MAG TAPE CONTROLLER.

T.O. 31S5-4-308-1

TM 11-5805-663-14-13

NAVELEX 0967-464-0010

sequence is continued until al1 blocks of

address lines. T

RMR function

of a CPU data re

is placed on

data are transferred.

S address lines. When F886 16

is on the INFIBUS address lines and RITL-N

5-87. When the Block Transfer Adapter

is low, the data command word from; the

and Mag Tape Controller are used to print

stored software program on the INFIBUS

out message tapes under control of the

data lines, DBOO-N through DB15-N, is

utility print program, the address register

strobed into the I/O Controller to select the

is loaded with the TTY function address and

desired mode of operation of the CCL, RSJ,

it is not decremented after t

or RMR functions.

ten out.

5-93. PRINTER CONTROLLER (ACOC Group

5-88. MAG TAPE CONTROLLER. The

Only). The Printer Controller function re-

Tape Controller function transfers

ceives 8-bit bytes of data from the INFIBUS

data between the Formatter functio

and converts these bytes to 11-bit, ASCII

INFIBUS. When not under control of the

coded, serial words that are routed to the

Block Transfer Adapter, the Mag Tape Con-

RO TTY function. It also receives 11-bit,

troller transfers data to and from the For -

ASCII coded, serial words from the RO TTY

matter and INFIBUS, under ntrol of the

function and converts these words to 8-bit

s data is used

stored software progrom.

bytes of data that are placed on the INFIBUS.

to initialize the Formatter and notify the

The Printer Controller is a slave that gen-

CPU of the Formatter status.

erates a level 2 interrupt and is assigned

address F81X 16. There are three registers

5-89. I/O CONTROLLER. The I/O Control-

located in the Printer Controller; the data

ler function is a master which controls data

transfers between the CCL, RSJ, or RMR

ter. Each register I s assigned a separate

functions and the INFIBUS. It can also be

address which allows the stored software

addressed (slaved) by the stored software

program to write into or read from each: I reg-

program via the CPU. The I/O Controller

ister as determined by the level of RITE-N.

also determines which function has priority

The data register is assigned address

when more than one function is requesting

F818 16. The control register address is

the INFIBUS.

F816 16, and the status register is F810 16.

5-90. When the CCL or RSJ function is

requesting a direct memory access (DMA),

5 - 9 4 . If the stored software program: is to

the i/O Controller generages a DDT

clear the Printer Controller, F810 16 is

and strobes the address, data and con-

placed on the INFIBUS address lines

trol information from the function. request-

ABOO-N through AB15-N and no data is

ing the DMA to the INFIBUS.

placed on the INFIBUS data lines, DB00-N

through DB15-N, 2nd a write operation

5-91. When the CCL, RSJ, or RMR function

(RITE-N low) IS performed. This write

generates an interrupt request, the I/O Con-

operattion to the status register clears the

troller generates a level 2 interrupt as ex-

Printer Controller. T h e P r l n t c r C o n t r o l l e r

plained previously and strobes the device

then generates DONE-N which frees the

number of the function requesting the inter-

INFIBUS.

rupt to the INFIBUS data lines.

The stored software program can: also

5-95.

5-92. The I/O Controller is assigned

address F88X 16. When, address F880 16 is

read from or write into the control register,

as determined by the level of RITE-N by

on the INFIBUS address lines, ABOO-N

through AB15-N, the RSJ function is enabled

placing the control register address on the

to perform a read or write operation. The

INFIBUS address lines. After the control

CCL function is enabled when F882 16 is on

Printer Controller generates DONE-N which

the INFIBUS address lines. The RMR func-

tion is enabled when F884 is on the INFIBUS

frees the INFIBUS.

5-14