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8-bit acorn hardware • Re: Shimmering Teletext on BBC/Master

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For the Master, I need to replace IC25 (Quad XOR) instead of IC37 (Hex Inverter), so here's the equivalent PCB for the Master. The 16MHz signal can be injected directly into the Master motherboard via LK60 pin B, so it doesn't require a PCB to replace any IC.

Solder jumpers 1 & 2 allow me to either invert the 6MHz signal from the clock fixer board, or alternatively use the original 6Mhz signal generated on the Master motherboard:
IC25 Schematic.JPG
IC25 - Render 01.JPG
IC25 - Render 02.JPG

Statistics: Posted by KenLowe — Wed Jun 12, 2024 12:38 am



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