File:Commodore 64 250407 board main RAM U9-U12 and U21-U24.jpg
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Summary
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Detail of a Commodore 64 main board, assembly 250407 Rev. B (artwork 251137 Rev. B), showing the eight main RAM chips at U9-U12 (upper row) and U21-U24 (lower row), all OKI M3764-15RS on this board, with the 74LS257 multiplexers U13 and U25, the 7406 at U8 and the 556 timer at U20. The user port edge of the board is at the top.
Source
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Cropped from Wikimedia Commons, File:0430 - C64 Mainboard ASSY250407 RevB.jpg (retrieved 2026-10-25).
Author
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Sven.petersen, via Wikimedia Commons
Licence
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CC BY-SA 4.0. This crop is released under the same licence.
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 08:57, 25 October 2026 | | 1,308 × 744 (349 KB) | Josh (talk | contribs) | Upload for Commodore 64 RAM Replacement guide |
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