mirror of https://github.com/hsoft/collapseos.git
17 lines
376 B
Plaintext
17 lines
376 B
Plaintext
( c n -- c )
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( Computes n into crc c with polynomial 0x1021 )
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: _crc16
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SWAP DUP 256 / ( n c c>>8 )
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ROT XOR ( c x )
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DUP 16 / XOR ( c x^x>>4 )
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SWAP 256 * ( x c<<8 )
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OVER 4096 * XOR ( x c^x<<12 )
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OVER 32 * XOR ( x c^x<<5 )
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XOR ( c )
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;
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( send-and-crc7 )
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( n c -- c )
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: _s+crc SWAP DUP _sdcSR DROP _crc7 ;
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