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/ DSDFMT - PROGRAM TO SET MEDIA DENSITY ON RX02 MODE CONTROLLERS
/ DSDFMT.PA	17-AUG-79	FRED ZEISE
/  DSDFMT PRINTS  "DSD FLOPPY DISK MEDIA DENSITY FORMATTER V1.1"
/ ASKS	"ENTER DRIVE # (0 OR 1):"
/	"ENTER DENSITY (S OR D):"
/ STARTS OVER AGAIN WHEN FORMAT (SET MEDIA DENSITY) IS COMPLETE
/ IF UNSUCCESSFUL TYPES "ERROR DURING SET MEDIA DENSITY
/		"PLEASE REFORMAT DISK "
/	TYPE CTRL C	TO EXIT TO OS/8
/	TYPE CTRL R	TO RESTART AND ASK DRIVE # AGAIN

	*20	/ PAGE ZERO GLOBAL DEFS

COMAND,	0	/ LAST COMMAND TO FLOPPY STORED HERE
ICHAR,	0	/ INPUT CHAR FROM KEYBOARD

B77,	77
M37,	-37
B100,	100
B237,	237
B15,	15
B12,	12
B177,	177
B200,	200

MESAGE=	JMS I .
	TYPX	/ MESSAGE OUTPUT ROUTINE

/ FLOPPY DISK IOT'S
	DEV=6750	/ STANDARD FLOPPY IOT
LCD=	DEV+1	/ LOAD COMMAND REGISTER
XDR=	DEV+2	/ TRANSFER DATA REGISTER
STRF=	DEV+3	/ SKIP ON TRANSFER REQUEST AND CLEAR FLAG
SERF=	DEV+4	/ SKIP ON ERROR FLAG AND CLEAR FLAG.
SDNF=	DEV+5	/ SKIP ON DONE FLAG AND CLEAR DONE
INIT=	DEV+7	/ INITIALIZE CONTROLLER AND DRIVES.

	*200

START,	MESAGE; HELLO	/ "DSD FLOPPY DISK MEDIA DENSITY FORMATTER"
RESTRT,	CAF		/ CLEAR ALL FLAGS AND INIT FLOPPY SYSTEM
	MESAGE; DRIVNO	/ "ENTER DRIVE # (0 OR 1):"
	TAD (10; DCA COMAND / INIT COMMAND TO SET MEDIA DENSITY.
	JMS	DISPAT	/ DISPATCH FOR DRVZRO OR DRVONE
	"0;	DRVZRO	/ DISPATCH ADDRESS LIST
	"1;	DRVONE
	"C-100;	OS8DIS	/ RETURN TO OS/8
	0
	JMP	RESTRT	/ ELSE GO BACK AND ASK DRIVE AGAIN

DRVZRO,	MESAGE; DRIVE0	/ "DRIVE 0 SELECTED!! REMOVE SYSTEM DISK!."
	JMP	DENDET	/ GOTO DENSITY DETERMINATION

DRVONE,	MESAGE; DRIVE1	/ "DRIVE 1 SELECTED"
	TAD (20; TAD COMAND; DCA COMAND

DENDET,	JMS CHKDEN	/ DETERMINE CURRENT DENSITY OF SELECTED DRIVE
	  TAD	(SINGL-DUBBLE	/ GET PTR TO "SINGLE DENSITY"
	  TAD	(DUBBLE		/ GET PTR TO "DOUBLE DENSITY"
	  DCA .+2
	MESAGE; DUBBLE		/ PRINT ACTUAL DRIVE DENSITY

DENSEL,	MESAGE; DENSTY	/ "ENTER DENSITY (S OR D):"
	JMS	DISPAT	/ GET DENSITY SELECTION.
	"S;	SINGLE
	"D;	DOUBLE
	"C-100;	OS8DIS
	"R-100;	RESTRT
	0
	JMP	DENSEL	/ ASK AGAIN IF NOT RECOGNIZED

SINGLE,	MESAGE; SINGL	/ "SINGLE DENSITY SELECTED"
	JMP	GO

DOUBLE,	MESAGE; DUBBLE	/ "DOUBLE DENSITY SELECTED"
	TAD (400; TAD COMAND; DCA COMAND

GO,	MESAGE; TSELCT
	SERF; NOP	/ CLEAR ERROR FLAG
	TAD COMAND; LCD	/ LOAD THE COMMAND
	STRF; JMP .-1	/ WAIT FOR VERIFICATION
	TAD (111; XDR	/ LOAD VERIFICATION.
	SDNF; JMP .-1	/ WAIT TILL FINISHED
	SERF; JMP FMTFIN	/ TYPE "MEDIA DENSITY SUCCESSFULLY SET"
	 MESAGE; TERROR	/ "ERROR DURING SET MEDIA DENSITY__"
	 MESAGE; TREFOR	/ "--PLEASE REFORMAT DISKETTE__"
	 JMP RESTRT

FMTFIN,	MESAGE; TMEDOK	/ 
	JMP	RESTRT	/ ASK FOR ANOTHER DISK


/ CHKDEN - DETERMINES DENSITY OF DISKETTE IN SPECIFIED DRIVE.
/ JMS	CHKDEN	/ RETURNS TO OS/8 IF NOT IN RX02 MODE.
/	SINGLE DENSITY RETURN
/	DOUBLE DENSITY RETURN

CHKDEN,	0
	CLA STL RTL; TAD COMAND	/ MAKE "READ STATUS COMMAND"
	SDNF; JMP .-1		/ WAIT FOR INIT FINISHED
	LCD
	SDNF; JMP .-1		/ WAIT FOR STATUS READY
	XDR; AND B200		/ CHECK FOR DRIVE READY
	SZA CLA; JMP .+4	/ IF NOT TYPE
	 MESAGE; TDVNTR		/ "DRIVE NOT READY"
	 JMP RESTRT		/ AND ASK "ENTER DRIVE "
	XDR; AND (10		/ CHECK "RX02 MODE"
	 SZA CLA; JMP .+4
	  MESAGE; TNTRX02	/ "CONTROLLER NOT IN RX02 MODE - EXIT."
	  JMP START		/ SAFER TO RESTART AND WAIT FOR CTRLC
	XDR; AND (40		/ CHECK DENSITY BIT
	 SZA CLA; ISZ CHKDEN	/ DO SKIP RETURN IF DOUBLE DENSITY
	JMP I CHKDEN
/ DISPATCH - DISPATCH TO ADDRESS FOLLOWING CHAR IF CHAR MATCH
/	JMS DISPATCH
/	CHAR1;  ADDRESS1
/	CHAR2;  ADDRESS2
/	 0			/ TERMINATOR

DISPAT,	0	/ DISPATCH ROUTINE
	JMS XREAD	/ GET A CHAR FROM KEYBOARD
DISPTL,	TAD I DISPAT	/ GET CHAR FROM TABLE
	ISZ	DISPAT		/ POINT TO POINTER
	SNA; JMP I DISPAT	/ RETURN FOLLOWING TABLE END.
	CIA; TAD ICHAR		/ IS CHAR = DISPATCH CHAR
	SNA CLA; JMP DISFND
	ISZ DISPAT; JMP DISPTL
DISFND,	TAD I DISPAT; DCA DISPAT	/ GET ACTUAL DISPATCH ADDRESS
	JMP I DISPAT			/ GO TO IT

OS8DIS,	CAF		/ SET FLOPPY DONE FLAG.
	JMP I .+1; 7605	/ RETURN TO OS/8

PAGE
/ TYPX - PRINT A MESSAGE POINTED TO FOLLOWING CALL.
/	MESAGE; POINTER TO TEXT; RETURNS - AC = 0
/	2 CHARACTERS HAVE SPECIAL MEANING  00=TERMINATOR AND 37 = CRLF

TYPX,	0
	CLA CLL
	TAD I TYPX; DCA TYPNT; ISZ TYPX	/ GET TEXT POINTER
TYPX1,	TAD I TYPNT		/ GET HIGH BYTE CHAR
	BSW; JMS TYPY
	TAD I TYPNT; JMS TYPY	/ GET LOW BYTE CHAR
	ISZ TYPNT; JMP TYPX1

TYPNT,	0


/ TYPY - SUBROUTINE CALLED TO DO 6 BIT CHAR UNPACK BY TYPX
/ 1)	 TESTS FOR TERMINATOR AND EXITS TYPX WHEN FOUND
/ 2)	 TESTS FOR (37) AND PRINTS CRLF WHEN FOUND
/ 3)	 CONVERTS OTHERS TO 8 BIT ASCII AND OUTPUTS

TYPY,	0
	AND B77; SNA; JMP I TYPX	/ EXIT IF 0 CHAR FOUND
	TAD M37; SZA; JMP .+3		/ TYPE CRLF AND RETURN
	  JMS PCRLF; JMP I TYPY
	SPA; TAD B100		/ ADD 100 TO A-Z
	TAD B237	/ CONVERT BACK FROM OFFSET
	JMS TLSX
	JMP I TYPY


PCRLF,	0	/ PRINT CARRIAGE RETURN LINE FEED
	CLA CLL
	TAD B15; JMS TLSX
	TAD B12; JMS TLSX
	JMP I PCRLF

TLSX,	0	/ PRINT THE CHARACTER IN THE AC AND CLEAR AC
	TLS
	TSF; JMP .-1
	CLA
	JMP I TLSX
XREAD,	0	/ RETURN WITH NEXT CHAR TYPED IN THE ICHAR.
	KSF; JMP .-1
	KRB
	AND B177; TAD B200	/ SET PARITY BIT ALWAYS
	DCA ICHAR
	TAD ICHAR; JMS TLSX
	JMS	PCRLF
	JMP I XREAD


HELLO,	TEXT	"_DSD FLOPPY DISK MEDIA DENSITY FORMATTER V1_"
	*.-1	/ BACK UP OVER TERMINATOR
	TEXT	"   CTRL C RETURNS TO OS/8_"
	*.-1
	TEXT	"   CTRL R RESTARTS DSDFMT__"
DRIVNO,	TEXT	"__ENTER DRIVE # (0 OR 1):"
DRIVE0,	TEXT	"_DRIVE 0 SELECTED ! REMOVE SYSTEM DISK !_"
DRIVE1,	TEXT	"_DRIVE 1 SELECTED "
TDVNTR,	TEXT	" DRIVE NOT READY_"
DENSTY,	TEXT	"__ENTER DENSITY (S OR D):"
DUBBLE,	TEXT	" DOUBLE DENSITY"
SINGL,	TEXT	" SINGLE DENSITY"
TSELCT,	TEXT	" SELECTED_"
TNTRX02, TEXT	"_CONTROLLER NOT IN RX02 MODE  EXIT_"
TERROR,	TEXT	"__ERROR DURING SET MEDIA DENSITY_"
TREFOR,	TEXT	"_ - PLEASE REFORMAT DISK_"
TMEDOK,	TEXT	"_SET MEDIA DENSITY COMPLETED_"

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