TOSWP

MON 60 subfunction TOSWP = 076B (octal) = 0x3E = 62 decimal. NPL purpose (authoritative, 5P-P2-MON60.NPL): MESSAGE TO SWAPPER, server handler ITOSWP.

All addresses are OCTAL ND-100 word addresses, BANK 1, base 0. Source: SINTRAN/ND500/nd-500-mon/nd-500-mon-j04.prog.asm

Named by subfunction (TOSWP). No operator command name is invented here.

Handler location - five call sites

Every site marshals exactly one parameter: a pointer to a message block in the caller's frame (RADD ,B -> AAA <offset> -> LDX ,B -176 -> STA ,X 6).

Call site	JPL	ptr -> thunk	Enclosing routine	Param ,X 6	Error (callsite+1)	Success (callsite+2)	Status
073362	JPL I 22	073404 -> 146610	073115 (fs 000336)	&(B-167) [073361]	073363 -> 177327	073364 -> 177335	PROVEN
073675	JPL I 14	073711 -> 146610	073535 (fs 000030)	&(B-160) [073674]	073676 -> 177327	073677 -> 177335	PROVEN
073741	JPL I 7	073750 -> 146610	073713 (fs 000016)	&(B-166) [073740]	073742 -> 177327	073743 -> 177335	PROVEN
074003	JPL I 6	074011 -> 146610	073752 (fs 000025)	&(B-160) [074002]	074004 -> 177327	074005 -> 177335	PROVEN
107434	JPL I 43	107477 -> 146610	103722 (fs 000605)	&(B-165) [107433]	107435 JMP I ,B -135	107436 SAA 20	PROVEN

Cross-reference: call site 073362 lies inside routine 073115, the LIST / SET-SYSTEM-PARAMETERS handler already carved under SINTRAN/ND500/nd-500-mon/mon60-callers/LIST-SYSTEM-PARAMETERS/ (that routine also issues RSYSP 073132, RDSWP 073152, and WSYSP 073354).

Thunk bytes (verified): 146610=170476 (SAA 76), 146611=125001, 146612=146244. The four 073xxx/073xxx sites take the standard subroutine returns (177327 = LEAVE-value error, 177335 = LEAVE-SKIP success); site 107434 returns error through a frame-relative JMP I ,B -135.

MON 60 subfunction used

Subfn	Octal / Hex / Dec	Thunk	Parameter-block layout	Skip/Error
TOSWP	076B / 0x3E / 62	146610	,X 6 = pointer to a message block in the caller's frame (one param at all 5 sites)	see per-site table

What it does

At each site the caller builds a pointer to a message block already assembled in its local frame, stores it in gateway param slot 1, and issues MON 60 TOSWP to hand that message to the ND-500 swapper. Success/error take the standard returns.

Unknown / inferred

• PROVEN: exactly one parameter (,X 6) is stored at every site; no ,X 7/,X 10 store precedes any TOSWP call.
• INFERRED: the pointed-to word block is a swapper message; its layout/opcode was not traced. The store operations and the frame offsets are PROVEN.
• INFERRED (roles): routines 073535 / 073713 / 073752 are small standalone helpers that each send one swapper message; 103722 is a larger routine. Their ENTER addresses and framesizes are PROVEN; internal behaviour was not carved. 177327 (LEAVE-value) and 177335 (LEAVE-SKIP) are the runtime return helpers (PROVEN).