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Cores in space: The core memory module from a 1980 Spacelab computer
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1

Cores in space: The core memory module from a 1980 Spacelab computer

Hacker News·about 1 month ago
#PiUdnnGt

Spacelab was a reusable laboratory that could be carried in the Space Shuttle's cargo bay, providing lab space for astronauts and experiment...

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Reverse-engineering the vintage Intel 8087's tangent algorithm: more than CORDIC
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Reverse-engineering the vintage Intel 8087's tangent algorithm: more than CORDIC

Hacker News·10 days ago
#hy6wKaLB
#righto#fptan#cordic#microcode#article#ama

I hope you're not tired of the 8087, because I have another article about Intel's floating-point chip. 1 In 1980, Intel introduced the 8087...

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Microcode in Intel's 8087 floating-point chip: the scale instruction
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Microcode in Intel's 8087 floating-point chip: the scale instruction

Hacker News·24 days ago
#IDPViJeS

In the 1970s, floating-point arithmetic was a mess. Computer manufacturers had a dozen incompatible arithmetic standards. Moreover, floating...

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Looking inside a 1970s PROM chip that stores data in microscopic fuses
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Looking inside a 1970s PROM chip that stores data in microscopic fuses

Hacker News·2 months ago
#1BUmtyBh
#righto#chip#fuses#transistors#bits#prom

The MMI 5300 was a memory chip from the early 1970s, storing 1024 bits in tiny fuses. 1 Unlike regular RAM chips, this was a PROM ( Progra...

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Examining circuit boards from the Space Shuttle's I/O Processor
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Examining circuit boards from the Space Shuttle's I/O Processor

Hacker News·3 months ago
#JAnXK2Mj
#righto#processor#chips#network#shuttle#photo

The Space Shuttle's five 1 general-purpose computers played a critical role in each flight: controlling the engines, monitoring thousands o...

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The adder at the heart of Intel's 8087 floating-point chip
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The adder at the heart of Intel's 8087 floating-point chip

Hacker News·4 months ago
#VzCDQYBF
#righto#carry#adder#bits#block#circuitry

In 1980, Intel released the Intel 8087 floating-point coprocessor, a chip that could make math up to 100 times faster. As well as arithmetic...

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Apple didn't revolutionize power supplies; new transistors did
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Apple didn't revolutionize power supplies; new transistors did

Hacker News·4 months ago
#mxBAejEm
#righto#power#switching#supply#supplies#apple

The new biography Steve Jobs contains a remarkable claim about the power supply of the Apple II and its designer Rod Holt: [1] Instead o...

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Powering up a module from the IBM 604: an electronic calculator from 1948
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Powering up a module from the IBM 604: an electronic calculator from 1948

Hacker News·4 months ago
#fiiUp2On
#righto#tube#modules#thyratron#vacuum#current

1948 was an interesting time for computing. For decades, businesses had used punch card equipment that added and sorted electromechanically....

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Microcode inside the Intel 8087 floating-point chip: register exchange
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Microcode inside the Intel 8087 floating-point chip: register exchange

Hacker News·4 months ago
#WbgH6WyZ

In 1980, Intel introduced the 8087 floating-point chip, a co-processor that made floating-point operations up to 100 times faster. This chip...

15s
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