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BBC Model B circuit diagram Original Acorn circuit schematic for a later Model B PCB (believed to be Issue 2) in two parts (right-click as choose Save Target As - previewing often doesn't work!)

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Superior Disk Protection Guide Superior Software made use of two versions of disk copy protection with their games. This article demonstrates ways around this. DISCLAIMER: This article is not endorsed by Retro Isle unless it is used for the purposes of backing up legally purchased software.

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BBC Forth Disassembly of the BBC Forth ROM, courtesy of BBCDocs.com