DEC VT220 Technical Manual page 215

ADDRESS 17C3H (WRj
o
i
06 05 04 03 02
01
00
,BAD7 HI .. 4 1 - - - - - - - - - - - - - - - - - - -.... IBAOO H)
BIT VALUES
BIT 0-7
xx
BINARY DEFINITION OF NUMBER OF CHARACTER
TIMES IN HORIZONTAL SYNC WIDTH
Figure C-l7 9007 VPAC: Horizontal Sync
width Register
ADDRESS 17C4H (WRj
07 06 05 04 03 02 01 00
IBAD7 HI.. 4 1 - - - - - - - - - - - - - - - - - - -.... (BADO HI
BiT VALUES
BIT 0-7
xx
BINARY DEFINiTION OF NUMBER OF
HORIZONTAL PERIODS IN THE VERTICAL SYNC
WIDTH
Figure C-18 9007 VPAC: vertical Sync
Width Register
ADDRESS
07
06
17CSH (WRj
05 04 03 02 01 00
IBAD7 HI ..
41------------------_.....
,BADO HI
BiT VALUES
BiT 0-7
xx
BINARy DEFINITION OF NUMBER OF
HORIZONTAL PERIODS. MINUS ONE. FROM
LEADiNG EDGE OF VERT SYNC l TO LEADING
EDGE OF VLT H ,FOR THE FIRST SCAN LINE OF
FIRST DATA ROW)
Figure C-l9 9007 VPAC: Vertical Sync
Delay Register
C-12