DEC VT220 - Page 221

ADDRESS
ADDRESS
ADDRESS
ADDRESS
07
17D8H (WR. VERTICAL)
17D9H (WR, HORiZONTAL)
17F8H (RD, VERTICAL)
17F9H (RD, HORIZONTAL)
06 05 04 03 02
01
00
(BAD7 H; ..... ------------------ ... (BADO HI
BIT VALUES
BIT 0-7
xx
BINARY DEFINITION OF DATA ROW (VERTICAL
CURSOR REGISTER) OR COLUMN NUMBER
(HORIZONTAL CURSOR REGISTER) OF THE
CURSOR
Figure C-3r3
913137 VPAC: Vertical/Horizontal
Cursor Registers
ADDRESS 17FAH (RD)
0
7
06
05
04
03
02
01 00
INTR VERT
(NOT USED)
FRAME
FLAG RETRACE
TIMER
I I I
IBAD7 HI ...... ~--------------,---- ..... (BADO HJ
BIT VALUES
BIT 7
0
1
BIT 6
0
BIT 1-5
BIT 0
0
1
Figure C-31
NO OTHER STATUS BIT SET
OTHER STATUS BIT SET.
NO VERTiCAL RETRACE IN PROGRESS
VERTICAL RETRACE IN PROGRESS
NOT USED
FINAL TABLE ADDRESS NOT READ.
FINAL TABLE ADDRESS READ
913137 VPAC: Status Register
C-l8