.NLIST
	.SBTTL SYMBOL DEFINITIONS AND ASSEMBLY OPTIONS
 
; XXDF.MAC
;
; SYMBOL DEFINITIONS FOR SKELETON DEVICE DRIVER
 
	.MCALL	HWDDF$,UCBDF$
	HWDDF$
	UCBDF$
 
LD$XX   = 0		; THIS DRIVER IS LOADABLE
X$$X11  = 1		; THERE IS ONE CONTROLLER
MAXUNIT = 2.		; NO. OF UNITS ON CONTROLLER
XXPRI   = PR5		; PRIORITY
XX0CSR  = 0		; CSR ADDRESS - CONTROLLER 0
XX0VEC  = 0		; INTERRUPT VECTOR - CONTROLLER 0
 
XXDEBUG  = 1		; DEBUG FLAG (GETS BPT'S INSERTED AT STRATEGIC PLACES)
			; VALUE IS DEBUGGING LEVEL:
			;	1 = INCLUDE ALL BREAKPOINTS
			;	2 = BREAKPOINT ONLY AT POWER FAIL ENTRY
			; IF COMMENTED OUT, NO BREAKPOINTS ARE SET.
 
;
; BIT DEFINITIONS
;
;
; BIT NAME DEFINITIONS
; FIELD DEFINITIONS
;
BIT0 = 1
BIT1 = 2
BIT2 = 4
BIT3 = 10
BIT4 = 20
BIT5 = 40
BIT6 = 100
BIT7 = 200
BIT8 = 400
BIT9 = 1000
BIT10 = 2000
BIT11 = 4000
BIT12 = 10000
BIT13 = 20000
BIT14 = 40000
BIT15 = 100000
HIBYTE= 177400
LOBYTE= 000377

; CSR OFFSETS, BIT DEFINITIONS, AND BIT GROUP MASKS
 
CSR0  = 0	; SYSTEM CONTROL REGISTER
IE    = 100	; INTERRUPT ENABLE
DONE  = 200	; I/O DONE
ERR   = 100000	; ERROR
 
; OFFSETS TO DEFINE ADDITIONAL WORDS IN UCB

UCBXTRA = 0	; NO. OF EXTRA WORDS TO APPEND TO UCB
 
; MACRO TO INSERT AUTOMATIC BREAKPOINTS
; INSERTS A 'BPT' IF XDT IS INSTALLED, ELSE USES A 'HALT'
 
  .MACRO DEBUG,A1
  .IFDF XXDEBUG
    .IF GE <A1-XXDEBUG>
      .IF DF X$$DBT		; IF WE GOT XDT IN THERE
        BPT
      .IFF
        HALT
      .ENDC
    .ENDC
  .ENDC
  .ENDM

  .SBTTL
  .LIST
 
 
	.PAGE