.TITLE SKELETON DRIVER HEADER
	.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  = 164660	; CSR ADDRESS - CONTROLLER 0
XX0VEC  = 340		; 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.
 
; CSR OFFSETS, BIT DEFINITIONS, AND BIT GROUP MASKS
 
SCR   = 0	; SYSTEM CONTROL REGISTER
IE    = 100	; INTERRUPT ENABLE
DONE  = 200	; I/O DONE
ERR   = 100000	; ERROR
 
CSR2  = 2	; 2ND CSR
 
CAR   = 4	; CURRENT ADDRESS REGISTER
 
BCR   = 6	; BYTE COUNT REGISTER
 
 
; OFFSETS TO DEFINE ADDITIONAL WORDS IN UCB
 
 
; MACRO TO INSERT 'BPT' INSTRUCTION FOR AUTOMATIC BREAKPOINTS
 
  .MACRO DEBUG,A1
  .IFDF XXDEBUG
  .IF GE <A1-XXDEBUG>
  BPT
  .ENDC
  .ENDC
  .ENDM
 
 
	.SBTTL
 
 
	.PAGE