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Added dedicated CSYNC sheet to try and consolidate sync processing. |
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Introduced missing LK3 and IC14 unit supplying the RGB sync pin, together with |
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Added tag snapshot-2023-01-24 for changeset 5616c5b75dcd |
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Added decoupling capacitors and missing power units. |
snapshot-2023-01-24 |
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Added documentation, copyright and licensing information. |
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Amended a note about clock signal buffering. |
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Added decoupling capacitors for RAM chips and tidied the layout somewhat. |
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Moved the modified 4164 back into the DRAM library, also moving TM4164EA4. |
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Added alternative TM4164EA4 RAM module. Changed RAM outputs to tri-state. |
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Removed keyswitch symbol, now present in the keyboard project instead. |
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Moved the keyboard matrix circuit into a separate project. |
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Added component numbering for the keyboard matrix. |
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Added a sheet with the keyboard matrix circuit. |
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Added capacitor properties, various NTSC elements plus workarounds. |
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Added diode for electrical rules check compliance. |
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Changed the NMI signal buffering to match the circuit diagram, on the advice of |
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Added some footprint libraries and fixed symbol library path. |
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Automatic update to the schematic by KiCad itself. |
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Fixed bus naming and added power flags to placate KiCad. |
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Fixed various pin types. |
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Annotation added numerals to A and SPKR component labels/references. |
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Fixed various labels/references. |
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Added missing variable capacitor to the PAL video clock circuit. |
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Added PL4 and IC17 labels plus notes. |
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The Acorn Electron mainboard, recorded from published schematics. |
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