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Production files for revision 1.8 with all the latest corrections, copper fill isolation of JP1 and JP9 so JP1 can be scratched through now to switch to 8K rom-space. Modified transistor footprints for easier soldering, corrected non plated hole (drill holes) placement, corrected USB connector placement, corrected logic families (now only HC logic) , corrected crystal footprint now suitable for PTH and SMT crystals (use paper isolation for PTH crystals!) clock inverter using one half of U18 to solve the no white characters in black squares problem when using slow (EE)PROMS. corrected orientation of keyboard data lines (5-pins) header.

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mahjongg2

2022-07-26 15:45:54 +02:00

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