;
;	This file defines data structures referenced by SSDRIVER.
;
	STRUCT	SSUCB
;
	F	,B,132				; Skip over standard UCB
	F	ERROR_AST_RMOD,B		; Access mode of error AST
	F	,B				; State byte
	V	<				; Define state bits
		ERROR_ENABLED,,,M		; Error interrupts enabled
		>
	F	ERROR_AST_ADDRESS,A		; Address of error AST routine
	L	LENGTH				; Length of extended UCB
	E
;
;	Define standard VMS buffered I/O packet.
;
	STRUCT	BUF
;
	F	DATA_ADDRESS,A			; Pointer to data area
	F	USER_BUFFER,A			; Pointer to P0 user buffer address
	F	SIZE,W				; Size of block
	F	TYPE,B				; Type of block
	F	,B				; Unused byte
	L	HDRSIZ				; Length of header
	F	DATA_AREA,B			; Start of data area
	E