http://wiki.cardboardbox.org.uk/ 2012-02-07T13:12:15+00:00 http://wiki.cardboardbox.org.uk/ http://wiki.cardboardbox.org.uk/lib/tpl/default/images/favicon.ico text/html 2011-03-17T13:33:48+00:00 daniel http://wiki.cardboardbox.org.uk/doku.php?id=start&rev=1300368828&do=diff * 日本語のスタートページはこちらです。 Welcome to the second incarnation of my wiki. I decided phpwiki was a clumsy pile of poo after it managed to thrash all my pages so I've switched to dokuwiki instead. Seems a lot better. ^^ So what do we have here then?.. Basically a collection of stuff that is of little or no interest to most people, I've put it here mainly for myself and people I collaborate with. Feel free to read anything, editing is locked out however. text/html 2011-01-22T02:15:47+00:00 daniel http://wiki.cardboardbox.org.uk/doku.php?id=coding:problemmachine&rev=1295662547&do=diff A 4Bit arch with no operands.. -- Registers -- PC - 4Bit Program Counter A - 4Bit accumulator register A' - 4Bit shadow register -- Flags -- Z - Zero Flag -- IO Ports -- IN - 4Bit input port OUT - 4Bit output port -- Opcodes -- 0000 - SHL - Shift Left ( A = (A >> 1) ) 0001 - SHR - Shift Right ( A = (A << 1) ) 0010 - IN - ( A = IN ) 0011 - OUT - ( OUT = A ) 0100 - INC - Increment A ( if(A == 0){Z = 1}; else {Z = 0}); 0101 - DEC - Decrement A ( if(A == 0){Z = 1}; else {Z = 0}); 01…