LOGOUT

MON 60 subfunction LOGOUT = 122B (octal) = 0x52 = 82 decimal. NPL purpose (authoritative, 5P-P2-MON60.NPL, via SINTRAN/ND500/nd-500-mon/mon60-callers/SUBFUNCTION-TABLE.md): LOGOFF PROCESS, server handler ILOGOFF.

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	110333 (framesize 000013 = 11 dec)	PROVEN (prologue 110333; 110334 JPL I 24 -> ptr 110360=177300 ENTER; inline 000013)
MON 60 call site	110355 JPL I 6 -> ptr 110363, bank1[110363]=146670 = thunk SAA 122	PROVEN
Error path	110356 (callsite+1) -> ptr 110362 = 177327 LEAVE(value)	PROVEN
Success path	110357 (callsite+2) -> ptr 110364 = 177335 LEAVE-SKIP	PROVEN

Routine 110333 is the shared ABORT/LOGOUT handler. 110340 LDA ,B -172 / 110341 JAZ -> 110351 selects LOGOUT when the flag is zero. The ABORT (117B) path (flag != 0) is documented in the folder 117B-ABORT.

Thunk verification (PROVEN, read from bytes)

146670 170522 SAA 122 ; 146671 125001 JMP I 1 ; 146672 146244 (gateway).

MON 60 subfunction used

Subfn	Octal / Hex / Dec	Thunk	Parameter-block layout (this handler)	Skip/Error
LOGOUT	122B / 0x52 / 82	146670	,X 6 = &local(B-167), the 32-bit value copied from input arg B-171	err=110356->177327; ok=110357->177335

Only slot 6 is stored (110354 STA ,X 6).

What it does

1. Copies the 32-bit input value at B-171 into local B-167. (110336-110337)
2. Reads the selector flag at B-172; a zero flag selects the LOGOUT path. (110340-110341)
3. Places &local(B-167) in gateway param slot 1 and issues MON 60 LOGOUT. (110351-110355)
4. On error -> 177327 LEAVE(value); on success -> 177335 LEAVE-SKIP.

Unknown / inferred

• PROVEN: subfunction identity, thunk bytes, the single param store, error/success returns.
• INFERRED: B-171 carries the ND-500 process identifier to log off; B-172 is the ABORT-vs-LOGOUT selector. The internal meaning of the value was not traced. Server handler ILOGOFF performs the log-off on the SINTRAN side.