TITLE BITMAP FOR COBOL PROGRAMS

T1=1
T2=2
T3=3
T4=4
J=16
P=17

DSK==0	;LAST CHANNEL TO BE OPENED BY LIBOL


	ENTRY BITSET,BITTST

;BITSET USING TABLE.
;01	TABLE.
;	02 X PIC 99 COMP.
;	02 Y PIC 999 COMP.
;	02 BIT PIC 9. (1 OR 0)

BITSET:	PUSH	P,T1
	PUSH	P,T2
	PUSH	P,T3
	PUSH	P,T4
	PUSHJ	P,GETARG
	MOVE	T3,BITMAP(T1)	;GET MAP WORD
	SKIPN	2(16)		;RESET?
	TDZ	T3,T4
	SKIPE	2(16)		;SET?
	TDO	T3,T4
	MOVEM	T3,BITMAP(T1)
	JRST	DONE

GETARG:	MOVE	16,(16)
	MOVE	16,(16)
	MOVE	T1,(16)		;GET X
	CAIL	T1,^D100
	JRST	BAD
	MOVE	T2,1(16)	;GET Y
	CAIL	T2,^D1000
	JRST	BAD
	SOJ	T2,
	IMULI	T2,^D100
	ADD	T1,T2
	IDIVI	T1,^D36
	MOVEI	T4,1		;MASK
	LSH	T4,(T2)		;BIT OF WORD
	POPJ	P,

BITTST:	PUSH	P,T1
	PUSH	P,T2
	PUSH	P,T3
	PUSH	P,T4
	PUSHJ	P,GETARG
	MOVEI	T3,1
	MOVEM	T3,2(16)	;ASSUME BIT ON
	MOVE	T3,BITMAP(T1)
	TDNN	T3,T4		;BIT ON?
	SETZM	2(16)		;OF COURSE NOT
DONE:	POP	P,T4
	POP	P,T3
	POP	P,T2
	POP	P,T1
	POPJ	P,

BAD:	OUTSTR	[ASCIZ/ ? INVALID BITMAP ARG
/]
	JRST	DONE


	ENTRY CLRMAP

;	ENTER MACRO CLRMAP (TO ZERO OUT MAP)


CLRMAP:	PUSH	P,T1
	MOVE	T1,[BITMAP,,BITMAP+1]
	SETZM	BITMAP		;CLEAR 1ST WORD
	BLT	T1,MAPEND	;REPLICATE THRU MAP
	POP	P,T1
	POPJ	P,



	ENTRY GETMAP,PUTMAP

;GETMAP TO LOAD BITMAP FROM DSK:NNNMAP.TMP , THEN DELETE
;PUTMAP TO WRITE BITMAP

GETMAP:	PUSHJ	P,OPNDSK	;SETUP FILE
	LOOKUP	DSK,FILE	;GET FILE
	  JRST	NOFILE
	INPUT	DSK,DMPLST	;LOAD TABLE
	RENAME	DSK,DELETE	;DELETE FILE
	RELEAS	DSK,		;RELEASE CHANNEL
	POPJ	P,		;RETURN

NOFILE:	OUTSTR	[ASCIZ/? BITMAP FILE NOT ON DSK!
/]
	POPJ	P,

PUTMAP:	PUSHJ	P,OPNDSK	;SETUP FILE
	ENTER	DSK,FILE	;OPEN FILE
	  JRST	ENTERR		;PROBLEMS
	OUTPUT	DSK,DMPLST	;OUTPUT TABLE
	RELEAS	DSK,		;RELEASE FILE
	POPJ	P,		;RETURN

ENTERR:	OUTSTR	[ASCIZ/? CANNOT ENTER BITMAP FILE!
/]
	POPJ	P,

OPNDSK:	OPEN	DSK,DSKSPC	;OPEN DEVICE
	  EXIT			;NO GOOD
	PUSH	P,T1		;SAVE AC'S
	PUSH	P,T2
	PUSH	P,T3
	PJOB	T1,		;GET JOB #
	SETZ	T3,
	IDIVI	T1,^D10		;GET DIGIT
	ORI	T2,20		;TO SIXBIT
	LSHC	T2,-6		;SHIFT INTO LH OF T3
	TLNN	T3,77		;DONE?
	JRST	.-4		;NO
	HLLM	T3,FILE
	MOVEI	T3,'MAP'
	HRRM	T3,FILE
	MOVSI	T3,'TMP'
	MOVEM	T3,FILE+1
	SETZM	FILE+2
	SETZM	FILE+3
	MOVE	T1,[IOWD ^D2800,BITMAP]
	MOVEM	T1,DMPLST
	POP	P,T3
	POP	P,T2
	POP	P,T1
	POPJ	P,

DSKSPC:	17
	SIXBIT	/DSK/
	0		;DUMP MODE REQUIRES NO BUFFERS

FILE:	EXP	0,0,0,0
DELETE:	EXP	0,0,0,0
DMPLST:	0
	0			;END OF COMMAND LIST

BITMAP:	BLOCK ^D2800
MAPEND:	0

	END