File:ZX81+35 REV 3.0.pdf
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ZX81+35_REV_3.0.pdf (file size: 68 KB, MIME type: application/pdf)
first version of non prototype ZX81+35
File history
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| Date/Time | Dimensions | User | Comment | |
|---|---|---|---|---|
| current | 01:59, 3 April 2016 | (68 KB) | Mahjongg (talk | contribs) | Changed R59 to 10K (from 4K7) for better stability with cassette interface pulses that contain a lot of odd harmonics, which would otherwise randomly "split" the pulse in two digital pulses. |
| 19:23, 28 March 2016 | (68 KB) | Mahjongg (talk | contribs) | changed 10uF cap in cassette interface to 4n7 | |
| 16:49, 27 March 2016 | (68 KB) | Mahjongg (talk | contribs) | Implemented working cassette input interface | |
| 02:22, 23 March 2016 | (68 KB) | Mahjongg (talk | contribs) | Changed the cassette port (first attempt) | |
| 04:04, 20 March 2016 | (68 KB) | Mahjongg (talk | contribs) | Changed 2N7002 FETs in joystick interface to MMBT3904 NPN Transistors, source gate capacitance FETs had negative influence on keyboard timing | |
| 23:17, 19 March 2016 | (68 KB) | Mahjongg (talk | contribs) | Inverted clock of U18b. | |
| 23:02, 13 March 2016 | (68 KB) | Mahjongg (talk | contribs) | first version of non prototype ZX81+35 |
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