           ttl     SCSI Equates for the WIREWRAP KLUDGE BOARD
*
*   SCSI bit and byte definitions
*
RST        equ     2
SEL        equ     4
BSY        equ     8
MSG        equ     16
CD         equ     32
IO         equ     64
REQ        equ     128
HIGH       equ     $FF                 HIGH for open collector A side
LOW        equ     0
*
*   VIA Declarations
*
VIA        equ     $E8A0               VIA on SBC-2
DATA       equ     1+VIA               SCSI data bus
STATUS     equ     0+VIA               SCSI status lines
VIAPCR     equ     12+VIA
IFR        equ     13+VIA
IER        equ     14+VIA
DDRDATA    equ     3+VIA               SCSI data bus direction reg
DDRSTAT    equ     2+VIA               SCSI status bits direction reg
STATDDB    equ     %00000111           PB7 is REQ (input)
*                                      PB6 is IO (input)
*                                      PB5 is CD (input)
*                                      PB4 is MSG (input)
*                                      PB3 is BSY (input)
*                                      PB2 is SEL (output)
*                                      PB1 is RST (output)
*                                      PB0 is LATCH CLOCK (output)
