/OVERLAY TO ALLOW "DIR MTA0:" TO FUNCTION WITH MAG TAPES

FIELD 1
*4205
	6200		/ADD "2" SUFFIX ON VERSION #
/
*2137
		/MAKE MORE ROOM BY DECREASING BUFFER SIZE
		/
	5010	/FOUR BLOCKS, FIELD 10, WRITE
	5600	/BUFFER START LOCATION
*2155
	5010
*2157
	4	/BLOCKS PER BUFFER
*2165
	1000
*2176
	-1000	/# WORDS IN BUFFER

*2223
			/JUMP INTO THIS ROUTINE JUST BEFORE
			/READING NEW INPUT DIRECTORY.
	JMS I .+2
	SKP
	  RETURN
	NOP
*2356
	50		/MAKE /S FORCE /U


*5000
RETURN,	0		/COMES HERE JUST BEFORE INPUT
			/DIRECTORY LOOKED UP.
	JMS I (200
	  12		/INQUIRE
	  DEVICE MTA0
MTADDR=.-1
	  0
	CLA
	TAD MTADDR	/SAVE MTA0: # FOR RESTORATION
	DCA MTASAV
	TAD (JMP .	/CALL USR ONLY ONCE
	DCA RETURN+1
	TAD MTASAV	/HANDLE MTA0: DIFFERENTLY
	CIA
	TAD I INFPTR
	SZA CLA
	JMP ASB4	/DEVICE NOT MTA0
	TAD RETURN
	DCA RET2
	TAD (5777
	AND I (OPT1
	TAD (2000	/.OR. IN /B
	DCA I (OPT1
	TAD I (OPT1	/GET RID OF /A FOR A WHILE
	DCA O1
	CLL CMA RAR
	AND O1
	DCA I (OPT1
	TAD I (OPT1+1	/AND /X
	DCA O2
	CLL CMA RAL
	AND O2
	DCA I (OPT1+1
	TAD I (OPT1+3
	DCA EQLS
	IAC
	DCA I (OPT1+3
	CMA
	DCA ALNCNT
		ALNCNT=37
	CMA
	DCA LNCNT
		LNCNT=25
	CIF 0
	JMS I INHAND
	  1		/REWIND
	  0
	  0
	  CLA
	TAD (RSFD
	DCA LRSFD
	TAD (60		/CHECK FOR /S OPTION
	AND I (OPT1+1
	CLL RAR
	RTR
	RTR
	SZL
	JMP MASTER	/IF /T GO SETUP FOR MASTER DIRECTORY
	SNA CLA
	JMP NOSFD	/NO SFD'S TO HANDLE
MAS0,	TAD I (2620	/SAVE OLD CONTENTS AND STUFF
	DCA T1		/NEW INSTRUCTIONS FOR READING SFD
	TAD (5755	/JMP I .+1  @ 2620
	DCA I (2620
	TAD LRSFD
	DCA I (2755
	JMP NOSFD2
NOSFD,	TAD O1		/NOW ALLOW /A AND /X
	DCA I (OPT1
	TAD O2
	DCA I (OPT1+1
	TAD EQLS
	DCA I (OPT1+3
NOSFD2,	CMA		/FORCE MTA0 TO BE DIRECTORY DEVICE
	JMP I RET2

ASB4,	TAD I INFPTR
	TAD (7757
	DCA TEMP
	TAD I TEMP
	JMP I RETURN


MASTER,	CLA
	TAD (RSFDX	/LOCATION TO COME TO WHEN FILE FOUND
	DCA LRSFD
	TAD I (2541	/FIX TO RETURN TO DOIT WHEN DIRECTORY
	DCA T3		/ALL SEARCHED
	TAD (5760	/JMP I 2560 ON PAGE
	DCA I (2541
	TAD (DOIT
	DCA I (2560
	TAD (5400
	DCA BLKTBL
	JMP MAS0
EQLS,	0
T1,	0
T3,	0
O1,	0
O2,	0
LRSFD,	RSFD
RET2,	0
MTASAV,	0
INFPTR=22
TEMP=30
OPT1=7643
INHAND=24
BLOCK=32
PAGE
RSFD,	CLA		/HERE WHEN FILE FOUND AND /S
			/BUT NO /T FROM 2620 AFTER 1ST
			/FILE FOUND
			/ENTER WITH (-) LENGTH OF FILE
	TAD BLOCK	/MAKES IT FILE # OF SFD
	CIA
	DCA RSFD1
	TAD T1
	DCA I (2620
RSFDZ,	TAD (5		/MOVE INPUT FILE POINTER TO NEXT ENTRY
	TAD INFPTR
	DCA INFPTR
	TAD I INFPTR
	SZA CLA
	JMP RSFD2	/ALREADY SOMETHING THERE, ABORT
	TAD MTADDR	/NO SECOND FILE
	DCA I INFPTR	/STUFF MTA0:*.*
	TAD INFPTR
	DCA 17
	TAD (5200
	DCA I 17
	DCA I 17
	DCA I 17
	TAD (5200
	DCA I 17
RSFD2,	CIF 0
	JMS I INHAND
	  3		/SKIP FORWARD
	  0
RSFD1,	  0		/# FILES
	  HLT
	JMP NOSFD

RSFDX,			/HERE WHEN FILE FOUND AND /T
			/FROM 2620 FOR EACH FIL FOUND UNTIL
			/LAST FILE FOUND.  LAST FILE CAUSES
			/XFER TO <DOIT>.
	TAD TEMP
	IAC		/ENTER WITH FILE SIZE IN AC
	SMA CLA
	JMP RSFDY	/NOT SFD, SKIP THIS ONE
	TAD BLOCK
	DCA I BLKTBL	/SAVE THIS ONE FOR DIRECTORY
	ISZ BLKTBL
RSFDY,	JMS I (CHKR
		CHKR=3200
	JMP I (2621
	JMP I (2622

BLKTBL,	5400

DOIT,			/FROM 2541 ATER LAST FILE FOUND IN
			/EACH DIRECTORY.  SET UP BY <MASTER>.
	TAD (2200	/MAKE FUTURE RETURNS HERE SO WE GET
	DCA RET2	/NEW HEADER PRINTED
	IAC		/TRICK SYSTEM SO DIRECT THINKS IT HAS
	DCA MTADDR	/NON-MTA0: FILE-STRUCTURED DEVICE
	TAD T3		/DON'T COME TO <DOIT> AFTER LAST FILE AYMORE.
	DCA I (2541
	TAD T1		/DON'T SET UP DIRECTORY FILE #'S ANYMORE
	DCA I (2620
	TAD I (3312
	DCA T4
	TAD (5755	/JMP I 3355 @ 3312
	DCA I (3312
	TAD (.+3
	DCA I (3355
	JMP I (3213
	CLA		/COMES HERE AFTER WHOLE DIRECTORY OUTPUT
	DCA I BLKTBL
	TAD (5400
	DCA BLKTBL
	TAD I BLKTBL
	SNA
	JMP DONE
	CIA
	DCA RSFD1
	TAD (DOIT2
	DCA I (3355
	JMP RSFDZ

DOIT2,	CLA		/FROM 3312 AFTER 2ND & SUBSEQUENT
			/DIRECTORIES HAVE BEEN OUTPUT
	TAD I BLKTBL
	CIA
	ISZ BLKTBL
	TAD I BLKTBL
	CIA
	DCA RSFD1
	TAD I BLKTBL
	SNA CLA
	JMP DONE
	JMP RSFD2

DONE,	TAD T4
	DCA I (3312
	TAD MTASAV	/FIX TRICK IN CASE PROGRAM REENTERED
	DCA MTADDR
	JMP I (3311

T4,	0
$