Workspaces: Disk operations workspace 2

       Name: Disk operations workspace 2                             [Show more]
       Type: Workspace
    Address: $25D6 to $287B
   Category: Workspaces
    Summary: Variables used by the disk operations and DOS 3.3 RWTS routines
    Context: See this workspace in context in the source code
 References: No direct references to this workspace in this source file


 ORG $25D6

.buffer

 SKIP 48                ; A 256-byte sector buffer, where we can load sectors
                        ; from the disk, such as the track/sector list, or the
                        ; commander file contents
                        ;
                        ; For file data, this is where we store the data that
                        ; we want to save, before it is pre-nibblized into
                        ; 6-bit nibbles in buff2 by the prenib routine
                        ;
                        ; It is also where file data is stored after being
                        ; post-nibblized, in which case the 6-bit nibbles in
                        ; buffr2 are converted into 8-bit bytes and stored here
                        ;
                        ; [Show more]
                        ;
                        ; This variable is used by the following:
                        ;
                        ;   * CopyTrackSector
                        ;   * gettsl
                        ;   * LoadFile
                        ;   * pstnib
                        ;   * rentry
                        ;
                        ; This list only includes code that refers to the
                        ; variable by name; there may be other references to
                        ; this memory location that don't use this label, and
                        ; these will not be mentioned above

.fretrk

 SKIP 1                 ; The number of the last track that we checked for a
                        ; free sector in the getsct routine
                        ;
                        ; [Show more]
                        ;
                        ; This variable is used by the following:
                        ;
                        ;   * getsct
                        ;
                        ; This list only includes code that refers to the
                        ; variable by name; there may be other references to
                        ; this memory location that don't use this label, and
                        ; these will not be mentioned above

.dirtrk

 SKIP 3                 ; The direction in which we are searching tracks for
                        ; free sectors in the getsct routine (+1 or -1)
                        ;
                        ; [Show more]
                        ;
                        ; This variable is used by the following:
                        ;
                        ;   * getsct
                        ;
                        ; This list only includes code that refers to the
                        ; variable by name; there may be other references to
                        ; this memory location that don't use this label, and
                        ; these will not be mentioned above

.tracks

 SKIP 1                 ; The number of tracks per disk
                        ;
                        ; [Show more]
                        ;
                        ; This variable is used by the following:
                        ;
                        ;   * getsct
                        ;
                        ; This list only includes code that refers to the
                        ; variable by name; there may be other references to
                        ; this memory location that don't use this label, and
                        ; these will not be mentioned above

 SKIP 3                 ; Padding to ensure the bitmap variable lines up with
                        ; byte #56 ($38) for the bitmap of free sectors

.bitmap

 SKIP 200               ; Bit map of free sectors in track 0, at byte #56 ($38)
                        ; in the buffer
                        ;
                        ; [Show more]
                        ;
                        ; This variable is used by the following:
                        ;
                        ;   * getsct
                        ;
                        ; This list only includes code that refers to the
                        ; variable by name; there may be other references to
                        ; this memory location that don't use this label, and
                        ; these will not be mentioned above

 SKIP 72                ; These bytes appear to be unused

.buffr2

 SKIP 350               ; A 342-byte buffer for storing data in the 6-bit nibble
                        ; format
                        ;
                        ; This is where we load file data from the disk in the
                        ; 6-bit nibble format, so it can be post-nibblized into
                        ; 8-bit bytes and stored in buffer
                        ;
                        ; It is also where we store nibblized data that is ready
                        ; to be saved to the disk
                        ;
                        ; [Show more]
                        ;
                        ; This variable is used by the following:
                        ;
                        ;   * pstnib
                        ;   * read
                        ;
                        ; This list only includes code that refers to the
                        ; variable by name; there may be other references to
                        ; this memory location that don't use this label, and
                        ; these will not be mentioned above

 PRINT "Disk operations workspace 2 from ", ~buffer, "to ", ~P%-1, "inclusive"