ABORT

MON 60 subfunction ABORT = 117B (octal) = 0x4F = 79 decimal. NPL purpose (authoritative, 5P-P2-MON60.NPL, via SINTRAN/ND500/nd-500-mon/mon60-callers/SUBFUNCTION-TABLE.md): ABORT PROCESS, server handler IPRABORT.

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 RADD AD1 CLD SL DX; 110334 JPL I 24 -> ptr 110360=177300 ENTER; 110335 inline 000013)
MON 60 call site	110346 JPL I 13 -> ptr 110361, bank1[110361]=146657 = thunk SAA 117	PROVEN
Error path	110347 (callsite+1) -> ptr 110362 = 177327 LEAVE(value)	PROVEN
Success path	110350 (callsite+2) -> 110357 -> ptr 110364 = 177335 LEAVE-SKIP	PROVEN

Routine 110333 is a shared ABORT/LOGOUT handler: 110340 LDA ,B -172 / 110341 JAZ -> 110351 selects on a flag. flag != 0 -> ABORT (117B) at 110346; flag == 0 -> LOGOUT (122B) at 110355 (see the folder 122B-LOGOUT).

Thunk verification (PROVEN, read from bytes)

146657 170517 SAA 117 ; 146660 125001 JMP I 1 ; 146661 146244 (gateway).

MON 60 subfunction used

Subfn	Octal / Hex / Dec	Thunk	Parameter-block layout (this handler)	Skip/Error
ABORT	117B / 0x4F / 79	146657	,X 6 = &local(B-167), the 32-bit value copied from input arg B-171 (110336 LDD ,B -171 -> 110337 STD ,B -167)	err=110347->177327; ok=110350->177335

Only slot 6 is stored (110345 STA ,X 6). No slots 7/10 are marshalled.

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; nonzero selects the ABORT path. (110340-110341)
3. Places &local(B-167) in gateway param slot 1 and issues MON 60 ABORT. (110342-110346)
4. On error -> 177327 LEAVE(value) (returns error to routine 110333's caller); on success -> 177335 LEAVE-SKIP. (110347, 110350->110357->110364)

Unknown / inferred

• PROVEN: subfunction identity, thunk bytes, the single param store, and the error/success returns.
• INFERRED: B-172 is an ABORT-vs-LOGOUT selector and B-171 carries the ND-500 process identifier to abort. The internal meaning of the passed value was not traced. The server handler IPRABORT (SINTRAN side) does the actual process abort.