015B-RESRV

MON 60 subfunction RESRV = 15B (octal) = 0x0D = 13 decimal. NPL purpose (authoritative, SUBFUNCTION-TABLE.md): RESERVE ND-500 PROCESS. Server handler: 5NOPAR (generic forward path).

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

Thunk (PROVEN, from bytes)

Addr	Word	Meaning
146357	170415	SAA 15 -> subfunction code 015 (13 dec)
146360	125001	JMP I 1
146361	146244	-> gateway

Call sites

Call site	Enclosing routine	JPL	Pointer word	Thunk	Status
010333	CASE inside command interpreter 002662 (framesize 000331, spans 002662-010634)	JPL I 163 -> 010516	bank1[010516]=146357	SAA 15	PROVEN
011142	ENTER-routine 011043 (framesize 000236), standalone	JPL I 113 -> 011255	bank1[011255]=146357	SAA 15	PROVEN

Parameter block (X := b.-176; two slots, same shape at both sites)

Slot	010333	011142
,X 6 (param1)	const from LDA 171 @010326	const from LDA 121 @011135
,X 7 (param2)	F register (T=B-114, D=012) @010332	F register (T=B-172, D=012) @011141

Both sites build param2 the same way: SAA 12 -> SWAP CLD SA DD (D:=012) -> LDT ,B -nnn -> STF ,X 7 (a 3-word F-register value written at offsets 7/10/11). The 012 constant is common to both.

Skip / error handling

• 010333: err 010334 (JPL I -56->010256; bank1[010256]=007500 = the OTHER shared interpreter error routine); ok 010335.
• 011142: err 011143 (JPL -27->011114, a 146147 local block in routine 011043); ok 011144.

Cross-reference

RESRV (15B, reserve) pairs with 016B-RELIS (release ND-500 process). Both appear as interpreter cases in the 002662 range and also in standalone routines.

Unknown / inferred

• INFERRED: ,X 6 = a mode/type/process value (pool constants LDA 171 / LDA 121, not decoded); ,X 7 = a 3-word F-register operand whose T half is a frame local and D half is the constant 012. Store addresses/operands PROVEN; semantic labels inferred.
• PROVEN: thunk bytes, both pointer resolutions to 146357, both call sites, both parameter stores at each, and the callsite+1/+2 targets (incl. 010256->007500).