opt -l
*
*   Hardware equates for Western Digital WX1 and WX2 controllers
*
*   Revised 4/21/88
*

*  Disk Controller Addresses
HDDATA equ $FF50    ;read or write data here
HDSTAT equ $FF51    ;read status here
HDCONF equ $FF52    ;read parallel input lines here

HDRSET equ $FF51    ;write here to reset controller
HDATTN equ $FF52    ;write here to get controller's attention
HDMASK equ $FF53    ;write here to control DMA and IRQ (both off)

*  Command op-codes
WX$TST  equ     0       ;Test drive ready
WX$TK0  equ     1       ;Recalibrate to track 0
WX$STS  equ     3       ;Status of last operation
WX$FMT  equ     4       ;Format drive
WX$VFY  equ     5       ;Verify sectors
WX$FTK  equ     6       ;Format track
WX$FBT  equ     7       ;Format bad track
WX$RDD  equ     8       ;Read sector(s)
WX$WRT  equ     $0A     ;Write sector(s)
WX$SIK  equ     $0B     ;Seek
WX$INI  equ     $0C     ;Initialize drive parameters
WX$ECC  equ     $0D     ;Read ECC burst length
WX$RBF  equ     $0E     ;Read sector buffer
WX$WBF  equ     $0F     ;Write sector buffer

WX$SBD  equ     $E0     ;Sector buffer diagnostic
WX$DRD  equ     $E3     ;Drive diagnostic
WX$CTD  equ     $E4     ;Controller diagnostic

WX$RDL  equ     $E5     ;Read long
WX$WRL  equ     $E6     ;Write long

*   Bogus "special init" command

WX$XIN  equ     $FF     ;Init w/ special parameters

*   Error codes
WE$AOK  equ     $00     ;No error
WE$NSC  equ     $02     ;"Seek complete" not received
WE$WRF  equ     $03     ;Write fault
WE$NRD  equ     $04     ;Drive not ready
WE$NT0  equ     $06     ;Track 0 not found
WE$DSS  equ     $08     ;Drive still seeking
WE$UER  equ     $11     ;Uncorrectable data error
WE$DAM  equ     $12     ;Data address mark not found
WE$SIK  equ     $15     ;Seek error
WE$CER  equ     $18     ;Correctable data error occured
WE$BTK  equ     $19     ;Track is flagged as bad
WE$CMD  equ     $20     ;Invalid command
WE$ISA  equ     $21     ;Illegal sector address
WE$SBF  equ     $30     ;Sector buffer diagnostic failed
WE$ROM  equ     $31     ;Controller ROM checksum error
WE$ECC  equ     $32     ;ECC polynomial hardware failure

    opt l