BLOCK TRANSFER ADAPTER

T.O. 31S5-4-308-l

TM 11-5805-663-14-13

NAVELEX 0967-464-0010

baud. Data is transferred between the

Memory will operate in the clear/write or

TTY Controller and INFIBUS as a parallel

read/restore mode.

8-bit byte, and between the TTY Controller

and TTY Function serially on a single data

5-757. AUTOLOAD (80331150-000) (see

input line and a single data output line.

figure 120). The Autoload (AlA3A9) con-

There are three addressable registers in

tains three unique types of IC's (type

the TTY controller, data (8 bits), control

SN7496, SN74100, and SN74157N). The

(6 bits), and status (4 bits). The data

applicable paragraph describing these

unique IC's are listed in table 5-1. The

to be transferred. The control register

Autoload contains a fixed, stored execu-

specifies the current operation commands

tive program that is used to reload the

and the status register stores the TTY

Core Memory in the event the program is

Controller and TTY Function status.

lost. The Autoload is initiated by the

autoload pulse (ATLD) which is generated

5-760. MODEM CONTROLLER 1 (80331210-

by the Program Maintenance Panel when

000) (see figure 123). The Modem Con-

the autoload, atld, switch is touched, at

troller 1 (AlA3A12) contains seven unique

power recovery, or power turn on if

types of IC's (type SN7493A, SN74150P,

enabled by PRAL. PRAL is asserted by a

SN74153N, SN74163N, SN74175

switch located behind the Program Mainte-

SN74197N, and SN74198N). The applicable

nance Panel. It allows autoload to occur

paragraph describing these unique IC's

automatically at power turn on or power

are listed in table 5-l. Modem Con-

recovery.

troller 1 provides asynchronous interface

between the Processor INFIBUS and VF

5-758. PARALLEL I/O (80331180-000) (see

Comm Link 1. It operates in the byte

figure 121). The Parallel I/O (AlA3AlO)

mode with a data rate of 1200 baud. Data

contains five unique types of IC's (type

is transferred between Modem Controller 1

SN74153N, SN74157N, SN74174N,

and INFIBUS as a parallel 8-bit byte and

N8202N, and N8203N). The applicable

between the Modem Controller 1 and VF

paragraph describing these unique IC's

Comm Link 1 serially on a single data

are listed in table 5-l. The Parallel I/O

input line and a single data output line.

provides interface between the Processor

There are three addressable registers in

INFIBUS and the Alarm Control and VF

Modem Controller 1; data (8 bits),

Comm Link function, providing parallel

control (6 bits), and status (4 bits). The

input and output data lines. Operating in

data register receives and contains the

the slave mode only, the Parallel I/O

data to be transferred. The control

recognizes its register addresses on the

INFIBUS and receives or transmits data to

or from one of its three registers; data

commands and the status register stores

(16 bits), status (12 bits) and control

Modem Controller 1 and VF Comm Link I

(6 bits).

status.

5-759. TTY CONTROLLER (80331140-000)

5-761. BLOCK TRANSFER ADAPTER

(see figure 122). The TTY Controller

(80331120-000) (see figure 124). The

(AlA3A11) contains seven unique types of

Block Transfer Adapter (AlA3A13) contains

IC's (type SN7493A, SN74150P, SN74153N

four unique types of IC's (type SN74153N,

5N74163N, SN74175N, SN74197N and

SN74157N, SN74163N, SN74191). The

SN74198N). The applicable paragraph

applicable paragraph describing these

describing these unique IC's are listed

unique IC's are listed in table 5-1. The

in table 5-1. The TTY Controller provides

Block Transfer Adapter controls the Mag

asynchronous interface between the

Tape Controller which transfer blocks of

Processor INFIBUS and the ASR TTY Func-

data directly to and from the Processor

iron in the Switch Group on KSR TTY

and Mag Tape units. Operating in the

Function in the ACOC Group. It operates

slave mode it receives initiating control

in the byte mode with a data rate of 110

words or transmits status information when

5-123