W6D2. Software Computer (hardware) 1010 0110 1011 1100 1101 1111 0000 1010 0110 1010 1110 0001 Add 20,22,34.

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Presentation transcript:

W6D2

Software Computer (hardware) Add 20,22,34

W6D2 Memory Magnetic core memory

W6D2 Memory (DRAM)

W6D2 Memory (DRAM)

W6D2 Software Computer (hardware) Add 20,22,34

W6D2 Running programs Early computers: programs on perforated cards users installed tapes & cards… signup sheets!

W6D2 Running programs Things got a bit better: operator installed punch cards in batches (less time organizing, more computing time) a computer program controlled the execution of user programs (jobs) users had no direct interaction

W6D2 Running programs The PDP-1 operating system's timesharing ability made interactive access to computers economically viable by allowing various users to share the computer simultaneously. Shown here is the PDP-1 installation at BBN.

W6D2 Running programs System programs: Operating Systems User programs: Applications

W6D2 Hard disc IBM Disc Storage System (1961)

W6D2 Creating programs

W6D2 Source code

W6D2

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