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morice 8 septembre 2012 11:40
morice

La mémoire de l’OBC de Gemini était de 4096 mots de 39 bits ce qui est assimillé à une mémoire de 8 kilo-octets et non de 4 méga-octets.



ah excellent !! 8 ko.... en torres de ferrite !!! la navette utilisera le même procédé encore ! 

c’est bien ça, n’est-ce-pas ?

http://history.nasa.gov/computers/Ch1-2.html

The ferrite core memory in the Gemini computer had a unique design. It consisted of 39 planes of 64 by 64-bit arrays, resulting in 4,096 addresses, each containing 39 bits. A word was considered to be 39 bits in length, but it was divided into three syllables of 13 bits. The memory itself divided into 18 sectors. Therefore, it was necessary to specify sector and syllable to make a complete address. Instructions used 13 bits of the word with data representations of 26 bits. Data words were always stored in syllables 0 and I of a full word, but instructions could be in any syllable. This means that up to three instructions could be placed in any full word, but only one data item could be in a full wor
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