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From: ARMS1493@SNYPLAVA.BITNET
Newsgroups: comp.sys.apple2
Subject: RE: Need DOS 3.3 RWTS help
Message-ID: <9005051933.AA25646@apple.com>
Date: 5 May 90 20:23:00 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 43

RWTS Parameters  (IOB)


     +-------+-----------+-----------------------+-----------------------+
 +00 |  $01  | (slot)*16 |          Drive        |       Volume #        |
     +-------+-----------+-----------------------------------------------+
 +04 | Track | Sector    | Address of DCR (Device Characteristics Table) |
     +-------+-----------+-----------------------------------------------+
 +08 | Addr of Buffer    |        Not Used       |          $00          |
     +-------------------+-----------------------+-----------------------+
 +0C |  CC   |   RC      |  Previous Volume      |   Previous Slot       |
     +-------------------------------------------------------------------|
 +10 |  Previous Drive   |
     +-------------------+


CC: Command Code

   $00 - Seek
   $01 - Read
   $02 - Write
   $03 - Format

RC:  Return Code
   $00 - No Errors
   $08 - Formatting Error
   $10 - Write Protected
   $20 - Vol Mismatch
   $40 - Drive Error
   $80 - Read Error





Device Characteristics Table
      (DCR)



     +--------------+----------------+---------------------+
 +00 |   Type $00   |   Phases  $01  |   Motor On  $EFD8   |
     +--------------+----------------+---------------------+