68hc08

Opcode 7e defective #1

Closed crina opened this issue about 17 years ago

Opcode 7e is implemented as "mov ,x,opr8a" but should be "mov ,x+,opr8a". Postincrementation is missing. Possible fix:

@@ -2038,6 +1931,7 @@ dataMux <= outHelp; addrMux <= addrTM; regPC <= regPC + 1;

           regHX <= regHX + 1; --Postincrement
             mainFSM <= "0110";
           when x"80" | x"82" =>  -- RTI, RTT
             regHX(7 downto 0) <= datain;

@@ -2424,6 +2318,7 @@

Corrected opcode 0x7E added regHX <= regHX + 1;

Thank you

riedelx closed this about 17 years ago

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