SAPO

Also called SAmočinný POčítač.Designed by doc. Antonín Svoboda.It was manufactured from 1957 (Opening of works 1953) by Ústav matematických strojů.

Parts of this topic may be machine translated.

The first Czechoslovak digital computer was SAPO, which was based on relay technology, because at that time other suitable parts were not available in Czechoslovakia. The computer worked until 1961, when it was destroyed by a fire of one relay block. The input and output of the information was provided by punching labels. The magnetic drum unit (constructed by Václav Chlouba) with a capacity of 1024 words was used as memory.

Architecture

The computer architecture was binary using a moving comma, the length of the word was 32 bits and the instructions had five addresses. The first two addresses were addresses of the operands. The third address was designed for the result and the last two addresses were indicators for further instruction according to the result sign. The speed of all instructions was the same and was approximately 3 operations per second (OP/s).

Error resistance

Due to the low reliability of approximately 7,000 relays and 400 vacuum tubes, a triple modular redundancy was chosen when designing a computer. The correct result was ensured by the vote of the majority. This procedure was removed by any individual error, provided the computer was properly programmed. It was the first computer -resistant computer.

A poem about a constructor of mathematical machines

Ivo Štuka, at the end of the city, Prague 1958, Mladá fronta

(A poem composed in honor of doc. Antonín Svoboda)

We went together on a steamer first,

you photographed seagulls, smoke and sun,

that spills the surface like a ax,

By water colors you have painted water a hundred times

and a cloud above the coast,

in which the Castilian ridge of the palm stuck.

You also juchal in the pool and diver

For the colorful charm below,

as if the heart was a similar balloon,

to burst filled, tricolor

and hiding back and forth.

And rarely I saw you over the block and pencil,

You changed into a blacksmith and anvil in the brain

She burned your face as sparks fly,

the heart was a penny again

and you got the weight of the weight very beautifully

re -found,

When digits and formulas were crazy about paper

And they talked to you the least three -color.

All those events are secondary to this poem,

For I saw you again in Prague

in the middle of your machines that count at a pace,

to which an avalanche of electricity is rolling in the wires,

in the middle of your friends dream,

who shouted from the block back then,

Even if the sea was rejoiced and more seductive

than the harem of naked nymphs.

Those your machines can calculate

elusive waves that pass through the matter,

perhaps even the shift of gray rain wagons

In the Square Station of the Autumn Heaven,

they count the pension of the hearingful grandmothers,

they don't even know the hum of the sea

Neither the roar of electric shocks

in the jerseys of this artificial brain,

they count satellite tracks

and all we can think of,

and between them your heart as a inflated light ball

It swings into the bar and is not heard in Hluk.

However, your machine cannot calculate,

Why does the heart at other times become more difficult as the clod of metal,

Why are you sad when looking at the circling sheet,

to the girl's legs, flexibly paddling elsewhere,

Why do your head sometimes fall into your hands

and you'd rather pose it

and let lying, a nasty stoin,

When you slash with a ladder of your formulas and formulas,

It won't count your machine.

It can only a poem,

And that's why I write it to you three -color

and I put in an envelope

and I entrust, as always, the papermakers

circling leaves.

References

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