331B DiskMirroring¶
Not registered MON 331B (217 decimal) · Mnemonic MSYSU · Group: Monitor Calls for Internal Use (manual section 2.14)
Available from: not known - no compatibility box captured from the manual
Emulation source: none - not registered in ndmonlib
Description¶
Disk-mirroring control (manual section 2.14). Provides 16 sub-functions that manage disk-mirror tags, headers, layout and locks (DIMIR). Internal-use call; contract is RE-derived from the labelled handler body.
Notes¶
- Internal-use monitor call (manual section 2.14); not intended for user programs.
- Handler MSYSU at RP-P2-MSYSU.NPL:16 - 16 sub-functions (DIMIR tags / headers / layout / locks). VERIFIED (labelled handler body read).
- The 16 sub-functions are selected by a sub-function index; the exact caller convention (register/CALLG mapping) is not confirmed from the available source.
Parameters¶
| Name | Type | Direction | Description |
|---|---|---|---|
SubFunction |
INTEGER | In | UNVERIFIED - disk-mirror sub-function index (one of 16 DIMIR functions). Exact caller convention not confirmed from the available source. |
Direction: In = the program supplies the value, Out = the call returns it, In/Out = both.
Compatibility¶
| ND-100 | ND-500 | User programs | RT programs | System programs |
|---|---|---|---|---|
| Yes | No | No | No | Yes |
From the YAML extraction; this call's page in the manual had no compatibility box that was captured.
ndmonlib implementation¶
Not registered Not registered in src/core/mon_registry.c. mon_dispatch() reports the call as unimplemented.
Source¶
Reverse-engineered from SINTRAN III NPL source + ND-860228-2-EN manual (section 2.14).