DEC VT220 - 9007 VPAC: Characters Per Data Row Register

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ADDRESS 17C1 H (WR)

07

06

05 04 03

02

01

00

(BAD7 HI

..

4t-------------------

....

(BADO HI

BIT VALUES

BIT

0-7

4FH

OR

B3H

BINARY DEFINITiON

OF

NUMBER

OF

CHARACTER

TIMES

PER

DATA

ROW

LESS

ONE

14FH

FOR

BO

COLUMN,

OR

B3H

FOR

132

COLUMNI,

NOTE

THIS REGISTER VALUE SUBTRACTED FROM

CHARACTERS

PER

HORIZONTAL

RETRACE

REGISTER VALUE DEFINES CHARACTER TIMES

IN HORIZONTAL

RETRACE

PERIOD

Figure

C-15

9007

VPAC:

Characters

Per

Data

Row

Register

ADDRESS

07

06

,

7C2H

(WR)

05 04

03

02

01

00

(BAD7 HI ....

t--------------------l

.....

(BADO HI

BIT VALUES

BIT

0-7

xx

BINARY DEFINITION

OF

NUMBER

OF

CHARACTER

TIMES FROM LEADING

EDGE

OF

HORIZ SYNC L

TO

LEADING

EDGE

OF

VL

T

H,

Figure

C-16

9007

VPAC:

Horizontal

Sync

Delay

Register

C-ll

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