File:Radio Shack TRS-80 Model 4 CPU board 8709296 (Shelby Jueden).jpg
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Summary
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The CPU board of a non-gate-array TRS-80 Model 4 in its case. The silkscreen reads "TANDY CORP. MADE IN U.S.A. © 1982" and "8709296 REV C 1700219"; Tandy's 1983 technical reference manual lists bare board 8709296 in CPU assembly 8858090. The Z80A is at U57 and the three ROMs at U68-U70; the sixteen 4164 RAM positions fill the right-hand side, and some wire modifications are visible.
Source
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Wikimedia Commons: File:TRS-80 Model 4 Mainboard.jpg (retrieved 2026-10-21), downscaled to 1920 px wide.
Author
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Shelby Jueden
Licence
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Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0), as stated on Wikimedia Commons.
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 19:14, 21 October 2026 | | 1,920 × 1,440 (1.02 MB) | Josh (talk | contribs) | TRS-80 Model 4 CPU board photo from Wikimedia Commons (CC BY-SA 4.0) |
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