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Code Block
titleFN_AH (A = $01), Allocate handle
IN:  A = FN_AH ($01)
	 B = handle type
     B = 0, does not allocate a handle properly - the next handle is given the SAME number

OUT, if successful:
     Fc = 0, IX = handle

OUT, if failed:
     Fc = 1, A = RC_ROOM

Registers changed after return:
     ..BCDEHL/..IY same
     AF....../IX.. different

 

 

Code Block
titleFN_VH (A = $02), Verify handle
IN:  A = FN_VH ($02)
     B = handle type
     IX = handle

OUT, if successful:
     Fc = 0

OUT, if failed
     Fc = 1, A = RC_ROOM

Registers changed after return:
     ..BCDEHL/IXIY same
     AF....../.... different

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