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| Forum topic | Apple Disk II dual disk controller schematics | joel_graff | 3 | 5 years 2 weeks ago |
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| Forum topic | Troubleshooting a DuoDisk unit | joel_graff | 7 | 5 years 5 months ago |
| Forum topic | Duodisk analog board troubleshooting | joel_graff | 1 | 5 years 5 months ago |
