GE 235 System Manual page 48

I N P U T / O U T P U T T Y P E W R I T E R
The GE-235 Input/~utput Typewriter can transmit input data to the Central Processor from the key-
board while simultaneously printing the data. Communication with the Central Processor during
both input and output operations is through the N register. All input and output operations a r e
programmed single-character (BCD) operations. Output is at the rate of 15 characters p e r second.
The typewriter keyboard has 44datakeys, a space bar and standard functional control keys. Type-
writer characters include:
ALPHABETICS A THROUGH Z
NUMERIC DIGITS 0 THROUGH 9
SPECIAL CHARACTERS AS FOLLOWS:
Functions that can be programmed are:
Space
Carriage Return
Tabulation
Print Red
Print Black
Ignore
Index
Console And Typewriter Instructions
Mnemonic Operand Index Time
Oper. Code Address Word Microsec.
-
Description
RCS
TON
TYP
KON
12 READ CONTROL SWITCHES, Each of the 20 console
control switches for register A a r e examined. If a
switch i s down (ON), a 1 bit
is
placed in the corre-
sponding position of A.
12 TYPEWRITER ON. The typewriter is logically con-
nected to the N register.
12
TYPE. If the typewriter is ON, one BCD character in
the N register is typed.
12 KEYBOARD ON. The typewriter input keyboard is
activated. Striking of a key will load the corresponding
BCD character into the N register.