/       P?S/8 RX01 NON-SYSTEM HANDLER     PAL8-VB0  08-APR-87 PAGE 1

   1                 /       P?S/8 RX01 NON-SYSTEM HANDLER
   2   
   3                 /       LAST EDIT:      17-DEC-1986     23:00:00        CJL
   4   
   5                 /       MAY BE ASSEMBLED WITH '/J' SWITCH SET.
   6   
   7                 /       P?S/8 NON-SYSTEM HANDLER FOR SINGLE-DENSITY 8" FLOPPY DISKS ON VARIOUS
   8                 /       HARDWARE CONFIGURATIONS:
   9   
  10                 /       A)      RX01 AND COMPATIBLES (DSD-210, ETC.).
  11   
  12                 /       B)      RX02 WITH SINGLE-DENSITY DISKS AND COMPATIBLES (ALSO RX03).
  13   
  14                 /       C)      ANY OF THE ABOVE ON VT78, VT278 (DECMATE I), PC278 (DECMATE II).
  15   
  16                 /       SUPPORTS DOUBLE-SIDED DISKS ON RX03.
  17   
  18                 /       SUPPORTS SECONDARY DRIVES (UNITS 2 AND 3) ON VT78/VT278/PC278 AND DSD-210.
  19   
  20                 /       USES DEC OS/8 COMPATIBLE (12-BIT MODE) SINGLE-DENSITY DISK FORMAT FOR
  21                 /       FILE CONVERSION, ETC. COMPATIBILITY.
  22   
  23                 /       CALLING SEQUENCE:
  24   
  25                 /       CDF     MYFLD           /SET CALLER'S DATA FIELD
  26                 /       CIF     HNDFLD          /SET HANDLER'S INSTRUCTION FIELD
  27                 /       JMS I   (RXAHND)        /CALL THE HANDLER
  28                 /       PARAM                   /PARAMETER POINTER
  29                 /       ERRORRETURN             /RETURNS HERE WITH STATUS IN AC
  30                 /       GOODRETURN              /RETURNS HERE WITH CLEAR AC IF I/O OK
  31   
  32                 /       PARAMETER LIST BREAKDOWN:
  33   
  34                 /       PARAM=  .               /PARAMETER LIST HERE
  35   
  36                 /       ADDRESS                 /TRANSFER ADDRESS
  37                 /       FUNCTION                /FUNCTION WORD
  38                 /       BLOCK                   /LOGICAL BLOCK FOR TRANSFER
  39   
  40                 /       FUNCTION WORD BREAKDOWN:
  41   
  42                 /       BIT[0]:         READ IF 0, WRITE IF 1
  43                 /       BITS[1-5]:      PAGE COUNT, 40 IF 0
  44                 /       BITS[6-8]:      TRANSFER FIELD
  45                 /       BITS[9-11]:     LOGICAL UNIT
  46   
  47                 /       BIT[9] IS IGNORED ON ALL SYSTEMS.
  48   
  49                 /       BIT[10] IS IGNORED ON ALL SYSTEMS WITH ONLY 1-2 DRIVES.

/       P?S/8 RX01 NON-SYSTEM HANDLER     PAL8-VB0  08-APR-87 PAGE 2

  50           0200          PAGE                    /START ON A NEW PAGE
  51   
  52           0200          HERE=   .               /WHERE WE ARE NOW
  53   
  54                 /       DEFINITIONS.
  55   
  56           7326          NL0002= CLA CLL CML RTL /LOAD AC WITH 0002
  57           7346          NL7775= CLA CLL CMA RTL /LOAD AC WITH 7775
  58           7240          NL7777= CLA CMA         /LOAD AC WITH 7777
  59           0006          REVISIO="F&77           /REVISION OF HANDLER
  60           1734          RXLENGT=114^32%2        /LENGTH OF RX01 (ONE SIDE)
  61   
  62                 /       RX8B DEFINITIONS.
  63   
  64           6750          DEVCODE=75^10+6000      /SKELETON IOT CODE OF DISK
  65   
  66           6750          SEL=    DEVCODE+0       /LOAD DRIVE PAIR PER AC[11]
  67           6751          LCD=    DEVCODE+1       /LOAD COMMAND REGISTER
  68           6752          XDR=    DEVCODE+2       /TRANSFER DATA REGISTER
  69           6753          STR=    DEVCODE+3       /SKIP ON, CLEAR TRANSFER FLAG
  70           6754          SER=    DEVCODE+4       /SKIP ON, CLEAR ERROR FLAG
  71           6755          SDN=    DEVCODE+5       /SKIP ON, CLEAR DONE FLAG
  72           6756          INTR=   DEVCODE+6       /INTERRUPT ENABLE/DISABLE PER AC[11]
  73           6757          INIT=   DEVCODE+7       /INITIALIZE CONTROLLER, RECALIBRATE DRIVES
  74   
  75                 /       DEVICE HANDLER HEADER BLOCK.
  76   
  77           0122          *"R&177;*"X&177;*"A&177 /GROUP NAME
  78           0130
  79           0101
  80           7777          *-1                     /GROUP COUNT
  81           0122          *"R&177;*"X&177;*"A&177 /DEVICE NAME
  82           0130
  83           0101
  84           0000          *RXAHND&177             /ENTRY POINT
  85           1733          *RXLENGTH-1             /HIGHEST BLOCK
  86           0006          *REVISION               /REVISION OF HANDLER