510B CallSwapper¶
Not registered MON 510B (328 decimal) · Mnemonic SWMC, SWAPMC · 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¶
Monitor call to the ND-500 swapper. Packs a swapper trap/function code into the ND-500 message TRAPN field and hands the message to the ND-500 swapper process for servicing. Intended for ND subsystems only.
Notes¶
- Internal-use monitor call (manual section 2.14); not intended for user programs.
- The NPL name SWMC means "monitor call to the swapper" (MP-P2-N500.NPL:2042-2043), not "switch context".
- Reverse-engineered from the level-12 handler SWMC in MP-P2-N500.NPL:2048-2051.
- Handler builds TRAPN as (MSM510 << 8) OR (low byte of the caller's TRAPN), writes it back to the message, then CALL 5ACTSWAPPER enqueues the message to the swapper.
- Dispatched via the ND-500 level-12 GOSW table, index = 510B - 500B = 8.
Parameters¶
| Name | Type | Direction | Description |
|---|---|---|---|
TrapCode |
INTEGER | In/Out | Message field TRAPN. The low 8 bits supply the swapper trap/function code; the handler ORs in the fixed swapper constant MSM510 (shifted left 8) and writes the combined value back before enqueuing the message to the swapper. |
Direction: In = the program supplies the value, Out = the call returns it, In/Out = both.
See also¶
Compatibility¶
| ND-100 | ND-500 | User programs | RT programs | System programs |
|---|---|---|---|---|
| No | Yes | 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.