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| Code Block |
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IN:
LA = reason code
Other register parameters depend on reason code
OUT:
Depends on reason code, see below.
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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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| title | FN_AH (A = $01), Allocate handle |
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IN: A = FN_AH ($01)
B = handle type
B = 0, doesreturns notthe allocatefirst afree handle, properlydoes -not theallocate next handle is given the SAME numberit 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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| Code Block |
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| title | FN_VH (A = $02), Verify handle |
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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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| Code Block |
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| title | FN_FH (A = $03), Free handle |
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IN: A = FN_FH ($03)
B = handle type
IX = handle
OUT, if successful:
Fc = 0, IX = 0
OUT, if failed:
Fc = 1, A = RC_HAND
Registers changed after return:
..BCDEHL/..IY same
AF....../IX.. different |
| Code Block |
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| title | FN_AH GH (A = $04), Get (Find) handle (OZ 4.6 and newer) |
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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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| title | FN_NH CH (A = $05), Get next Change handle of same type (OZ 40Z 5.6 0 and newer) |
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IN: A = FN_NHCH ($05)
B = old type
C = new type
IX = handle
to test
OUT, if successful:
Fc = 0, IX = same handle
OUT, if failed:
Fc = 1, A = RC_EOFHand (old type wrong)
Registers changed after return:
.A.BCDEHL/..IYIXIY same
AF.F....../IX.... different
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