File:PDP-5 4k by 12 bit core.jpg
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PDP-5 4k by 12 bit core.jpg
Size of this preview: 799 × 599 pixels. Other resolutions: 320 × 240 pixels | 640 × 480 pixels | 1,024 × 768 pixels | 1,333 × 1,000 pixels.
Original file (1,333 × 1,000 pixels, file size: 190 KB, MIME type: image/jpeg)
This file is from Wikimedia Commons and may be used by other projects. The description on its file description page there is shown below.
Summary
| DescriptionPDP-5 4k by 12 bit core.jpg |
English: A magnetic-core memory module from a PDP-5 computer. The module is designed to plug into the backplane of the computer, held in place by two large T-handle jackscrews, each about 1 foot (30 cm) long. This particular module was made by Electronic Memories Inc. and accepted by Digital Equipment Corp. on 9/23/1964. The individual cores inside this memory are 0.05 inches (1.27 mm) in diameter, and the memory cycle time (read plus refresh) was 4 to 6 microseconds. |
| Date | |
| Source | Own work |
| Author | Douglas W. Jones |
Licensing
I, the copyright holder of this work, hereby publish it under the following licence:
| This file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication. | |
| The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighbouring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.
http://creativecommons.org/publicdomain/zero/1.0/deed.enCC0Creative Commons Zero, Public Domain Dedicationfalsefalse |
Captions
Add a one-line explanation of what this file represents
A 4K by 12 bit core memory module from a DEC PDP-5 computer from 1964
Items portrayed in this file
depicts
some value
22 June 2021
0.03333333333333333333 second
4.7
19.5 millimetre
500
image/jpeg
194,591 byte
1,000 pixel
1,333 pixel
2ed99795345a59868907cc5e50ab3028d15697e5
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 20:30, 28 June 2021 | 1,333 × 1,000 (190 KB) | wikimediacommons>Douglas W. Jones | Uploaded own work with UploadWizard |
File usage
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Metadata
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If the file has been modified from its original state, some details may not fully reflect the modified file.
| Camera manufacturer | Panasonic |
|---|---|
| Camera model | DMC-TZ3 |
| Exposure time | 1/30 sec (0.033333333333333) |
| F Number | f/4.7 |
| ISO speed rating | 500 |
| Date and time of data generation | 13:54, 22 June 2021 |
| Lens focal length | 19.5 mm |
| Orientation | Normal |
| Horizontal resolution | 300 dpi |
| Vertical resolution | 300 dpi |
| Software used | GIMP 2.10.18 |
| File change date and time | 16:31, 25 June 2021 |
| Y and C positioning | Co-sited |
| Exposure Programme | Normal programme |
| Exif version | 2.21 |
| Date and time of digitising | 13:54, 22 June 2021 |
| Meaning of each component |
|
| Image compression mode | 4 |
| APEX exposure bias | 0.33 |
| Maximum land aperture | 3.44 APEX (f/3.29) |
| Metering mode | Pattern |
| Light source | Flash |
| Flash | Flash fired, auto mode |
| Supported Flashpix version | 1 |
| Colour space | sRGB |
| Sensing method | One-chip colour area sensor |
| File source | Digital still camera |
| Scene type | A directly photographed image |
| Custom image processing | Normal process |
| Exposure mode | Auto exposure |
| White balance | Auto white balance |
| Digital zoom ratio | 0 |
| Focal length in 35 mm film | 119 mm |
| Scene capture type | Standard |
| Scene control | High gain up |
| Contrast | Normal |
| Saturation | Normal |
| Sharpness | Normal |
| Image width | 3,072 px |
| Image height | 2,304 px |
| Unique ID of original document | xmp.did:93bf2f4e-7798-4e0d-af24-7aa736e5d825 |
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