DEFDOM (DEFINE STANDARD DOMAIN)

MON 60 subfunction DEFDOM = 127B (octal) = 0x57 = 87 decimal. NPL purpose (authoritative, 5P-P2-MON60.NPL, via SINTRAN/ND500/nd-500-mon/mon60-callers/SUBFUNCTION-TABLE.md): DEFINE STANDARD DOMAIN, server handler IDFSYDOM. Operator command DEFINE-STANDARD-DOMAIN (see mon60-callers/INDEX.md sec 2.1).

Standard-domain family: 127B DEFDOM (define), 130B start (already carved as START-STANDARD-DOMAIN), 131B DELDOM (delete, see 131B-DELDOM).

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

Handler location

Item	Value	Status
Enclosing ENTER-routine	045463 (framesize 003116 = 1614 dec)	PROVEN (045463 RADD AD1 CLD SL DX; 045464 JPL I 175 -> ptr 045661=177300 ENTER)
MON 60 call site	046056 JPL I 27 -> ptr 046105, bank1[046105]=146707 = thunk SAA 127	PROVEN
Error path	046057 (callsite+1) -> ptr 046100 = routine 045511	PROVEN
Success path	046060 (callsite+2) -> 046070	PROVEN

Thunk verification (PROVEN, read from bytes)

146707 170527 SAA 127 ; 146710 125001 JMP I 1 ; 146711 146244 (gateway).

MON 60 subfunction used

Subfn	Octal / Hex / Dec	Thunk	Parameter-block layout	Skip/Error
DEFDOM	127B / 0x57 / 87	146707	,X 6 = local(B+24) (domain-definition operand)	err=046057->045511; ok=046060->046070

Only slot 6 is written adjacent to the call (046055 STA ,X 6).

What it does

Routine 045463 assembles the standard-domain definition in its (large) frame, then places local(B+24) in gateway param slot 1 and issues MON 60 DEFDOM (046053-046056). On error -> handler 045511; on success -> 046070.

Unknown / inferred

• PROVEN: subfunction identity, thunk bytes, the single adjacent param store, and the error/success targets.
• INFERRED: local(B+24) is the domain-definition operand (name/descriptor or a pointer to the definition block built earlier in the routine). The exact contents were not traced. Server handler IDFSYDOM defines the standard domain.