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-=-=-=-=-=-=-

 LST OFF

	
*

	
F I L E  M A N A G E R     *

	
*

	
from the D O S - Source 1982  *

	
*

	
*********************************

	


	


	



SCRATCH = $27
BOOTSLOT = $2B
ROMRWTS = $3E
SECNUM = $3D
OPRND = $44
BUFADR = $42
DOSIMG = $40
IOBADR = $48
DRV0TRAK = $478
DRV1TRAK = $4F8
DOSSTRT = $9D84
DOVERIFY = $A27D
DOCLOSE = $A2EA
RWC2 = $A546
FMDRVR = $A6A8
FMDRVR0 = $A6BC
DOERROR = $A6D2
LOCBUF = $A764
KWDRPRMS = $A909
CURSTAT = $AA51
CMDINDX = $AA5F
RWTSENT = $BD00
REBOOT = $BFC8
DISKFULL = $BFED
MEMTOP = $C000
MONINIT = $FB2F
CLRHOME = $FC58
RDCHAR = $FD0C
PRBYTE = $FDDA
COUT = $FDED
SETKBD = $FE89
SETVID = $FE93

	



 ORG $AAC1

	


	


	
THE FOLLOWING ADDRESSES ARE

	
SHARED WITH THE CDI FILE

	



RWTSPADR DA TBLTYPE
VTOCPADR DA VTOCSB
DIRPADR DA DIRSECBF
 DA MEMTOP

	


	


	
File manager subroutine table.

	


	



FMFTBL DA NOERROR-1
 DA OPNHNDLR-1
 DA CLSHDLR-1
 DA RDHNDLR-1
 DA WRTHNDLR-1
 DA DELHNDL-1
 DA CATHNDL-1
 DA LCKHNDLR-1
 DA UNLKHDL-1
 DA RENHNDLR-1
 DA POSHNDLR-1
 DA INITHDL-1
 DA VFYHNDL-1
 DA NOERROR-1

	


	
Read Subcode table.

	


	



FMRSUB DA NOERROR-1
 DA RD1BYTE-1
 DA RDRANGE-1
 DA POSRD1B-1
 DA POSRDR-1
 DA NOERROR-1

	


	
Write subcode table.

	



FMWSUB DA NOERROR-1
 DA WRT1BYTE-1
 DA WRTRANGE-1
 DA POSWRT1B-1
 DA POSWRTR-1
 DA NOERROR-1

	



 ORG $AAFD

	


	


	


	
EXTERNAL ENTRY POINT FOR FILE

	
MANGER.

	


	
X=0, allocate a new file if

	
file not found in dir.

	


	
X=1, do not allocate a new file

	
if file not found.

	


	


	



FMEXT CPX #0
 BEQ FMEXT1
 LDX #2
FMEXT1 STX CMDINDX

	


	


	


	
NORMAL ENTRY FOR FILE MANAGER

	


	



FILEMGR TSX
 STX STKSAVE

	


	
GET FM PARMS

	



 JSR LDFMW

	


	
CHECK TO SEE IF WE HAVE A VALID

	
FM OPCODE..

	



 LDA FMOPCOD
 CMP #$D
 BCS FILEMGR1

	


	
USING OPCODE AS INDEX INTO

	
FMFTBL, JMP TO APPROPRIATE

	
ROUTINE.

	



 ASL 
 TAX 
 LDA FMFTBL+1,X
 PHA 
 LDA FMFTBL,X
 PHA 
 RTS 

	



 ORG $AB1F

	


	
JMP TO OPCODE RANGE ERROR

	
HANDLER

	



FILEMGR1 JMP RANGERR

	


	


	


	
OPNHNDLR- OPENS A FILE

	



OPNHNDLR JSR CMNOPN
 JMP NOERROR

	


	


	
CMNOPN- USED TO OPEN A FILE,

	
CALLED BY VARIOUS FILE MANAGER

	
ROUTINES.

	



 ORG $AB28

	


	


	
INIT FILE MANAGER WORK AREA

	



CMNOPN JSR INITFMW

	


	
SET SECTOR LENGTH TO 256 BYTEST

	



 LDA #$1
 STA SECTLEN+1

	


	
IF RECORD LEN = 0, SET TO 1

	



 LDX RECNUM+1
 LDA RECNUM
 BNE CMNOPN1
 CPX #0
 BNE CMNOPN1
 INX 
CMNOPN1 STA OPNRCLEN
 STX OPNRCLEN+1

	


	
SEARCH FOR THE FILENAME IN THE

	
DIRECTORY, ALLOCATE IF NOT FOUND

	



 JSR LCDIRENT
 BCC PLTSDIR

	


	
FILE NOT FOUND IN DIRECTORY,

	
SEE IF A FILE IS REQUIRED.

	



 STX DIRINDX
 LDX CMDINDX
 LDA KWDRPRMS,X
 LDX DIRINDX
 LSR 
 BCS CMNOPN3

	


	


	
AT THIS POINT, THE FILE MUST BE

	
PRESENT, SEE IF WE ARE LOADING

	
APPLESOFT FROM DISK.

	



 LDA CURSTAT
 CMP #$C0
 BNE CMNOPN2

	


	
LOADING AS. ERROR= LANG NOT AVL

	



 JMP LNOTAVL

	


	
LOADING A NORMAL PROGRAM, PRINT

	
FILE NOT FOUND.

	



CMNOPN2 JMP FNOTFND

	



 ORG $AB64

	


	
FILE WAS NOT REQUIRED TO BE

	
IN THE DIRECTORY, SET IT

	
UP

	


	


	
SET SECTOR COUNT TO 1

	



CMNOPN3 LDA #0
 STA FILESIZE+1,X
 LDA #$1
 STA FILESIZE,X
 STX DIRINDX

	


	
ALLOCATE A SECTOR FOR T/S LIST

	



 JSR ALLOCSEC

	


	
SET UP T/S LIST AND WORK BUFFER

	



 LDX DIRINDX
 STA TSSECTOR,X
 STA FTSS
 STA CURTSS
 LDA SCALAREA+1
 STA TSTRACK,X
 STA FTSTS
 STA CURTSTS
 LDA FILETYPE
 STA FILTYP,X

	


	
WRITE DIRECTORY BACK TO DISK

	



 JSR WRTDIRSC

	


	
INIT THE WORK BUFFER, DATA

	
BUFFER, AND T/S BUFFERS

	



 JSR SELTSBUF
 JSR ZEROBUF
 JSR SETUPRW

	


	
SET RETURN CODE TO FILE NOT FND

	



 LDX DIRINDX
 LDA #6
 STA RTNCODE

	


	


	


	
FALL THROUGH FROM ABOVE (FILE

	
CREATED AND ENTERED INTO DIR)

	


	
-OR- 

	


	
COME FROM DIR LOOKUP IF FILE

	
WAS FOUND IN DIRECTORY.

	


	


	


	
COPY T/S LIST INFO TO WORK 

	
BUFFER

	



PLTSDIR LDA TSTRACK,X
 STA FTSTS
 LDA TSSECTOR,X
 STA FTSS
 LDA FILTYP,X

	


	
COPY FILE TYPE TO WORK BUFFER

	



 STA FILETYPE
 STA FTYPE

	


	
COPY FILE SIZE TO WORK BUFFER

	



 LDA FILESIZE,X
 STA SECCNT
 LDA FILESIZE+1,X
 STA SECCNT+1
 STX DIRSECIX+1

	


	
INIT EOF TO 65535 (INFINITY) 

	



 LDA #$FF
 STA RELSLRD
 STA RELSLRD+1

	


	
SET UP # OF ENTRIES IN T/S LIST

	



 LDA NUMTSENT
 STA SECPERTS

	


	
READ IN THE FIRST T/S LIST

	
(IF THERE IS ONE)

	



 CLC 
 JMP RDTSLST

	



 ORG $ABDC

	


	
INITIALIZE FILE MANAGER WORK

	
AREA.

	


	


	
ZERO OUT T/S LIST

	



INITFMW LDA #0
 TAX 
INITFMW1 STA FTSTS,X
 INX 
 CPX #$2D
 BNE INITFMW1

	


	
INIT VOLUME # (COMPLIMENTED),

	
SLOT, AND DRIVE #.

	



 LDA VOLVAL
 EOR #$FF
 STA VOLNUMBR
 LDA DRVVAL
 STA DRVNUMBR
 LDA SLOTVAL
 ASL 
 ASL 
 ASL 
 ASL 
 TAX 
 STX SLOT16

	


	
SET UP FOR DIRECTORY TRACK

	



 LDA #$11
 STA TRKNUMBR
 RTS 

	



 ORG $AC06

	


	
CLOSE FILE HANDLER.

	


	


	
CHECK TO SEE IF DATA BUFFER OR

	
T/S BUFFER NEEDS TO BE WRITTEN

	
TO DISK.

	



CLSHDLR JSR CHKBUF
 JSR CHKTS

	


	
RELEASE ANY UNALLOCATED SECTORS

	



 JSR RLSALLC

	


	
CHECK TO SEE IF FILE SIZE

	
HAS CHANGED.

	



 LDA #2
 AND FLAGS
 BEQ CLSHDLR2

	


	
IF SO, READ VTOC, UPDATE IT,

	
READ DIR, AND UPDATE FILE SIZE

	



 JSR RWVTOC
 LDA #0
 CLC 
CLSHDLR1 JSR RDDIRSC
 SEC 
 DEC DIRSECIX
 BNE CLSHDLR1
 LDX DIRSECIX+1
 LDA SECCNT
 STA FILESIZE,X
 LDA SECCNT+1
 STA FILESIZE+1,X
 JSR WRTDIRSC

	


	
NORMAL CLOSE EXIT PT.

	



CLSHDLR2 JMP NOERROR

	



 ORG $AC3A

	


	
RENAME HANDLER.

	



RENHNDLR JSR CMNOPN ;LOOKUP FILE

	


	
SEE IF THE FILE IS LOCKED

	



 LDA FTYPE
 BMI FILOCKED

	


	


	
IF NOT, POINT BUFADR AT THE

	
SECOND FILENAME AND COPY IT

	
INTO THE DIRECTORY

	



 LDA RECNUM
 STA BUFADR
 LDA RECNUM+1
 STA BUFADR+1
 LDX DIRINDX
 JSR COPFNAM

	


	
WRITE THE DIRECTORY BACK TO

	
DISK

	



 JSR WRTDIRSC
 JMP NOERROR

	



 ORG $AC58

	


	
READ FUNCTION HANDLER.

	



RDHNDLR LDA SUBCODE

	


	
MAKE SURE SUBCODE IS < 5

	



 CMP #5
 BCS RDHNDLR1

	


	
USE SUBCODE AS INDEX INTO FMRSUB

	
TABLE, JUMP TO THAT ADDRESS

	



 ASL 
 TAX 
 LDA FMRSUB+1,X
 PHA 
 LDA FMRSUB,X
 PHA 
 RTS 
RDHNDLR1 JMP RANGERR2

	


	
ERROR EXIT POINT IF THE

	
FILE WAS LOCKED

	



FILOCKED JMP FILELOCK

	



 ORG $AC70

	


	
WRITE FUNCTION HANDLER.

	


	


	
MAKE SURE THE FILE IS NOT LOCKED

	



WRTHNDLR LDA FTYPE
 BMI FILOCKED

	


	
CHECK SUBCODE (< 5)

	



 LDA SUBCODE
 CMP #5
 BCS RDHNDLR1

	


	
USE SUBCODE AS INDEX INTO

	
FMWSUB TABLE

	



 ASL 
 TAX 
 LDA FMWSUB+1,X
 PHA 
 LDA FMWSUB,X
 PHA 
 RTS 

	



 ORG $AC87

	


	
POSITION AND READ 1 BYTE HANDLER

	


	
(POSITIONS AND DROPS THROUGH TO

	
READ ONE BYTE)

	



POSRD1B JSR CALPOSN

	


	
READ ONE BYTE ROUTINE

	



RD1BYTE JSR RDABYTE
 STA DATABYTE
 JMP NOERROR

	



 ORG $AC93

	


	
POSITION AND READ A RANGE OF

	
BYTES

	



POSRDR JSR CALPOSN

	


	
READ A RANGE OF BYTES

	



RDRANGE JSR DECRNG
 JSR RDABYTE
 PHA 
 JSR MOVRANG
 LDY #0
 PLA 
 STA (BUFADR),Y
 JMP RDRANGE

	



 ORG $ACA8

	


	
RDABYTE READS A DATA BYTE FROM

	
THE FILE, READING IN ADDITIONAL

	
SECTORS AS NECESSARY.

	



RDABYTE JSR RDNXTDA
 BCS RDABYTE1
 LDA (BUFADR),Y
 PHA 
 JSR INCREC
 JSR INCPOS
 PLA 
 RTS 
RDABYTE1 JMP ENDATA

	



 ORG $ACBB

	


	
POSITION AND WRITE ONE BYTE

	
HANDLER.

	



POSWRT1B JSR CALPOSN

	


	


	
WRITE ONE BYTE HANDLER

	



WRT1BYTE LDA DATABYTE
 JSR WRTBYTE
 JMP NOERROR

	



 ORG $ACC7

	


	
POSITION AND WRITE RANGE

	



POSWRTR JSR CALPOSN

	


	


	
WRITE A RANGE OF BYTES

	



WRTRANGE JSR MOVRANG
 LDY #0
 LDA (BUFADR),Y
 JSR WRTBYTE
 JSR DECRNG
 JMP WRTRANGE

	



 ORG $ACDA

	


	
WRITE A SINGLE BYTE TO A FILE

	



WRTBYTE PHA 
 JSR RDNXTDA
 PLA 
 STA (BUFADR),Y
 LDA #$40
 ORA FLAGS
 STA FLAGS
 JSR INCREC
 JMP INCPOS

	



 ORG $ACEF

	


	
LOCK FUNCTION HANDLER

	



LCKHNDLR LDA #$80
 STA ALLCFLG
 BNE UNLKHDL1

	



 ORG $ACF6

	


	
UNLOCK FUNCTION HANDLER

	



UNLKHDL LDA #0
 STA ALLCFLG
UNLKHDL1 JSR CMNOPN
 LDX DIRINDX
 LDA FILTYP,X
 AND #$7F
 ORA ALLCFLG
 STA FILTYP,X
 JSR WRTDIRSC
UNLKHDL2 JMP NOERROR

	



 ORG $AD12

	


	
POSITION FUNCTION HANDLER

	



POSHNDLR JSR CALPOSN
VFYHNDL2 JMP NOERROR

	



 ORG $AD18

	


	
VERIFY HANDLER

	



VFYHNDL JSR CMNOPN

	


	
READ UNTIL EOF

	



VFYHNDL1 JSR RDNXTDA
 BCS VFYHNDL2
 INC FILEPOSN
 BNE VFYHNDL1
 INC FILEPOSN+1
 JMP VFYHNDL1

	



 ORG $AD2B

	


	
DELETE HANDLER

	



DELHNDL JSR CMNOPN

	


	
SEE IF THE FILE IS LOCKED

	



 LDX DIRINDX
 LDA FILTYP,X
 BPL DELHNDL1
 JMP FILELOCK

	


	
IF THE FILE IS NOT LOCKED,

	
COPY THE T/S LIST POINTER

	
AND PUT $FF IN THE OLD

	
T/S LIST POINTER SPOT

	



DELHNDL1 LDX DIRINDX
 LDA TSTRACK,X
 STA FTSTS
 STA FILESIZE-1,X
 LDA #$FF
 STA TSTRACK,X
 LDY TSSECTOR,X
 STY FTSS

	


	
WRITE DIRECTORY BACK TO DISK

	



 JSR WRTDIRSC

	


	
READ THE T/S LIST SECTORS AND

	
UPDATE VTOC UNTIL THERE ARE

	
NO MORE T/S SECTORS

	



 CLC 
RDNXTS JSR RDTSLST
 BCS RDNXTS3
 JSR SELTSBUF
 LDY #$C
RDNXTS1 STY DIRINDX
 LDA (BUFADR),Y

	


	
IF TRACK NUMBER IS ZERO OR

	
MINUS, SKIP IT

	



 BMI RDNXTS2
 BEQ RDNXTS2

	


	
OTHERWISE UPDATE VTOC

	



 PHA 
 INY 
 LDA (BUFADR),Y
 TAY 
 PLA 
 JSR FREESCT

	


	
GET NEXT T/S PAIR

	



RDNXTS2 LDY DIRINDX
 INY 
 INY 
 BNE RDNXTS1

	


	
IF AT END OF T/S SECTOR, FREE

	
THE SECTOR IT USES AND TRY

	
TO GET THE NEXT SECTOR

	



 LDA CURTSTS
 LDY CURTSS
 JSR FREESCT
 SEC 
 BCS RDNXTS
RDNXTS3 JSR WRTVTOC
 JMP NOERROR

	



 ORG $AD89

	


	
FREESCT, DEALLOCATES A SECTOR

	
IN THE TRACK BIT MAP

	



FREESCT SEC
 JSR RRBITMP
 LDA #0
 LDX #5
FREESCT1 STA SCALAREA,X
 DEX 
 BPL FREESCT1
 RTS 

	



 ORG $AD98

	


	


	
CATALOG HANDLER

	



CATHNDL JSR INITFMW

	


	
ALLOW ANY VOLUME OF DISK

	
($FF COMPLIMENTED = VOL 0)

	



 LDA #$FF
 STA VOLNUMBR

	


	
READ VTOC TO FIND OUT WHERE

	
THE CATALOG IS

	



 JSR RWVTOC

	


	
SET UP COUNTER TO STOP EVERY 22

	
LINES

	



 LDA #$16
 STA CNTR

	


	


	
SKIP TWO LINES AND PRINT

	
"DISK VOLUME"

	



 JSR SKIPLN
 JSR SKIPLN
 LDX #$B
CATHNDL1 LDA DISKVOL,X
 JSR COUT
 DEX 
 BPL CATHNDL1

	


	
PRINT THE VOLUME NUMBER

	



 STX OPRND+1
 LDA VOLFND
 STA OPRND
 JSR PRTDEC
 JSR SKIPLN
 JSR SKIPLN

	


	


	
PRINT ALL THE DIRECTORY ENTRIES

	



 CLC 
RDNXTDIR JSR RDDIRSC
 BCS DONEXT2
 LDX #0
GTRKNUM STX DIRINDX
 LDA TSTRACK,X

	


	
IF TRACK BYTE IS ZERO, END OF

	
DIRECTORY HAS BEEN REACHED,

	
IF MINUS, FILE WAS DELETED AND

	
SHOULD NOT BE LISTED.

	



 BEQ DONEXT2
 BMI DONEXT

	


	
SEE IF THE FILE IS LOCKED

	



 LDY #" "
 LDA FILTYP,X
 BPL GTRKNUM1
 LDY #"*"
GTRKNUM1 TYA
 JSR COUT

	


	


	
OUTPUT FILE TYPE

	



 LDA FILTYP,X
 AND #$7F
 LDY #7
 ASL 
GTRKNUM2 ASL
 BCS GTRKNUM3
 DEY 
 BNE GTRKNUM2
GTRKNUM3 LDA FTTBL,Y
 JSR COUT
 LDA #$A0
 JSR COUT

	


	
OUTPUT FILE SIZE

	



 LDA FILESIZE,X
 STA OPRND
 LDA FILESIZE+1,X
 STA OPRND+1
 JSR PRTDEC
 LDA #$A0
 JSR COUT
 INX 
 INX 
 INX 

	


	
OUTPUT FILE NAME

	



 LDY #$1D
GTRKNUM4 LDA TSTRACK,X
 JSR COUT
 INX 
 DEY 
 BPL GTRKNUM4
 JSR SKIPLN

	


	
GET NEXT DIR ENTRY (READING A

	
DIR SECTOR IF REQ'D)

	



DONEXT JSR NXTDIREN
 BCC GTRKNUM
 BCS RDNXTDIR

	


	
DIR ALL DONE

	



DONEXT2 JMP NOERROR

	


	
SKIPLN- PRINTS A <CR> AND

	
CHECKS TO SEE IF THE CNTR

	
HAS BECOME ZERO OR NOT

	



SKIPLN LDA #$8D
 JSR COUT
 DEC CNTR
 BNE SKIPLN1
 JSR RDCHAR
 LDA #$15
 STA CNTR
SKIPLN1 RTS

	



 ORG $AE42

	


	
PRTDEC- PRINTS (OPRAND,OPRAND+1)

	
AS A DECIMAL INTEGER.

	



PRTDEC LDY #2
PRTDEC1 LDA #0
 PHA 
PRTDEC2 LDA OPRND
 CMP DECTBL,Y
 BCC PRTDEC3
 SBC DECTBL,Y
 STA OPRND
 LDA OPRND+1
 SBC #0
 STA OPRND+1
 PLA 
 ADC #0
 PHA 
 JMP PRTDEC2
PRTDEC3 PLA
 ORA #$B0
 JSR COUT
 DEY 
 BPL PRTDEC1
 RTS 

	



 ORG $AE6A

	


	
LOAD FILE MANAGER WORK AREA

	
FROM THE FILE BUFFER.

	



LDFMW JSR SELBUF
 LDY #0
 STY RTNCODE
LDFMW1 LDA (BUFADR),Y
 STA FTSTS,Y
 INY 
 CPY #$2D
 BNE LDFMW1
 CLC 
 RTS 

	



 ORG $AE7E

	


	
SAVE FILE MANAGER WORK AREA INTO

	
FILE BUFFER

	



SAVFMW JSR SELBUF
 LDY #0
SAVFMW1 LDA FTSTS,Y
 STA (BUFADR),Y
 INY 
 CPY #$2D
 BNE SAVFMW1
 RTS 

	



 ORG $AE8E

	


	
INIT FUNCTION HANDLER.

	



INITHDL JSR INITFMW
 LDA #4

	


	


	
INIT VTOC INFO

	



 JSR STCMDCD

	


	
Volume # must be complimented.

	



 LDA VOLNUMBR
 EOR #$FF
 STA DSKVOL

	


	
Set up next track to allocate

	
at track 17.

	



 LDA #$11
 STA NXTTOALC

	


	
Allocate sectors in positive

	
direction (from $11 up).

	



 LDA #$1
 STA ALLCDIR

	


	
Mark the "possible" 56 tracks

	
as all being used.

	



 LDX #$38
 LDA #0
INITHDL1 STA VTOCSB,X
 INX 
 BNE INITHDL1

	


	
Mark the Apple's 35 tracks as

	
unused.

	


	
Track 0 is not marked as unused

	


	



 LDX #$C
INITHDL2 CPX #$8C
 BEQ INITHDL4
 LDY #3
INITHDL3 LDA FREEMASK,Y
 STA BITMAP,X
 INX 
 DEY 
 BPL INITHDL3
 CPX #$44
 BNE INITHDL2
 LDX #$48
 BNE INITHDL2
INITHDL4 JSR WRTVTOC

	


	
INIT DIRECTORY INFO

	



 LDX #0
 TXA 
INITHDL5 STA DIRSECBF,X
 INX 
 BNE INITHDL5
 JSR PRWTSDIR

	


	
Set up for directory track

	



 LDA #$11

	


	
Set up for dir sector.

	



 LDY NUMSCTRS
 DEY 
 DEY 
 STA TNUM

	


	
Write directory sectors out to

	
disk.

	



INITHDL6 STA TSNXTDIR
INITHDL7 STY TSNXTDIR+1
 INY 
 STY SNUM
 LDA #2
 JSR STCMDCD
 LDY TSNXTDIR+1
 DEY 
 BMI INITHDL8
 BNE INITHDL7
 TYA
 BEQ INITHDL6
INITHDL8 JSR RWTSPRMS

	


	
WRITE DOS OUT TO DISK

	



 JSR PUTDOS
 JMP NOERROR

	



 ORG $AF08

	


	
SELECT A BUFFER,

	


	
FILE MANAGER WORK BUFFER

	



SELBUF LDX #0
 BEQ SELDABUF1

	


	
SELECT T/S LIST BUFFER

	



SELTSBUF LDX #2
 BNE SELDABUF1

	


	


	
SELECT DATA BUFFER

	



SLDABUF LDX #4
SELDABUF1 LDA WBADR,X
 STA BUFADR
 LDA WBADR+1,X
 STA BUFADR+1
 RTS 

	



 ORG $AF1D

	


	
CHECK DATA BUFFER TO SEE IF IT

	
NEEDS TO BE WRITTEN TO DISK

	



CHKBUF BIT FLAGS
 BVS CHKBUF1
 RTS 
CHKBUF1 JSR PREPDATA
 LDA #2
 JSR RWTSDRVR
 LDA #$BF
 AND FLAGS
 STA FLAGS
 RTS 

	



 ORG $AF34

	


	
CHECK T/S LIST BUFFER TO SEE

	
IF IT MUST BE WRITTEN TO DISK

	



CHKTS LDA FLAGS
 BMI SETUPRW
 RTS 
SETUPRW JSR PREPRWTS
 LDA #2
 JSR RWTSDRVR
 LDA #$7F
 AND FLAGS
 STA FLAGS
 RTS 

	



 ORG $AF4B

	


	
SET UP IOB FOR RWTS CALL

	



PREPRWTS LDA TSLSTADR
 STA USRBUF
 LDA TSLSTADR+1
 STA USRBUF+1
 LDX CURTSTS
 LDY CURTSS
 RTS 

	



 ORG $AF5E

	


	
READ A T/S LIST INTO THE FILE

	
BUFFER.

	


	
ON ENTRY C=0 IF FIRST T/S SECTOR

	
IS DESIRED, C=1 IF THE NEXT

	
T/S SECTOR IS DESIRED.

	



RDTSLST PHP

	


	
First, check to see if the

	
current T/S list must be

	
written to disk.

	



 JSR CHKTS
 JSR PREPRWTS
 JSR SELTSBUF
 PLP 
 BCS RDTSLST1

	


	
If the carry flag is cleared,

	
read the first sector of the

	
T/S list.

	



 LDX FTSTS
 LDY FTSS
 JMP OLDRWTS

	


	
If the carry flag was set read

	
in the next sector of the

	
T/S list.

	



RDTSLST1 LDY #$1

	


	
If the track number of the next

	
sector is zero, there isn't

	
another T/S sector available.

	



 LDA (BUFADR),Y
 BEQ RDTSLST2

	


	
If there is another T/S list

	
available read it in.

	



 TAX 
 INY 
 LDA (BUFADR),Y
 TAY 
 JMP OLDRWTS

	


	
If the File Manager Opcode is

	
isn't write, exit with error

	
status passed in carry.

	



RDTSLST2 LDA FMOPCOD
 CMP #4
 BEQ RDTSLST3
 SEC 
 RTS 

	


	
If writing to disk, simply

	
allocate another sector for

	
the T/S list and continue.

	



RDTSLST3 JSR ALLOCSEC
 LDY #2
 STA (BUFADR),Y
 PHA 
 DEY 
 LDA SCALAREA+1
 STA (BUFADR),Y
 PHA 
 JSR SETUPRW
 JSR ZEROBUF
 LDY #5
 LDA RELSLAST
 STA (BUFADR),Y
 INY 
 LDA RELSLAST+1
 STA (BUFADR),Y
 PLA 
 TAX 
 PLA 
 TAY 
 LDA #2
 BNE OLDRWTS1

	


	
If Acc=1, read old T/S list.

	
If Acc=2, write new sector for

	
T/S list.

	



OLDRWTS LDA #$1
OLDRWTS1 STX CURTSTS
 STY CURTSS
 JSR RWTSDRVR

	


	
Compute relative sector number

	
of the last sector represented

	
in this T/S list and store

	
in workarea.

	



 LDY #5
 LDA (BUFADR),Y
 STA RELSFRST
 CLC 
 ADC SECPERTS
 STA RELSLAST
 INY 
 LDA (BUFADR),Y
 STA RELSFRST+1
 ADC SECPERTS+1
 STA RELSLAST+1
 CLC 
 RTS 

	



 ORG $AFDC

	


	
READ A DATA SECTOR

	



RDDASEC JSR PREPDATA
 LDA #$1
 JMP RWTSDRVR

	


	
PREP RWTS' IOB FOR READING

	
A DATA SECTOR.

	



PREPDATA LDY DATASADR
 LDA DATASADR+1
 STY USRBUF
 STA USRBUF+1
 LDX CURDATS
 LDY CURDAS
 RTS 

	



 ORG $AFF7

	


	
READ OR WRITE THE VTOC

	



RWVTOC LDA #$1
 BNE WRTVTOC1
WRTVTOC LDA #2
WRTVTOC1 LDY VTOCPADR
 STY USRBUF
 LDY VTOCPADR+1
 STY USRBUF+1
 LDX TRKNUMBR
 LDY #0
 JMP RWTSDRVR

	



 ORG $B011

	


	
READ A DIRECTORY SECTOR

	


	
If C=0 read first dir sector.

	
If C=1 read next dir sector.

	


	



RDDIRSC PHP
 JSR PRWTSDIR
 PLP 
 BCS RDDIRSC1

	


	
Read first directory sector here

	



 LDY FRSTTS+1
 LDX FRSTTS
 BNE RDDIRSC3
RDDIRSC1 LDX TSNXTDIR
 BNE RDDIRSC2

	


	


	
If there are no more dir

	
sectors, exit with error flag

	
(carry) set.

	



 SEC 
 RTS 

	


	
Read next dir sector in chain

	
here.

	



RDDIRSC2 LDY TSNXTDIR+1
RDDIRSC3 STX DIRTS
 STY DIRTS+1
 LDA #$1
 JSR RWTSDRVR
 CLC 
 RTS 

	



 ORG $B037

	


	
WRITE A DIRECTORY SECTOR

	



WRTDIRSC JSR PRWTSDIR
 LDX DIRTS
 LDY DIRTS+1
 LDA #2
 JMP RWTSDRVR

	


	


	
PREP RWTS FOR DIRECTORY READ/WRT

	



PRWTSDIR LDA DIRPADR
 STA USRBUF
 LDA DIRPADR+1
 STA USRBUF+1
 RTS 

	



 ORG $B052

	


	
RWTS DRIVER, FINISHES UP THE IOB

	
AND CALLS THE RWTS ROUTINE

	



RWTSDRVR STX TNUM
 STY SNUM
STCMDCD STA CMDCODE
 CMP #2
 BNE STCMDCD1

	


	
If writing to disk, note this

	
in "FLAGS".

	



 ORA FLAGS
 STA FLAGS

	


	
Compliment the volume number

	



STCMDCD1 LDA VOLNUMBR
 EOR #$FF
 STA VOLEXPT

	


	
Init such niceties as slot,

	
drive, sector, etc.

	



 LDA SLOT16
 STA SNUM16
 LDA DRVNUMBR
 STA DNUM
 LDA SECTLEN
 STA BYTCNT
 LDA SECTLEN+1
 STA BYTCNT+1
 LDA #$1
 STA TBLTYPE

	


	
Call the RWTS subroutine

	



 LDY RWTSPADR
 LDA RWTSPADR+1
 JSR CLLRWTS

	


	
Fiddle with the volume numbers

	
before checking for an error

	


	



 LDA VOLFND
 STA VOLVAL
 LDA #$FF
 STA VOLEXPT

	


	
If no error, quit

	



 BCS STCMDCD2
 RTS 

	



 ORG $B0A1

	


	
Convert RWTS error # to an

	
error number usable by the

	
file manager.

	



STCMDCD2 LDA ERRRCODE
 LDY #7
 CMP #$20
 BEQ STCMDCD3
 LDY #4
 CMP #$10
 BEQ STCMDCD3
 LDY #8
STCMDCD3 TYA
 JMP SETERRR

	



 ORG $B0B6

	


	
READ NEXT DATA SECTOR IF REQ'D

	


	


	
Check to see if the current file

	
position is in the current data

	
sector buffered up in memory.

	



RDNXTDA LDA FILEPOSN
 CMP RELSLRD
 BNE RDNXTDA1
 LDA FILEPOSN+1
 CMP RELSLRD+1
 BEQ SLDBUF2

	


	
If not, see if the current

	
sector needs to be written to

	
disk.

	



RDNXTDA1 JSR CHKBUF

	


	


	
Is the desired file position

	
within the range of sectors

	
represented by the T/S list

	
currently buffered in memory?

	



RDNXTDA2 LDA FILEPOSN+1
 CMP RELSFRST+1
 BCC RDNXTDA4 ;go if <
 BNE RDNXTDA3 ;go if >
 LDA FILEPOSN
 CMP RELSFRST
 BCC RDNXTDA4

	



RDNXTDA3 LDA FILEPOSN+1
 CMP RELSLAST+1
 BCC FNDTS
 BNE RDNXTDA4
 LDA FILEPOSN
 CMP RELSLAST
 BCC FNDTS

	


	
Read in new T/S list, Carry is

	
set or cleared from CMP's above.

	


	



RDNXTDA4 JSR RDTSLST
 BCC RDNXTDA2
 RTS

	



 ORG $B0F3

	


	
DATA WAS FOUND IN CURRENT T/S

	
LIST, GET ENTRY IN THIS T/S LIST

	



FNDTS SEC 
 LDA FILEPOSN
 SBC RELSFRST
 ASL 
 ADC #$C
 TAY 
 JSR SELTSBUF
 LDA (BUFADR),Y
 BNE READOLD
 LDA FMOPCOD
 CMP #4
 BEQ FNDTS1
 SEC 
 RTS 
FNDTS1 JSR ADDATA
 JMP SAVSECNM

	



 ORG $B114

	


	
READ EXISTING DATA USING CURRENT

	
T/S LIST

	



READOLD STA CURDATS
 INY 
 LDA (BUFADR),Y
 STA CURDAS
 JSR RDDASEC

	


	
SAVE SECTOR NUMBER OF SECTOR

	
LAST READ IN THE WORKAREA

	



SAVSECNM LDA FILEPOSN
 STA RELSLRD
 LDA FILEPOSN+1
 STA RELSLRD+1

	


	


	
SELECT DATA BUFFER

	



SLDBUF2 JSR SLDABUF
 LDY FILEPOSN+2
 CLC 
 RTS 

	



 ORG $B134

	


	
ADD A NEW DATA SECTOR TO THE

	
FILE

	



ADDATA STY CNTR

	


	
Allocate a sector for the data.

	



 JSR ALLOCSEC

	


	
Put T/S numbers into T/S list.

	



 LDY CNTR
 INY 
 STA (BUFADR),Y
 STA CURDAS
 DEY 
 LDA SCALAREA+1
 STA (BUFADR),Y
 STA CURDATS

	


	
Select data buffer and zero it

	
out.

	



 JSR SLDABUF
 JSR ZEROBUF

	


	
set up flags noting that the

	
current data and T/S sectors

	
must be written to disk.

	



 LDA #$C0
 ORA FLAGS
 STA FLAGS
 RTS 

	



 ORG $B15B

	


	


	
VARIOUS UTILITIES USED ALL OVER

	
THE PLACE

	


	


	
INCREMENT RECORD NUMBER AND

	
BYTE OFFSET INTO THE FILE

	



INCREC LDX RECNUMBR
 STX RECNUM
 LDX RECNUMBR+1
 STX RECNUM+1
 LDX BYTEOFFS
 LDY BYTEOFFS+1
 STX VOLVAL
 STY DRVVAL
 INX 
 BNE INCREC1
 INY 
INCREC1 CPY OPNRCLEN+1
 BNE INCREC2
 CPX OPNRCLEN
 BNE INCREC2
 LDX #0
 LDY #0
 INC RECNUMBR
 BNE INCREC2
 INC RECNUMBR+1
INCREC2 STX BYTEOFFS
 STY BYTEOFFS+1
 RTS 

	



 ORG $B194

	


	
INCREMENT FILE POSITION

	
OFFSET

	



INCPOS INC FILEPOSN+2
 BNE INCPOS1
 INC FILEPOSN
 BNE INCPOS1
 INC FILEPOSN+1
INCPOS1 RTS

	



 ORG $B1A2

	


	
COPY AND ADVANCE RANGE ADDRESS

	



MOVRANG LDY DATABYTE
 LDX DATABYTE+1
 STY BUFADR
 STX BUFADR+1
 INC DATABYTE
 BNE MOVRANG1
 INC DATABYTE+1
MOVRANG1 RTS

	



 ORG $B1B5

	


	
DECREMENT RANGE ADDRESS

	



DECRNG LDY SLOTVAL
 BNE DECRNG1
 LDX FILETYPE
 BEQ DECRNG2
 DEC FILETYPE
DECRNG1 DEC SLOTVAL
 RTS
DECRNG2 JMP NOERROR

	



 ORG $B1C9

	


	
LOCATE A DIRECTORY ENTRY.

	
LOOKS UP A FILENAME IN THE

	
DIRECTORY.

	


	


	
Read VTOC to get track and

	
sector number of first dir

	
sector.

	



LCDIRENT JSR RWVTOC
 LDA FNADR
 STA BUFADR
 LDA FNADR+1
 STA BUFADR+1

	


	
Set up for two passes through

	
the directory.

	



 LDA #$1
INITDIR STA CNTR

	


	
Set up index into VTOC for

	
the dir track.

	



 LDA #0
 STA DIRSECIX
 CLC 

	


	
Read in the current dir sector.

	



INCSECOF INC DIRSECIX
 JSR RDDIRSC
 BCS PASS2

	


	
Check for end of dir (if first

	
byte is zero) or a deleted

	
file (if minus, really should

	
be $FF).

	



 LDX #0
GETRACK STX DIRINDX
 LDA TSTRACK,X
 BEQ DOPASS2
 BMI CHKPASS
 LDY #0
 INX 
 INX 

	


	
Compare the filename against

	
the current dir entry.

	



GETRACK1 INX
 LDA (BUFADR),Y
 CMP TSTRACK,X
 BNE GETRACK2
 INY 
 CPY #$1E
 BNE GETRACK1

	


	
If found, return with index

	
into sector in the X register

	
and the carry flag cleared.

	



 LDX DIRINDX
 CLC 
 RTS 

	



 ORG $B20B

	


	
If filename doesn't match

	
current entry, on to the next 1.

	



GETRACK2 JSR NXTDIREN
 BCC GETRACK
 BCS INCSECOF
DOPASS2 LDY CNTR
 BNE INITDIR
CHKPASS LDY CNTR
 BNE GETRACK2

	



 ORG $B21C

	


	
COPY FILE NAME TO DIRECTORY

	
ENTRY.

	



COPFNAM LDY #0
 INX 
 INX 
COPFNAM1 INX
 LDA (BUFADR),Y
 STA TSTRACK,X
 INY 
 CPY #$1E
 BNE COPFNAM1
 LDX DIRINDX
 SEC 
 RTS 

	



 ORG $B230

	


	
MOVE ON TO THE NEXT DIRECTORY

	
ENTRY.

	



NXTDIREN CLC 
 LDA DIRINDX
 ADC #$23
 TAX 
 CPX #$F5
 RTS 
PASS2 LDA #0
 LDY CNTR
 BNE INITDIR
 JMP DSKFULL

	



 ORG $B244

	


	
ALLOCATE A DISK SECTOR.

	


	
This routine finds a track in

	
the track bit map stored in

	
memory that has some empty

	
sectors left.

	
ALLOCSEC then allocates the

	
rest of those sectors and

	
gives them to the requesting

	
file.

	


	


	
First, see if there is a

	
track already allocated to this

	
file.

	



ALLOCSEC LDA SCALAREA+1
 BEQ NOTRKAVL

	


	
If so, decrement sector count

	
to find the next possible

	
sector #.

	



TSTNXT DEC SCALAREA
 BMI NOSECAVL

	


	
If a valid sector, rotate the

	
bit map to see if it is free.

	



 CLC 
 LDX #4
TSTNXT1 ROL SCALAREA+1,X
 DEX 
 BNE TSTNXT1

	


	
If not free, repeat for next

	
sector.

	



 BCC TSTNXT

	


	
If free, allocate and increment

	
file size by one.

	



 INC SECCNT
 BNE TSTNXT2
 INC SECCNT+1
TSTNXT2 LDA SCALAREA
 RTS 

	



 ORG $B265

	


	
Indicate that a track is not

	
currently allocated.

	



NOSECAVL LDA #0
 STA SCALAREA+1

	


	
Reset allocation flag to

	
allow a complete scan of the

	
bit map for available sectors.

	



NOTRKAVL LDA #0
 STA ALLCFLG
 JSR RWVTOC

	


	
Add allocation director to

	
NXTTOALLC and see if we are

	
at track zero, or past

	
track 34.

	



ADDIRCTN CLC 
 LDA NXTTOALC
 ADC ALLCDIR
 BEQ SCNDTIME
 CMP NUMTRKS
 BCC ADIRTRK1

	


	
If past track 34, set allocation

	
direction to -1.

	



 LDA #$FF
 BNE ADIRTRK
SCNDTIME LDA ALLCFLG
 BNE DODSKFUL
 LDA #$1
 STA ALLCFLG

	


	
Start at the dir track and

	
work backwards.

	



ADIRTRK STA ALLCDIR
 CLC 
 ADC #$11
ADIRTRK1 STA NXTTOALC
 STA SCALAREA+1
 TAY 
 ASL 
 ASL 
 TAY 
 LDX #4
 CLC 
ADIRTRK2 LDA BTMPEND,Y
 STA SCALAREA+1,X
 BEQ ADIRTRK3
 SEC 
 LDA #0
 STA BTMPEND,Y
ADIRTRK3 DEY
 DEX 
 BNE ADIRTRK2
 BCC ADDIRCTN

	


	
Allocated an entire track,

	
write out the VTOC so other

	
files don't use 'em

	



 JSR WRTVTOC
 LDA NUMSCTRS
 STA SCALAREA
 BNE TSTNXT
DODSKFUL JMP DSKFULL

	



 ORG $B2C3

	


	
RELEASE ANY ALLOCATED SECTORS

	
THAT WERE NOT USED.

	



RLSALLC LDA SCALAREA+1
 BNE RLSALLC1
 RTS 
RLSALLC1 PHA
 JSR RWVTOC
 LDY SCALAREA
 PLA 
 CLC 
 JSR RRBITMP
 LDA #0
 STA SCALAREA+1
 JMP WRTVTOC

	



 ORG $B2DD

	


	
ROTATE THE BIT MAP RIGHT ONE

	
BIT.

	
THIS CHECKS FOR AVAILABLE SECS

	



RRBITMP LDX #$FC
RRBITMP1 ROR TMPBITMP,X
 INX 
 BNE RRBITMP1
 INY 
 CPY NUMSCTRS
 BNE RRBITMP
 ASL 
 ASL 
 TAY 
 BEQ RRBITMP3
 LDX #4
RRBITMP2 LDA SCALAREA+1,X
 ORA BTMPEND,Y
 STA BTMPEND,Y
 DEY 
 DEX 
 BNE RRBITMP2
RRBITMP3 RTS

	



 ORG $B300

	


	
CALCULATE FILE POSITION.

	


	
GIVEN A RECORD NUMBER, A FILE

	
LENGTH, AND A BYTE OFFSET THIS

	
ROUTINE CALCULATES THE OFFSET

	
INTO THE FILE TO FIND THE

	
DESIRED RECORD.

	



CALPOSN LDA RECNUM
 STA FILEPOSN+2
 STA RECNUMBR
 LDA RECNUM+1
 STA FILEPOSN
 STA RECNUMBR+1
 LDA #0
 STA FILEPOSN+1
 LDY #$10
CALPOSN1 TAX
 LDA FILEPOSN+2
 LSR 
 BCS CALPOSN2
 TXA 
 BCC CALPOSN3
CALPOSN2 CLC
 LDA FILEPOSN+1
 ADC OPNRCLEN
 STA FILEPOSN+1
 TXA 
 ADC OPNRCLEN+1
CALPOSN3 ROR
 ROR FILEPOSN+1
 ROR FILEPOSN
 ROR FILEPOSN+2
 DEY 
 BNE CALPOSN1
 LDA VOLVAL
 STA BYTEOFFS
 ADC FILEPOSN+2
 STA FILEPOSN+2
 LDA DRVVAL
 STA BYTEOFFS+1
 ADC FILEPOSN
 STA FILEPOSN
 LDA #0
 ADC FILEPOSN+1
 STA FILEPOSN+1
 RTS 

	



 ORG $B35F

	


	
MULTIPLY CALLED ERROR MESSAGES

	



LNOTAVL LDA #$1
 BNE SETERRR
RANGERR LDA #2
 BNE SETERRR
RANGERR2 LDA #3
 BNE SETERRR
 LDA #4
 BNE SETERRR
ENDATA LDA #5
 BNE SETERRR
FNOTFND LDA #6
 BNE SETERRR
DSKFULL JMP DISKFULL
 NOP 
FILELOCK LDA #$A
 BNE SETERRR
NOERROR LDA RTNCODE
 CLC 
 BCC SETERRR1

	



 ORG $B385

	


	
STANDARD ERROR ENTRY POINT

	



SETERRR SEC
SETERRR1 PHP
 STA RTNCODE
 LDA #0
 STA IOBADR
 JSR SAVFMW
 PLP 
 LDX STKSAVE
 TXS 
 RTS 

	



 ORG $B397

	


	
VARIABLES ETC.

	



DIRTS DS 2
 DS 2
STKSAVE DS 1
DIRINDX DS 1
CNTR DS 1
ALLCFLG DS 2
FREEMASK DS 4
DECTBL HEX 010A64
FTTBL ASC "TIABSRAB"
DISKVOL ASC " EMULOV KSID"
VTOCSB DS 1
FRSTTS DS 2
DOSRLS HEX 03
 DS 2
DSKVOL DS $21
NUMTSENT DS 9
NXTTOALC DS 1
ALLCDIR DS 3
NUMTRKS DS 1
NUMSCTRS DS 3
BITMAP DS 3
BTMPEND DS $C5
DIRSECBF DS 1
TSNXTDIR DS 10
TSTRACK DS 1
TSSECTOR DS 1
FILTYP DS $1F
FILESIZE DS $F
TMPBITMP DS $AE
PTCHSAV DS $17

	


	


	



FMOPCOD DS 1
SUBCODE DS 1
RECNUM DS 2
VOLVAL DS 1
DRVVAL DS 1
SLOTVAL DS 1
FILETYPE DS 1
DATABYTE = *
FNADR DS 2
RTNCODE DS 2
WBADR DS 2
TSLSTADR DS 2
DATASADR DS 2
 DS 4
FTSTS DS 1
FTSS DS 1
CURTSTS DS 1
CURTSS DS 1
FLAGS DS 1
CURDATS DS 1
CURDAS DS 1
DIRSECIX DS 2
SECPERTS DS 2
RELSFRST DS 2
RELSLAST DS 2
RELSLRD DS 2
SECTLEN DS 2
FILEPOSN DS 3
 DS 1
OPNRCLEN DS 2
RECNUMBR DS 2
BYTEOFFS DS 2
SECCNT DS 2
SCALAREA DS 1
 DS 5
FTYPE DS 1
SLOT16 DS 1
DRVNUMBR DS 1
VOLNUMBR DS 1
TRKNUMBR DS 6

	



 ORG $800

	


	
START OF 2ND STAGE BOOTSTRAP

	



BOOT HEX 01
 LDA SCRATCH
 CMP #9
 BNE BOOT1
 LDA BOOTSLOT
 LSR 
 LSR 
 LSR 
 LSR 
 ORA #$C0
 STA ROMRWTS+1
 LDA #$5C
 STA ROMRWTS
 CLC 
 LDA FRSTPAG
 ADC NUMSECS
 STA FRSTPAG
BOOT1 LDX NUMSECS
 BMI BOOT2
 LDA SECTABL,X
 STA SECNUM
 DEC NUMSECS
 LDA FRSTPAG
 STA SCRATCH
 DEC FRSTPAG
 LDX BOOTSLOT
 JMP (ROMRWTS)
BOOT2 INC FRSTPAG
 INC FRSTPAG
 JSR SETKBD
 JSR SETVID
 JSR MONINIT
 LDX BOOTSLOT
 JMP (JMP2BOOT)

	


	



SECTABL HEX 000D0B0907
 HEX 0503010E0C
 HEX 0A080604
 HEX 02
 HEX 0F

	


	


	
THE FOLLOWING ARE ALL PATCHES

	
FOR APPEND AND VERIFY

	


	



APPFLG DFB 0
APDPTCH JSR LOCBUF
 BCS APDPTCH1
 LDA #0
 TAY 
 STA APPFLG
 STA (DOSIMG),Y
APDPTCH1 LDA RTNCODE
 JMP DOERROR
 LDA APPFLG
 BEQ APDPTCH2
 INC RECNUM
 BNE APDPTCH2
 INC RECNUM+1
APDPTCH2 LDA #0
 STA APPFLG
 JMP RWC2
 STA SUBCODE
 JSR FMDRVR
 JSR DOCLOSE
 JMP DOVERIFY
 LDY #$13
APDPTCH3 LDA (BUFADR),Y
 BNE APDPTCH6
 INY 
 CPY #$17
 BNE APDPTCH3
 LDY #$19
APDPTCH4 LDA (BUFADR),Y
 STA PTCHSAV,Y
 INY 
 CPY #$1D
 BNE APDPTCH4
APDPTCH5 JMP FMDRVR0
APDPTCH6 LDX #$FF
 STX APPFLG
 BNE APDPTCH5

	


	



 DS 19
 DS 24
 DS 31

	



JMP2BOOT DS 1
FRSTPAG HEX 36
NUMSECS HEX 09

	



 ORG $3600

	


	
DOS SECOND STAGE BOOT PGM

	



 STX SNUM16
 STX SLOTFND
 LDA #$1
 STA DRVFND
 STA DNUM
 LDA NUMPGS
 STA NSECSRW
 LDA #2
 STA TNUM
 LDA #4
 STA SNUM
 LDY FRSTBOOT+1
 DEY 
 STY USRBUF+1
 LDA #$1
 STA CMDCODE
 TXA 
 LSR 
 LSR 
 LSR 
 LSR 
 TAX 
 LDA #0
 STA DRV1TRAK,X
 STA DRV0TRAK,X
 JSR RWPAGES
 LDX #$FF
 TXS 
 STX VOLEXPT
 JMP REBOOT
 JSR SETKBD
 JMP DOSSTRT

	


	
PUTDOS- WRITES DOS ON FIRST

	
TWO TRACKS OF DISK

	



PUTDOS LDA FRSTBOOT+1
 SEC 
 SBC USRBUF+1
 STA NSECSRW
 LDA FRSTBOOT+1
 STA USRBUF+1
 DEC USRBUF+1
 LDA #2
 STA TNUM
 LDA #4
 STA SNUM
 LDA #2
 STA CMDCODE
 JSR RWPAGES
 LDA FRSTBOOT+1
 STA FRSTPAG
 CLC 
 ADC #9
 STA USRBUF+1
 LDA #$A
 STA NSECSRW
 SEC 
 SBC #$1
 STA NUMSECS
 STA SNUM
 JSR RWPAGES
 RTS 
 DS 6
RWPAGES LDA RWTSPPTR+1
 LDY RWTSPPTR
 JSR CLLRWTS
 LDY SNUM
 DEY 
 BPL RWPAGES1
 LDY #$F
 NOP 
 NOP 
 DEC TNUM
RWPAGES1 STY SNUM
 DEC USRBUF+1
 DEC NSECSRW
 BNE RWPAGES
 RTS 

	



 ORG $B7B5

	



CLLRWTS PHP
 SEI 
 JSR RWTSENT
 BCS CLLRWTS1
 PLP 
 CLC 
 RTS 
CLLRWTS1 PLP
 SEC 
 RTS 
RWTSPRMS LDA SUBCODE
 STA USRBUF+1
 LDA #0
 STA USRBUF
 LDA VOLNUMBR
 EOR #$FF
 STA VOLEXPT
 RTS 
ZEROBUF LDA #0
 TAY 
ZEROBUF1 STA (BUFADR),Y
 INY 
 BNE ZEROBUF1
 RTS 
 HEX 00
NUMPGS HEX 1B
NSECSRW HEX 000A1B
RWTSPPTR DA $B7E8
FRSTBOOT DA $B600
IOB = *
TBLTYPE HEX 01
SNUM16 HEX 60
DNUM HEX 01
VOLEXPT HEX FF
TNUM HEX 0C
SNUM HEX 08
 DA DVCTBL
USRBUF DA $9600
BYTCNT DA $100
CMDCODE HEX 02
ERRRCODE HEX 07
VOLFND HEX FE
SLOTFND HEX 60
DRVFND HEX 01
UNUSED HEX 000000
DVCTBL HEX 01EFD800
000000
DVCTBL HEX 01EFD800