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Internal operating system usage. This call is used to allocate all I/O type handles. The handle type and structure is documented in handle.def file.
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IN: A = FN_AH ($01)
B = handle type
B = 0, returns the first free handle, does not allocate it properly
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 |
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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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IN: A = FN_GH ($04)
IX = first handle to test, 0 to begin with top handle
B = handle type
C = dyn id, 0 tofor bypassany thetype
check OUT, if successful: C Fc = 0, IX = handle
OUTdyn id, if0 failed:for any Fc = 1, A = RC_EOF
Registers changed after return:
..BCDEHL/..IY same
AF....../IX.. different
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IN: A = FN_NH ($05) IX = handle to test dyn id OUT, if successful: Fc = 0, IX = handle OUT, if failed: Fc = 1, A = RC_EOF Registers changed after return: ..BCDEHL/..IY same AF....../IX.. different |
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IN: A = FN_CH ($06$05) B = old type C = new type IX = handle OUT, if successful: Fc = 0, IX = same handle OUT, if failed: Fc = 1, A = RC_Hand : bad handle (old type wrong) Registers changed after return: A.BCDEHL/IXIY same .F....../.... different |
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