4-71

TABLE 2. VALID N-LINE CONNECTIONS

CPU

CDP1871A SIGNAL

CPU INPUT

INSTRUCTION

CS4

CS3

CS2

CS1

CDP1800- Series Signal

MRD

N2

N0

N1

INP5

MRD

N0

N1

N2

INP3

MRD

N2

N1

N0

INP6

TABLE 3. DRIVE AND SENSE LINE KEYBOARD CONNECTIONS (NOTE 2)

SENSE

LINES

DRIVE LINES

SP

0

(

8

‘

@

H

H

PPXX

Space

6

0

8

@

NUL

h

BS

p

DLE

x

CA

N

!1

)

9

A

A

I

I

Q

Q

Y

Y

6

1

9

a

SOH

i

HT

q

DC1

y

EM

“

2

*

:

B

B

J

J

R

R

Z

Z

Line

Feed

6

2

:

b

STX

j

LF

r

DC2

z

SU

B

#

3

+

;

C

C

KKSS

{

[

Escape

6

3

;

c

ETX

k

VT

s

DC3

[

ES

C

$4

<

,

D

D

LL

T

T

|

|

\

6

4

,

d

EOT

I

FF

t

DC4

\

FS

%

5

=

-

E

E

M

M

U

U

}

]

Carriage

Return

6

5

-

e

ENQ

m

CR

u

NA

K

]GS

&6

>

.

F

F

N

N

V

V

~

↑

6

6

.

f

ACK

n

SO

v

SY

N

↑

RS

‘

7

?

/

G

G

O

O

W

W

Del

-

Delete

6

7

/

g

BEL

o

SI

W

ETB

-

US

KEY:

SHIFT (Note 1)

ALPHA (Note 1)

NORMAL

CONTROL (Note 1)

NOTES:

1. CONTROL overrides SHIFT and ALPHA

= No Response

2. Showing ASCII outputs for all combinations with and without SHIFT, ALPHA LOCK and CONTROL.

3. Drive lines 8, 9, 10 and 11 generate non-ASCII hex values which can be used for special codes.

CDP1871A, CDP1871AC