Brotikasten/BROTCD01.iso/c128/c119.d64/lrr.s

Text File | 1995-08-09 | 12KB | 718 lines

;╠ITTLE ╥ED ╥EADER ═╙-─╧╙ FILE COPIER PROGRAM
;WRITTEN 92/10/03 BY ├RAIG ┬RUCE FOR ├= ╚ACKING ╬ET ═AGAZINE

.ORG $8000
.OBJ "@:LRR.BIN"

;====JUMP TABLE AND PARAMETERS INTERFACE ====

JMP INIT╨ACKAGE
JMP LOAD─IRECTORY
JMP COPY╞ILE

.BYTE $CB,131   ;IDENTIFICATION
.BYTE 0,0,0,0

ERRNO           .BUF 1    ;(LOCATION PK+15)
SOURCE─EVICE    .BUF 1
SOURCE╘YPE      .BUF 1    ;$00=1571, $FF=1581
START├LUSTER    .BUF 2
LEN═╠           .BUF 2    ;LENGTH MEDIUM AND LOW BYTES

;====GLOBAL DECLARAIONS====

KERNEL╠ISTEN = $FFB1
KERNEL╙ECOND = $FF93
KERNEL╒NLSN  = $FFAE
KERNEL┴CPTR  = $FFA2
KERNEL├IOUT  = $FFA8
KERNEL╙PINP  = $FF47
KERNEL├HKOUT = $FFC9
KERNEL├LRCHN = $FFCC
KERNEL├HROUT = $FFD2

ST = $D0
CIA├LOCK = $DD00
CIA╞LAGS = $DC0D
CIA─ATA  = $DC0C

CLUSTER┬LOCK├OUNT .BUF 1        ;1 OR 2
FAT┬LOCKS         .BUF 1        ;UP TO 3
ROOT─IR┬LOCKS     .BUF 1        ;UP TO 8
ROOT─IR┼NTRIES    .BUF 1        ;UP TO 128
TOTAL╙ECTORS      .BUF 2        ;UP TO 1440
FIRST╞ILE┬LOCK    .BUF 1
FIRST╥OOT─IR┬LOCK .BUF 1
FILE├LUSTER├OUNT  .BUF 2

BUF├YLINDER     .BUF 1
BUF╙IDE         .BUF 1
FORMAT╨ARMS     .BUF 6

;====HARDWARE LEVEL====

SEND╒0 = *  ;( .┴=BURST├OMMAND├ODE ) : .├╙=ERR
   PHA
   LDA #0
   STA ST
   LDA SOURCE─EVICE
   JSR KERNEL╠ISTEN
   LDA #$6F
   JSR KERNEL╙ECOND
   LDA #"U"
   JSR KERNEL├IOUT
   BIT ST
   BMI SEND╒0┼RROR
   LDA #"0"
   JSR KERNEL├IOUT
   PLA
   JSR KERNEL├IOUT
   BIT ST
   BMI SEND╒0┼RROR
   CLC
   RTS

   SEND╒0┼RROR = *
   LDA #5
   STA ERRNO
   SEC
   RTS

TOGGLE├LOCK = *
   LDA CIA├LOCK
   EOR #$10
   STA CIA├LOCK
   RTS

SERIAL╫AIT = *
   LDA #$08
-  BIT CIA╞LAGS
   BEQ -
   RTS

GET┬URST┬YTE = *
   JSR SERIAL╫AIT
   LDX CIA─ATA
   JSR TOGGLE├LOCK
   TXA
   RTS

MOUNT─ISK = *  ;() : .├╙=ERR
   LDA #%00011010
   JSR SEND╒0
   BCC +
   RTS
+  JSR KERNEL╒NLSN
   BIT ST
   BMI SEND╒0┼RROR
   CLC
   JSR KERNEL╙PINP
   BIT CIA╞LAGS
   JSR TOGGLE├LOCK
   JSR GET┬URST┬YTE
   STA ERRNO
   AND #$0F
   CMP #2
   BCS MOUNT┼XIT
   LDY #0
-  JSR GET┬URST┬YTE
   STA FORMAT╨ARMS,Y
   INY
   CPY #6
   BCC -
   CLC
   ;** SET INTERLEAVE
   LDA #%00001000
   JSR SEND╒0
   BCC +
   RTS
+  LDA #1            ;INTERLEAVE OF 1 FOR 1581
   BIT SOURCE╘YPE
   BMI +
   LDA #4            ;INTERLEAVE OF 4 FOR 1571
+  JSR KERNEL├IOUT
   JSR KERNEL╒NLSN
   MOUNT┼XIT = *
   RTS

BUFPTR = 2
SECNUM = 4

READ╘RACK = *  ;( .┴=CYLINDER, .╪=SIDE ) : TRACKBUF, .├╙=ERR
   PHA
   TXA
   AND #$01
   ASL
   ASL
   ASL
   ASL
   BIT SOURCE╘YPE
   BPL +
   EOR #$10
+  JSR SEND╒0
   BCC +
   RTS
+  PLA                  ;CYLINDER NUMBER
   JSR KERNEL├IOUT
   LDA #1               ;START SECTOR NUMBER
   JSR KERNEL├IOUT
   LDA #9               ;SECTOR COUNT
   JSR KERNEL├IOUT
   JSR KERNEL╒NLSN
   SEI
   CLC
   JSR KERNEL╙PINP
   BIT CIA╞LAGS
   JSR TOGGLE├LOCK
   LDA #<TRACKBUF
   LDY #>TRACKBUF
   STA BUFPTR
   STY BUFPTR+1
   LDA #0
   STA SECNUM
-  BIT SOURCE╘YPE
   BMI +
   JSR GET1571┬UF╨TR
+  JSR READ╙ECTOR
   BCS TRACK┼XIT
   INC SECNUM
   LDA SECNUM
   CMP #9
   BCC -
   CLC
   TRACK┼XIT = *
   CLI
   RTS

GET1571┬UF╨TR = *
   LDA #<TRACKBUF
   STA BUFPTR
   LDX SECNUM
   CLC
   LDA #>TRACKBUF
   ADC BUFPTR1571,X
   STA BUFPTR+1
   RTS

BUFPTR1571 = *
   .BYTE 0,8,16,6,14,4,12,2,10

READ╙ECTOR = *  ;( BUFPTR ) : .├╙=ERR
   JSR GET┬URST┬YTE
   STA ERRNO
   AND #$0F
   CMP #2
   BCC +
   RTS
+  LDX #2
   LDY #0

   READ┬YTE = *
   LDA #$08
-  BIT CIA╞LAGS
   BEQ -
   LDA CIA├LOCK
   EOR #$10
   STA CIA├LOCK
   LDA CIA─ATA
   STA (BUFPTR),Y
   INY
   BNE READ┬YTE
   INC BUFPTR+1
   DEX
   BNE READ┬YTE
   RTS

;====LOGICAL SECTOR LEVEL====

INIT╨ACKAGE = *
   LDA #$0E
   STA $FF00
   LDA #$FF
   STA BUF├YLINDER
   STA BUF╙IDE
   CLC
   RTS

SECTOR╙AVE = 5

READ┬LOCK = *  ;( .┴=CYLINDER,.╪=SIDE,.┘=SECTOR ) : .┴┘=BLK╨TR,.├╙=ERR
   CMP BUF├YLINDER
   BNE READ┬LOCK╨HYSICAL
   CPX BUF╙IDE
   BNE READ┬LOCK╨HYSICAL
   DEY
   TYA
   ASL
   CLC
   ADC #>TRACKBUF
   TAY
   LDA #<TRACKBUF
   CLC
   RTS

   READ┬LOCK╨HYSICAL = *
   STA BUF├YLINDER
   STX BUF╙IDE
   STY SECTOR╙AVE
   JSR READ╘RACK
   BCC READ┬LOCK╨HYSICAL╧K
   LDA ERRNO
   AND #$0F
   CMP #11    ;DISK CHANGE
   BEQ +
   SEC
   RTS
+  JSR MOUNT─ISK
   LDA BUF├YLINDER
   LDX BUF╙IDE
   LDY SECTOR╙AVE
   BCC READ┬LOCK╨HYSICAL
   RTS

   READ┬LOCK╨HYSICAL╧K = *
   LDA BUF├YLINDER
   LDX BUF╙IDE
   LDY SECTOR╙AVE
   JMP READ┬LOCK

DIVIDE┬Y18 = *  ;( .┴┘=NUMBER ) : .┴=QUOTIENT, .┘=REMAINDER
   ;** COULD REPEATEDLY SUBTRACT 360 HERE
   LDX #$FF
-  INX
   SEC
   SBC #18
   BCS -
   DEY
   BPL -
   CLC
   ADC #18
   INY
   TAY
   TXA
   RTS

CONVERT╠OGICAL┬LOCK╬UM = *  ;( .┴┘=BLOCK╬UM ) : .┴=CYL, .╪=SIDE, .┘=SEC
   JSR DIVIDE┬Y18
   LDX #0
   CPY #9
   BCC +
   PHA
   TYA
   SBC #9
   TAY
   PLA
   LDX #1
+  INY
   RTS

DEST╨TR = 6
CUR├YLINDER = 8
CUR╙IDE = 9
CUR╙ECTOR = 10
BLOCK├OUNTDOWN = 11
SOURCE╨TR = 12

COPY┬LOCKS = *  ;( .┴┘=START┬LOCK, .╪=BLOCK├OUNT, ($6)=DEST ) : .├╙=ERR
   STX BLOCK├OUNTDOWN
   JSR CONVERT╠OGICAL┬LOCK╬UM
   STA CUR├YLINDER
   STX CUR╙IDE
   STY CUR╙ECTOR

   COPY┬LOCK╠OOP = *
   LDA CUR├YLINDER
   LDX CUR╙IDE
   LDY CUR╙ECTOR
   JSR READ┬LOCK
   BCC +
   RTS
+  STA SOURCE╨TR
   STY SOURCE╨TR+1
   LDX #2
   LDY #0
-  LDA (SOURCE╨TR),Y
   STA (DEST╨TR),Y
   INY
   LDA (SOURCE╨TR),Y
   STA (DEST╨TR),Y
   INY
   BNE -
   INC SOURCE╨TR+1
   INC DEST╨TR+1
   DEX
   BNE -
   INC CUR╙ECTOR
   LDA CUR╙ECTOR
   CMP #10
   BCC +
   LDA #1
   STA CUR╙ECTOR
   INC CUR╙IDE
   LDA CUR╙IDE
   CMP #2
   BCC +
   LDA #0
   STA CUR╙IDE
   INC CUR├YLINDER
+  DEC BLOCK├OUNTDOWN
   BNE COPY┬LOCK╠OOP
   CLC
   RTS

READ├LUSTER = *  ;( .┴┘=CLUSTER╬UMBER ) : CLUSTER┬UF, .├╙=ERR
   ;** CONVERT CLUSTER NUMBER TO LOGICAL BLOCK NUMBER
   SEC
   SBC #2
   BCS +
   DEY
+  LDX CLUSTER┬LOCK├OUNT
   CPX #1
   BEQ +
   ASL
   STY 7
   ROL 7
   LDY 7
+  CLC
   ADC FIRST╞ILE┬LOCK
   BCC +
   INY

   ;** READ LOGICAL BLOCKS COMPRISING CLUSTER
+  LDX #<CLUSTER┬UF
   STX 6
   LDX #>CLUSTER┬UF
   STX 7
   LDX CLUSTER┬LOCK├OUNT
   JMP COPY┬LOCKS

;====═╙-─╧╙ FORMAT LEVEL====

BOOT┬LOCK = 2

LOAD─IRECTORY = *  ;( ) : .┴┘=DIRBUF, .╪=DIR┼NTRIES, .├╙=ERR
   LDA #$0E
   STA $FF00

   ;** GET PARAMETERS FROM BOOT SECTOR
   LDA #0
   LDY #0
   JSR CONVERT╠OGICAL┬LOCK╬UM
   JSR READ┬LOCK
   BCC +
   RTS
+  STA BOOT┬LOCK
   STY BOOT┬LOCK+1
   LDY #13              ;GET CLUSTER SIZE
   LDA (BOOT┬LOCK),Y
   STA CLUSTER┬LOCK├OUNT
   CMP #3
   BCC +

   INVALID╨ARMS = *
   LDA #60
   STA ERRNO
   SEC
   RTS

+  LDY #16              ;CHECK ╞┴╘ REPLICATION COUNT, MUST BE 2
   LDA (BOOT┬LOCK),Y
   CMP #2
   BNE INVALID╨ARMS
   LDY #22              ;GET ╞┴╘ SIZE IN SECTORS
   LDA (BOOT┬LOCK),Y
   STA FAT┬LOCKS
   CMP #4
   BCS INVALID╨ARMS
   LDY #17              ;GET DIRECTORY SIZE
   LDA (BOOT┬LOCK),Y
   STA ROOT─IR┼NTRIES
   CMP #129
   BCS INVALID╨ARMS
   LSR
   LSR
   LSR
   LSR
   STA ROOT─IR┬LOCKS
   LDY #19              ;GET TOTAL SECTOR COUNT
   LDA (BOOT┬LOCK),Y
   STA TOTAL╙ECTORS
   INY
   LDA (BOOT┬LOCK),Y
   STA TOTAL╙ECTORS+1
   LDY #24              ;CHECK SECTORS PER TRACK, MUST BE 9
   LDA (BOOT┬LOCK),Y
   CMP #9
   BNE INVALID╨ARMS
   LDY #26
   LDA (BOOT┬LOCK),Y
   CMP #2               ;CHECK NUMBER OF SIDES, MUST BE 2
   BNE INVALID╨ARMS
   LDY #14              ;CHECK NUMBER OF BOOT SECTORS, MUST BE 1
   LDA (BOOT┬LOCK),Y
   CMP #1
   BNE INVALID╨ARMS

   ;** GET DERIVED PARAMETERS
   LDA FAT┬LOCKS        ;FIRST ROOT DIRECTORY SECTOR
   ASL
   CLC
   ADC #1
   STA FIRST╥OOT─IR┬LOCK
   CLC                  ;FIRST FILE SECTOR
   ADC ROOT─IR┬LOCKS
   STA FIRST╞ILE┬LOCK
   LDA TOTAL╙ECTORS     ;NUMBER OF FILE CLUSTERS
   LDY TOTAL╙ECTORS+1
   SEC
   SBC FIRST╞ILE┬LOCK
   BCS +
   DEY
+  STA FILE├LUSTER├OUNT
   STY FILE├LUSTER├OUNT+1
   LDA CLUSTER┬LOCK├OUNT
   CMP #2
   BNE +
   LSR FILE├LUSTER├OUNT+1
   ROR FILE├LUSTER├OUNT

   ;** LOAD ╞┴╘
+  LDA #<FATBUF
   LDY #>FATBUF
   STA 6
   STY 7
   LDA #1
   LDY #0
   LDX FAT┬LOCKS
   JSR COPY┬LOCKS
   BCC +
   RTS

   ;** LOAD ACTUAL DIRECTORY
+  LDA #<DIRBUF
   LDY #>DIRBUF
   STA 6
   STY 7
   LDA FIRST╥OOT─IR┬LOCK
   LDY #0
   LDX ROOT─IR┬LOCKS
   JSR COPY┬LOCKS
   BCC +
   RTS
+  LDA #<DIRBUF
   LDY #>DIRBUF
   LDX ROOT─IR┼NTRIES
   CLC
   RTS

ENTRY┴DDR = 2
ENTRY╫ORK = 4
ENTRY┬ITS = 5