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https://opencores.org/ocsvn/c16/c16/trunk
[/] [c16/] [trunk/] [vhdl/] [cpu_engine.vhd] - Diff between revs 21 and 23
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| Rev 21 |
Rev 23 |
| Line 358... |
Line 358... |
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process(CLK_I)
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process(CLK_I)
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begin
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begin
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if (rising_edge(CLK_I)) then
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if (rising_edge(CLK_I)) then
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if (RST_I = '1') then T2 <= '0';
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if (RST_I = '1') then T2 <= '0';
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else T2 <= not T2;
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elsif (CE = '1') then T2 <= not T2;
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end if;
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end if;
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end if;
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end if;
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end process;
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end process;
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process(T2, M_PC, ADR, C_IO, C_RD_O, C_WE_O)
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process(T2, M_PC, ADR, C_IO, C_RD_O, C_WE_O)
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| Line 385... |
Line 385... |
-- clock read data to XM_OPCODE in T1 or to XM_RDAT in T2
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-- clock read data to XM_OPCODE in T1 or to XM_RDAT in T2
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--
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--
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process(CLK_I)
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process(CLK_I)
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begin
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begin
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if (rising_edge(CLK_I)) then
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if (rising_edge(CLK_I)) then
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if (CE = '1') then
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if (T2 = '0') then
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if (T2 = '0') then
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OPCS <= EXTERN;
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OPCS <= EXTERN;
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XM_OPC <= DAT_I;
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XM_OPC <= DAT_I;
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else
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else
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RDATS <= EXTERN;
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RDATS <= EXTERN;
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XM_RDAT <= DAT_I;
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XM_RDAT <= DAT_I;
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end if;
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end if;
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end if;
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end if;
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end if;
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end process;
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end process;
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M_OPC <= LM_OPC when (OPCS = '0') else XM_OPC;
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M_OPC <= LM_OPC when (OPCS = '0') else XM_OPC;
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ADR_O <= M_PC when (T2 = '0') else ADR;
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ADR_O <= M_PC when (T2 = '0') else ADR;
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RDAT <= LM_RDAT when (RDATS = '0') else XM_RDAT;
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RDAT <= LM_RDAT when (RDATS = '0') else XM_RDAT;
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