passport/src/write.a

;-------------------------------
; WriteTrackFirstPass
;
; write the contents of BASEPAGE data buffer to the selected target
; (or possibly an intermediate target, such as a RAM disk)
;
; in:    @SLOT contains (slot x 16) + $30
;        @DRIVE contains drive + $30
;        @gTrack contains track number
;        @BASEPAGE contains data to write ($1000 bytes)
;        ProDOS is in memory
; out:   if C set, write failed (A contains MLI error code)
;        if C clear, write succeeded (A is clobbered)
;        all other registers and flags clobbered
;        ProDOS is in memory
;-------------------------------
WriteTrackFirstPass
         lda   gHardDiskRef
         ora   gRAMDiskRef
         bne   +
         ; we're writing directly to a disk drive, so we
         ; reorder the data buffer so we can write the
         ; logical sectors as ProDOS blocks
         jsr   ReorderBuffer
+
         ; ProDOS 'unit number' is DSSS0000, where
         ; D is the drive number (0=drive 1, 1=drive 2) and
         ; SSS is the slot number (1-7)
         ; c.f. 'Beneath Apple ProDOS' page 6-19
         lda   DRIVE
         sec
         sbc   #$31                  ; drive number is stored as ASCII text
         lsr
         lda   #0
         ror
         sta   mliparam+1
         lda   SLOT
         asl
         asl
         asl
         asl
         ora   mliparam+1
         sta   mliparam+1            ; ProDOS unit number
         lda   #$00
         sta   mliparam+2            ; lo byte of data buffer
         lda   #$08
         sta   @blockcount           ; 8 blocks = 16 sectors
         lda   gTrack
         asl
         asl
         asl
         sta   mliparam+4            ; lo byte of block number
         rol
         and   #$01
         sta   mliparam+5            ; hi byte of block number
         lda   #BASEPAGE             ; hi byte of data buffer
         sta   mliparam+3
@writeloop
         lda   gHardDiskRef
         ora   gRAMDiskRef
         bne   +
         lda   #$81                  ; 'write block' command
         ldy   #$03                  ; parameter count
         jsr   mli
         bcs   @writeerr
-        inc   mliparam+3            ; 2 pages per block
         inc   mliparam+3
         inc   mliparam+4
         dec   @blockcount
         bne   @writeloop
         clc
         bcc   @writedone            ; always branches

+        jsr   WriteToFile
         bcc   -

@writeerr
@writedone
         php
         pha
         lda   gHardDiskRef
         ora   gRAMDiskRef
         bne   +
         jsr   ReorderBuffer
+        pla
         plp
         rts

@blockcount !byte $FF

;-------------------------------
; WriteTrackSecondPass
;
; write the contents of BASEPAGE data buffer
; from a file on a RAM disk
; to the final destination drive
;
; in:    gRAMDiskRef contains file reference number of open file on RAM disk
;        ProDOS is in memory
; out:   if C set, write failed (A contains MLI error code)
;        if C clear, write succeeded (A is clobbered)
;        all other registers and flags clobbered
;        ProDOS is in memory
;-------------------------------
WriteTrackSecondPass
         lda   gRAMDiskRef
         pha
         lda   #0
         sta   gRAMDiskRef
         jsr   WriteTrackFirstPass
         tax
         pla
         sta   gRAMDiskRef
         txa
         rts

;-------------------------------
; Create140KFile
;
; in:    @mliparam+1 points to pathname
; out:   C clear if file create+open succeeded, and A = file reference number
;        C set on error, and A = MLI error code
;-------------------------------
Create140KFile
         jsr   CreateBinFile
         bcs   @exit
         ldx   #$00
         stx   mliparam+3            ; io_buffer at address $0800
         lda   #$08
         sta   mliparam+4
         jsr   OpenFile
         bcs   @deleteAndReturn

         stx   mliparam+2            ; X=0 here
         ldx   #$30
         stx   mliparam+3
         ldx   #$02
         stx   mliparam+4            ; set file size (140KB)
         jsr   SetEOF
         bcc   @exit

         pha
         jsr   CloseFile
         pla

@deleteAndReturn
         pha                         ; save error code
         jsr   DeleteFile            ; delete file
         pla                         ; restore error code
         sec
@exit    rts

;-------------------------------
; WriteToFile - write memory to image file on RAM or hard disk
;   if RAM or hard disk is in use
; in:  called has filled @mliparam
;        with block number and write address
; out: if error, C set and A contains error code
;      if success, C clear
;      all other flags clobbered
;      all registers clobbered
;-------------------------------
WriteToFile
         lda   mliparam+2
         pha
         lda   mliparam+3
         pha

         lda   mliparam+4
         sta   @tmpparm4
         asl
         sta   mliparam+3
         lda   mliparam+5
         sta   @tmpparm5
         rol
         sta   mliparam+4
         lda   #0
         sta   mliparam+2
         lda   gHardDiskRef
         bne   +
         lda   gRAMDiskRef
+        jsr   SetMark
         tax
         pla
         sta   mliparam+3
         pla
         sta   mliparam+2
         txa
         bcs   @done
         lda   #0
         sta   mliparam+4
         lda   #2
         sta   mliparam+5
         lda   gHardDiskRef
         bne   +
         lda   gRAMDiskRef
+        jsr   WriteFile

@done
         ldx   @tmpparm4
         stx   mliparam+4
         ldx   @tmpparm5
         stx   mliparam+5
         rts

@tmpparm4 !byte 0
@tmpparm5 !byte 0