:api:01 [2023/12/22 15:02] (current) prokushev
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 ===== Brief ===== ===== Brief =====
  
 +Request High Memory Area
  
 ===== Family API ===== ===== Family API =====
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   AH = 01h   AH = 01h
 +  DX = Space needed in the HMA by the caller in bytes (if the caller is a TSR or device driver), DX = FFFFh (if the caller is an application program)
  
 ===== Return ===== ===== Return =====
  
 +  AX = 0001h if the HMA is assigned to the caller, 0000h otherwise 
 +  BL = Error code
  
 ===== Notes ===== ===== Notes =====