IBM RAMAC 305 Reference Manual

The

information

programmer

(Form

No.

information

RAMAC®305 REFERENCE SUMMARY

contained

and

operator.

A26-3502).

is

required.

in

this

It

is

Reference

summary

condensed

should

is from

be

intended

the

made

IBM

to

as

that

an

aid

RAMAC

manual

for

305

the

more

Reference

when

experienced

more

complete

Manual

International

RAMAC 305

Business

Machines

Corporation

Systems

Summary

305

PROCESS

305

PROCES DRUM

Additional printer Additional processing tracks: U / . # Paper Tape Input track: $

Accumulator

Add Subtract Read out and reset

Read out Multiplicand Multiplier Input

Track

Output

Track

(Standard Machine) Disk Memory Address Register Character Selector Inquiry Track Magnetic Core Punch

Output

Printer

Output

(Special Feature)

Paper Tape

(Special Feature)

VALID

Unit

Track

Input

output

TRACK

track: T

* Invalid Address

DRUM

TRACKS

ADDRESSES

FROM

M

L

V

*

K

S R99

*

Q

-99 S

T

$

TO

L

M

V99 N99

K

S R99

J

-99 Q

1299

S

T

$

COMPARING

The

following chart illustrates both valid and invalid track

addresses for compare, field compare, and combined compare.

* Yes, if

NOTE:

During

pare selectors affected.

TO

= V99 and

field compare,

MULTIPLICA

Basic

Rules

of

Multiplication

Maximum number digits in multiplier cannot exceed

Maximum number digits in multiplicand cannot exceed Maximum number digits in product cannot exceed 20. Product

is

developed in accumulators 0 and

Location

Units position of product plier, minus number of positions to be dropped from product.

of

Product

EXCEPTIONS

NO.

of CHAR. = 00

TO

address determines field com-

TION

1.

is

8 plus number of digits in multi-

11

9.

* One low-order position of the product will be lost for each

digit in the multiplier beyond

Instruction Explanation

1.

Position multiplicand on multiplicand track. xxxV99zz xxx - Track and units position of multiplicand.

2.

Execute automatic multiplication. yyyN99zz

Half

Adjustment

The

position to half-adjust can be determined by using the following formula: (09)

-(

half -ad just. NOTE:

automatic multiplication.

zz -Number

yyy

- Track and units position of multiplier.

zz -Number

the number of decimals to be dropped = position to

Accumulators 0 and 1 should be reset prior to initiating

11.

of digits in multiplicand.

of digits in multiplier.

*.

INVALID

M to R

R to J

TRANSFER

J to Any Track

INSTRUCTIONS

Speed

The

following formula may be used to compute the time re-

quired for multiplication (includes 30 ms for loading multi-

plicand).

60 +

10

(n

-

1)=

time

in

n

= number of multiplier digits.

milliseconds.

REFERENCE

SUMMARY

3

AUTOMATIC DIVISION

Basic

Rules

of

Division

Maximum number digits in dividend cannot exceed 19. Maximum number digits in divisor cannot exceed Maximum number digits in quotient cannot exceed 19. Maximum number digits' in divisor plus maximum number digits in quotient cannot exceed

20.

9.

OPERATING

370 Printer Output

80 positions 60 positions 40 positions 20 positions

Punch Output Card Feed Input Typewriter Output

Automatic Typing Manual Typing (average) Tabulations (average) Carriage Returns (average)

(29 (36.5 (50

(84 ( 100 (125

SPEEDS

LPM) LPM) LPM) LPM)

CPM

max.)

CPM max.)

100 200 300

1000

2050

ms/line

1640

ms/line

1200

ms/line

720

ms/line 600 ms/card 4so

ms/card

ms/

character

ms/

character ms/tab ms/

return

Location

Units position of quotient is in 119.

Location

Units position of remainder in L08 minus number of digits in

excess of of digits in divisor.)

Instruction

1. Position dividend in accumulators 0 and

xxxLyyzzb5 xxx - Track and units position of dividend.

2.

Position divisor on multiplicand track.

xxxV99yy

3. Execute automatic division. L09P99xx xx - Twice the number of digits in quotient.

Half

Increase the number

(3) read quotient from position L18. Remainder is also positioned one position to the left.

sion.) NOTE:

mum whole number figures.

of Quotient

of

Remainder

11.

(Number

Explanation

yy

zz -Number

xxx-

yy -Number

Adjustment

above, add 5 to

If

number

of digits in remainder equal number

1.

- Maximum whole number digits tient plus 8. (Cannot exceed 19.) Maximum whole number digits in quotient is maximum digits in dividend minus minimum digits in divisor plus one.

Track and units position of divisor.

added zeros.) quotient exceeds to right of divisor equal to number in excess of instruction.

of

digits, then additional digits are decimal

of digits in dividend.

of digits in divisor. (Including

If

number of digits of

11, zeros must be added

11

before execution

digits in quotient by one

119

after execution of instruction, and

(Do

not exceed basic rules

digits in quotient desired exceeds maxi-

in

instruction

in

of

quo-

this

divi-

Speed

The

following formula may be used to compute the quired for division (includes plus

30 ms for loading divisor).

100 + 20 n

(n -1)

= number

= time in milliseconds.

of

quotient digits.

30 ms for positioning dividend

time

re-

Disk

Storage

Seek time disk to disk:

SOo

ms/

Seek time track to track, same disk:

250

ms/max

Seek time record-to-record, same track:

50

ms

Transfer disk

so

ms/max.

Transfer drum to disk:

130 ms/max. 105 ms/avg. 80

Other Operating

Track-to-track transfer Control panel test additional 20

Record advance additional 30

Skip-to-record additional Addressing Address Register additional 20 Cycle Delay additional 30

NOTE: tions which normally require pleted in

Features of the RAMAC 305 are summarized below. feature, the table indicates the number standard machine, the units in which each optional addition may be made and the maximum available capacity.

305

FEATURES Character selectors Distributors Selectors 10

323

FEATURES Co-Selectors Pilot Selectors 0 Digit

Selector 1

Offset Stacker

DPBC

positions 20

FEATURES

370

Co-Selectors Pilot Selectors Skip Stops

*One 4S-position character selector standard.

**5-position

t2-position

Timing

max. 600

to

drum track:

ms/

175 ms/avg. 100 ms/min.

55

ms/avg. 30 ms/min.

Speeds

on

If

Program Exit Overlap

30 ms.

FEATURE

Standard

Standard Increment

Standard

avg. 400

drum

50

ms for execution may be com-

ms/

min.

ms/min.

is

installed, certain instruc-

SUMMARY

of

units included in the

Increment

3*

100

()

0

4** 0 6

3

20

,10

4**

5t

1

10

Increment

4** 5t

5

30

For

each

Maximum

6

120

40

Maximum

20**

lOt

2 1

80

Maximum

12**

lOt

11

ms ms ms ms ms ms

4 IBM RAMAC

305

DIGIT

NO

DIGIT

1

2

3

4

5

6

7

8 9

11 12

CONSOLE READING AID

ZONES

CHAR

0

x

•

• •

•

• •

•

• •

•

• •

•

X

•

0

-

&

0

A

J

/

1

B

K

S

2

c

L

T

3

D

M

U

4 E

N

V

5

F

0

W

6

G

p

X

7

H

Q

y

8

I

R

Z

9

$

#

I!

*

%

@

CONSOLE

The

Console

(

On

Left)

operator

decipher instruction easi

Iy. It should

following

I.

of

2.

3.

4.

In

the

following

and 4 lights

XOl248

..

Because

the

zone

lights

chart

should condition. X

and

0 in followed sented,

which

READING AID

Reading

is

designed

the

lights

more be

manner:

Mentally

arrive

the

numeric

For

example:

1 2 4 8

0.00 .0.0

•••

oooe

Refer

to

the

digit

which

this

sum.

Find

the

proper

opposite

this

Follow

across

letter,

or

represented

example;

are

glowing:

~

6

numeric

opposite

be

checked

The

matching

this

example}

across

to

the

in

this

{left

special

Aid

to

help

binory

quickly

used in

at

the

lights

0

chart

for

corresponds

hand

zone

digit.

to

the

character

by

these

the

lights

total

the

digit 6 on

for a

zone

should

character

case

is

the

coded

and

the

sum

glowing.

the

column}

lights

number,

lights.

X,

6,

matching

pattern

then

repre-

the

to

0,

the

letter

the

READ,

The

the test lock

2,

The

the Test Lock

WRITE,

AND

ALTER

SUMMARY

following diagrams show the sequence of operations

On

or

Off.

Test

Lock

On

1st

~

2nd

~

3rd

I Write I

TesT

Lock

Off

1st

B

2nd

8

3rd

I Write I

TEST

following is a resume

ON

and

LOCK

with

it

to

On

From

To

Parity

From

Q

On

From

Q

To

From

To

[;J

FUNCTIONS

of

console keyboard operations

OFF.

with

Test Lock

Make disk file inquiries during processing

when

{an

be

F.

Make disk file inquiries Make

drum

Make

track inquiries during processing

drum

track inquiries when Alter a record in the disk storage file Alter a

drum

track record

Read from Correct parity errors

drum

track

________________________________________________

not processing

not

________________________________________

"M"

(clear

____________

________ ________

processing

____

____________________

Yes

accumulators) Yes

ON

OFF

No

Yes

No

Yes

No

yes

No

Yes

No No

No

Yes

NOTE:

Dual

Access

Select

Hubs,

accept

only

RAMAC

during

an

NOTE: Any inquiries directed to the disk storage file

processing will be replied to only as provided for in the program.

CYCLE

exit

Cycles

cycle

CHART

Timing

Chart

Delay

DELAY

Regenerated Impulses Emit.Used to

Return Stored Prog or

Select Access

Arm

EXI

T

REFERENCE

to

during

SUMMARY

5

Console

Operating

START-STOP

PROCEDURES

\

Starting the Machine After a Power-Off

1.

Depress sole

2. Depress Hold

3. and

4. Depress by

5.

Place of

6.

Place reader

7.

If

Load depress

Restarting the Same Job

To

restart

press

the

Starting or Stopping

To

Start:

1. Set step.

Set

2. operation-RUN,

3. Depress

4. Depress

To

Stop:

1.

Set step.

2. Set

Inquiries-File

When

1.

The

2.

3.

Depress

4. Key

Inquiries-File

ITI0ff:

I.

Test Control

2.

3.

Depress Inquire

4.

5. Key

ITI0n:

I.

The

2.

The

3.

Depress

Condition

the

lights

the

punch

the

Ready

any

the

program.

the

operation.

the

hopper.

a

new

program

button.

the

reader

the

Program

the

Control

the Program

the

Program

the

Control

Not

Test machine

the

in

the

Lock

Selector the light

in

the

Test Control

the

Power-on

have

printer

Control

desired

If

reader

same

start

Program

key

turned

Start

light

the

key.

Selector switches

Selector switch to SINGLE

Start.

Selector switches

Selector

at

on,

depress

Start

key.

key

down

is

on.

Impulse

Selector

data

is

job,

switch

or

program

to

be

loaded,

program

Start

key.

place

at

a Specific Program Step

OPERATION,

Set key.

switch

INQUIRIES

Information

Processing

Lock

must

be

must

desired

Information During Processing

must

desired

comes

record

Lock

must

Selector switch

desired

off.

be

reset-depress

Format

five-digit address.

be

off.

switch

should

Format

key.

on

immediately.

address.

be

off.

Format

key.

Procedures

the

console.

until

buttons

is

already

cards

to

key.

be

should

After

the

Reset

cards

that

to

the

desired

load

depress

in

the

desired

the

desired

etc.

the

desired

CONTROL

Reset.

set

to

RUN.

be

set

cards

the

feed

to

key.

stop

are

the

machine,

STOP.

RUN.

the

con-

feeding

required

mode

in

the

Program

and

de-

program

mode

program

of

4.

When

the

IN

will

Delay

the

program

hub,

Inquiry

quiry program uous

When

5. address.

Inquiries-Drum

When

Not

1.

The

Test

The

Control

2.

3. Depress

4.

Depress

Processing

Lock

the the

ALTERATIONS

Altering Part on

a Drum Track

I.

The

Test

Lock

2.

Depress Select

3. character

Depress

4.

Duplicate

5. by

tion

6.

Type

7. Depress completed.

8.

Depress

9.

tion

holding

to

the

type

be

the

proper

key.

the

down

changed.

new

the

the any

reaches

the

Inquiry

stop.

(The

and

Exit

cycles.)

light

Cycle

turns

Information

may

be

either

Selector Read desired

switch

key

(read

character

TO

of

the Information

must

be

on.

Read

key.

track

by

Alter

key

to

on

the

track

information.

Clear

Write desired

place

Q track.

information

the

DUP

key

after

key.

track

key.

key

the

step

light

will

lights

on,

on

or

is set

on

to

"Q")

key

on

DRUM

depressing

the

keyboard

on

Duplicate

all

alterations

except

which

turn

will

show

key

in

the

off.

RUN.

.

the

keyboard.

TRACKS

the

corresponding

the

typewriter

up

R.

tests

on

and

five-digit

in a condi-

to

the

have

Altering a Complete Drum Track

I.

The

Test

Lock

must

be

on.

2.

Clear

the ing this

3.

Depress

tion

Type

4.

5.

Depress

6.

Depress Select

7. character

Q track.

the

Read

order.

the

to

type

the

the the

the

key.

TESTING

key,

Alter

on

desired

Clear Write

desired

This

may

Space

to

place

Q track.

if

typing

by

depressing

be

bar,

the

key

the

information.

key

key.

track

PROCEDURES

accomplished

and

the

keyboard

less

than

100

the

corresponding

by

depress-

Clear

in a condi-

characters.

Testing Typewriter Control Panel Formats

1.

Inquiry a. b. c. d. e.

format Depress Turn Depress

Key

in Depress of

operation

the

Reset

selector

appropriate

desired

Program

on

the

key. control

switch

Format

file address.

Start

key

typewriter

to

key (1,

one

time

control

FORMAT

2,

or

for

each

panel

program.

the

Inthe

contin-

track

posi-

been

key

TEST.

3) .

cycle

in

6 IBM RAMAC 305

2.

Document-printing a.

Reset The

Turn

Depress

of

operation

the

test

the

b.

c.

d.

process

record

Selector

Program

on

format

must

the

Program Testing

Method I executes a program,

2

executes

stopping.

1.

2.

3.

4.

5.

6.

7.

NOTE:

during

write

File

several

program

The

Test

Lock

The

File

not

is

impossible

the

to

the program

Interlock

be

plugged.

program

the

first

control

should it

Turn spond place

Place

through a normal

After

the

gram,

TION.

When

will

If

it and corresponding

onto

light

processing

turn

the

Program

perform

the

operator

is necessary

then

type

Because

this

procedure,

the

disk

will

glow.

one

only

character

the

should

switch

to

destroy

selector

program

selector

load

program

Control

Start

program

wishes

to

out

the

File

each

storage,

Operation

unit.

be

on

Control

Start

typewriter

one

steps

or a complete

METHOD

be

1

off.

on

By

leaving

a file

switches

that

on

cards

in

load

unit

has

Selector

key is

step

to

examine a track

depress

desired

key.

Interlock

time

the

machine

may

the

switch

key

one control

step

the

process

this

record.

is

CONTROL

the

machine, routine.

stopped

switch

depressed,

at a time.

the

Keyboard

track

switch the

program

be

resumed

typewriter

to

FORMAT

time

for

panel

at a time;

routine

control

switch

so

that

to

be

executed,

STOP.

on

the

to

SINGLE

by

depressing

is

not

jack-plugged

will

stop

track.

TEST.

each

cycle

program.

method

before

panel

unplugged,

they

corre-

and

proceed

first

OPERA-

the

machine

at

any

time,

Read

attempts

and

by

depress-

and

pro-

key,

the

to

ing

the

Check

Test File

is

impossible

the

step

this

have

Because

this

onto

will

Reset

program

Start.

Reset

program

Lock

Interlock

not

be

the

program

to

the control

processing

first

routine,

of

the

point,

been

This

may

Read

key the

procedure,

the

disk

glow.

key,

to.

the

Program

1.

The

2.

The should it

3.

Turn spond place

4.

After of first

5.

At that order. board

NOTE:

during write File

light

the

Check

the

Track Clearing

Clearing a track

can

be

accomplished

1.

Turn

the

Test

2.

Depress track. tracks propriate

To

reset

Read

The Q track

(e.g.,

track

character

the

accumulator

key,

setting

step,

should

switch

plugged.

to

destroy

selector

first

program

selector

second

the

operator

affected

be

accomplished

and

File

each

storage,

Operation

setting

step,

to

blanks

by

using

Lock

and

Space. can

W)

the

depressing

METHOD

be

off.

on

By

leaving

a file

switches

on

unit

has

place

the

routine.

to

determine

selecting

Interlock

time

the

may

the

program

depressing

or

the

on.

This

now

by

depressing

key

(W

track,

program

Program

2

the

process

this

record.

that

is

to

CONTROL

stopped

program

can

investigate

by

the

proper

switch

the

program

machine

be

resumed

Program

accumulator

console

writes

be

used

in

this

depress

selector

Set,

control

switch

so

that

be

executed,

STOP.

on

the

selector

if

everything

depressing

track.

is

not

will

stop

by

selector

Set,

track

keyboard

blanks

to

blank

Write

case) .

Read

and

switches

and

then

panel

unplugged,

they

corre-

and

initial

step

on

the

tracks

is

the

Key-

jackplugged

attempts

and

the

depressing

switches

and

then

to

zero

as follows:

on

the

out

other

and

the

ap-

M.

in

to

Q

REFERENCE

SUMMARY

7

Error Correction Procedures

PROCESSING

Parity

Console Indication:

Cause:

Restart

cycle,

the

Clock

Console Indication:

Cause:

Restart Procedure:

Check

1.

Processing Parity

2.

Improper

PTOcedure:

1.

If

the

machine on. depressing possible and

2.

If

the chine Check sary

tion accumulator data used necessary

struction

If

an

indication

To

correct

providing following a.

Depress

b.

Read

100 contains

c.

After

key. page

d.

Type

e.

Depress

been

f.

Depress

g.

3.

If

the

will

Reset a

read-in

tion

core

the comparing tion sible,

step

tion

Error

I.

Processing CLOCK

2.

Some

phase

1.

Make NOTE:

light

character

parity

The

operator

because

the

records

parity

will

Reset unless is

involved.

is

retained

as

an

so

error

an

procedure

the

characters

the

This

and

any

completed.

parity

stop

and

has

occurred,

unit.

core

unit.

and

the

where

can

be

ligh t on.

a.

note

The

stops

on.

Check

stop

and

an

aid

to

that

persists

that

an

the

an

full will

stop

the

the program

check

with

Program

to

an

Depress

the the program

the

started

Stop

Stops

of

console

Stop

(Red

transfer

check

occurred

will

stop

may

Reset

no

information

in

the

check

occurred

with

the

Program

accumulator

If

read-out

has

been

in

the

to

reconstruction.

restart

the

accumulation

on a track

the

source

invalid

accumulator

may

Check

track

that

on

the

error,

it track cause

under

corrections

clear

write

key.

start.

occurred

the

TO

Start

accumulator

transferred

Check

It

may

accumulator

source

record.

should

accumulator

over

(Red

machine

of

the

program

may

character

Reset

key

CYCLE

be

timing

ERRORS

Stop

light

within

on

with

the

INSTRUCTION

attempt

and

then

machine

FROM

reset

will has

the

Stop

has

have

on

the

CYCLE

Start

may

read-out

and

to

zero.

magnetic-core

program

to

data

is

occurring

operation

be

used:

key.

contains

track

are

be

automatically

been

typed,

typewriter

the

first

invalid

that

are

after

the

on

the

light

is

all

that

is

involved.

data

Reset

and

possible

data However,

be

restarted

is

reset

again.

light

is

out

step

not

indicate

on)

.

the

processing

the

INSTRUCTION

the

transfer

Program

actually

not

FROM

light

be

all

and

reset

has

The

unit

It

will

at

some

can

be

track

transfer,

incorrect.

is

the

parity

typed,

depress

to

character.

required.

last

TO

cycle,

on.

Depressing

is

necessary

If

is

in

make

to

correct

with

the

if

at

and

on)

.

of

step.

involved.

the

CYCLE

Start.

transferred

been CYCLE, on.

Depressing

that reset occurred,

accumulator

and normally previous

built

on

not

and

if

underlined.

space

correction

the

an

the

an

the

core

this

some

the

error,

unit.

cycle,

light

again

This

affected.

the

ma-

is neces-

instruc-

can

up

again.

it

is

the

FROM

involved,

error.

the

track

the

alter

across

machine

Check unless

accumula-

magnetic-

inquiry

error

informa-

is

not

pos-

until

by

is

the

be be

in-

an

All

the

has

of

by

the

following must dicated

2.

Depress

3.

Investigate and written

4.

If

tions, program mulation

5.

Investigate cuted duplicated. punch a card,

Set

6. and

Start

7.

File

Check

include

preceding

either

it

to

the

press

the

program

and

the

Reset

the

in

the

or

both

may

where

can

the

insure

For

Program

program

Stop

Console Indication:

1.

Processing File

2.

Check

Stops

light

Cause:

Record

just

data

on

NOTE:

and

will

the

process

on

every

Restart

1.

Depress

2.

Depress

3.

If

typing that the re-entered at storage.

Feed

stored

drum.

Accumulator

always

panel

file

write

Procedure:

Check Program

the

error

out

is

the

source

error

condition

on

an

instruction

Check

cause a File

persists,

the

Stop

Console Indication:

1.

Processing

2.

Feed

Check

Stops

light

Cause:

Misfeed leave should

Restart

1.

2.

3.

4.

5.

6.

Read

in

and

arrive

affect

Procedure:

Depress

Remove Remove Run

out

Process

Runout

Restart

by

card

failed

unit)

in

processed.

Depress

Check

the

only

Reader

the any

the

placing

to

front

the

Stop

Console Indication:

1.

Processing

2.

Read

Stops

Check

step.

at

also

program

wrong

be

begin

etc.

are

operation.

Reset.

the

card at

one

cards

jammed

remaining

feed

Reader

light

Therefore,

least

the

preceding

key,

not

TO

address

place.

of

these necessary the

accumulator

again.

program

that

information

example, a slide

Selector

set.

by

depressing

(Red

Stop

on.

on

disk

read-out

not

wired, a File

Start.

the

disk

storage

of

the

has

drum

that

will

(Red

Light

on.

reader. A check

each

feed

card

that

Stop.

from

cards

key.

the

last

from

of

the

remaining

Start

(Red

Stop

on.

step

on

step.

the

Check

track

step

to

steps

are

to

restart

steps

which

to

start

light

file

does

and

reset

Check

stop.

information

record

being

been

corrected,

track

and

transfer

on)

station.

has

not

the

feed

from

cards

by

three

the

feed

key

to

light

the

restart

which

Reset.

of

both

be

sure

accumulator at a position

is

reset

are

will

not

operation,

at

the

Program

on)

.

not

agree

to

the

If

the

Check

can

and

the

transferred.

the

program

the

.

is

made

Therefore,

been

hopper.

the

feed.

depressing

cards

(two

hopper

cards

run

the

on)

.

procedure

the

error

the

error

data

was

and

the

to

be

re-exe-

be

lost

feed a card,

restart

Start.

with

file is

invalid

FILE

hubs

stop

will

be

retained drum

data

can

restarted

record

to

as

the

any

processed.

the

cards

into

the

that

are

cards

in.

is

in-

step

not

opera-

in

the

accu-

or

point,

source

on

occur

by

track

After

be

disk

cards

jam

Non-

if

the

feed

to

be

8 IBM RAMAC

305

IBM RAMAC 305 Reference Manual

Specifications and Main Features

Frequently Asked Questions

User Manual