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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, 0 for any type
C = dyn id, 0 tofor bypassany thedyn checkid
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 ($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 (old type wrong)
Registers changed after return:
A.BCDEHL/IXIY same
.F....../.... different
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