?? pc_io.v
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////////////////////////////////////////////////////////////////////////////////////////////////////////內部聯絡信號寄存器//////////////////////////////////////////////////////////////////////////////////////////////////// //-----INTEA_In----- always @ (reset or Flag or PortC_Out_Ld[4] or PortC_RS) if(reset) INTEA_In = 1'b0; //復位清0; else if(Flag==1'b0 && PortC_Out_Ld[4]==1'b0) INTEA_In = PortC_RS; //由PC4置位復位決定; else INTEA_In = INTEA_In; //否則鎖存原值; //-----INTEA_Out----- always @ (reset or Flag or PortC_Out_Ld[6] or PortC_RS) if(reset) INTEA_Out = 1'b0; //復位清0; else if(Flag==1'b0 && PortC_Out_Ld[6]==1'b0) INTEA_Out = PortC_RS; //由PC6置位復位決定 else INTEA_Out = INTEA_Out; //否則鎖存原值; //-----INTEB----- always @ (reset or Flag or PortC_Out_Ld[2] or PortC_RS) if(reset) INTEB = 1'b0; //復位清0; else if(Flag==1'b0 && PortC_Out_Ld[2]==1'b0) INTEB = PortC_RS; //由PC6置位復位決定; else INTEB = INTEB; //否則鎖存原值; //-----nOBFA----- //-----nWR上升沿將其復位,nACKA將其置位,默認為高電平; always @ (reset or ModeA or PortA_IO or nWR or nACKA or A or nSTBA) if(reset) nOBFAstate=2'd0; else case(nOBFAstate) 2'd0: if(ModeA!=2'b00 && PortA_IO==1'b1 && nWR==1'b0) nOBFAstate=2'd1; else nOBFAstate=2'd0; 2'd1: if(nWR==1'b1 && A==2'b00) nOBFAstate=2'd2; else nOBFAstate=2'd1; 2'd2: if(nACKA==1'b0) //nWR上升沿; nOBFAstate=2'd0; else nOBFAstate=2'd2; default: nOBFAstate=2'd0; endcase always @ (nOBFAstate) if(nOBFAstate==2'd2) //nWR上升沿情況; nOBFA=1'b0; else nOBFA=1'b1; //-----nOBFB----- //-----nWR上升沿將其復位,nACKB將其置位,默認為高電平; always @ (reset or ModeB or PortB_IO or nWR or nACKB or A) if(reset) nOBFBstate=2'd0; else case(nOBFBstate) 2'd0: if(ModeB==1'b1 && PortB_IO==1'b1 && nWR==1'b0) nOBFBstate=2'd1; else nOBFBstate=2'd0; 2'd1: if(nWR==1'b1 && A==2'b01) nOBFBstate=2'd2; else nOBFBstate=2'd1; 2'd2: if(ModeB==2'b01 && nACKB==1'b0) nOBFBstate=2'd0; else nOBFBstate=2'd2; default: nOBFBstate=2'd0; endcase always @ (nOBFBstate) if(nOBFBstate==2'd2) nOBFB=1'b0; else nOBFB=1'b1; //-----INTRA_In----- //-----nSTBA,IBFA,都為高時置位,nRD下降沿復位; always @ (reset or ModeA or PortA_IO or nSTBA or IBFA or nRD) if(reset) INTRA_Instate=2'd0; else case(INTRA_Instate) 2'd0: if(ModeA!=2'b00 && nSTBA==1'b1 && IBFA==1'b1) INTRA_Instate=2'd1; else INTRA_Instate=2'd0; 2'd1: if(nRD==1'b0) INTRA_Instate=2'd2; else INTRA_Instate=2'd1; 2'd2: if(nRD==1'b1) INTRA_Instate=2'd0; else INTRA_Instate=2'd2; default: INTRA_Instate=2'd0; endcase always @ (INTRA_Instate) if(INTRA_Instate==2'd1 || INTRA_Instate==2'd2) INTRA_In=1'b1; else INTRA_In=1'b0; //-----INTRB_In----- //-----nSTBB,IBFB,都為高時置位,nRD下降沿復位; always @ (reset or ModeB or PortB_IO or nSTBB or IBFB or nRD) if(reset) INTRB_Instate=2'd0; else case(INTRB_Instate) 2'd0: if(ModeB==2'b01 && nSTBB==1'b1 && IBFB==1'b1) INTRB_Instate=2'd1; else INTRB_Instate=2'd0; 2'd1: if(nRD==1'b0) INTRB_Instate=2'd2; else INTRB_Instate=2'd1; 2'd2: if(nRD==1'b1) INTRB_Instate=2'd0; else INTRB_Instate=2'd2; default: INTRB_Instate=2'd0; endcase always @ (INTRB_Instate) if(INTRB_Instate==2'd1 || INTRB_Instate==2'd2) INTRB_In=1'b1; else INTRB_In=1'b0; //-----INTRA_Out----- //-----nACKA,nOBFA,都為高時置位,nWR下降沿復位; always @ (reset or ModeA or PortA_IO or nACKA or nOBFA or nWR) if(reset) INTRA_Outstate=2'd0; else case(INTRA_Outstate) 2'd0: if(ModeA!=2'b00 && PortA_IO==1'b1 && nACKA==1'b1 && nOBFA==1'b1) INTRA_Outstate=2'd1; else INTRA_Outstate=2'd0; 2'd1: if(nWR==1'b0) INTRA_Outstate=2'd2; else INTRA_Outstate=2'd1; 2'd2: if(nWR==1'b1) INTRA_Outstate=2'd3; else if(PortA_IO==1'b0) INTRA_Outstate=2'd0; else INTRA_Outstate=2'd2; 2'd3: if(ModeA!=2'b00 && PortA_IO==1'b1 && nACKA==1'b1 && nOBFA==1'b1) INTRA_Outstate=2'd1; else if(PortA_IO==1'b0) INTRA_Outstate=2'd0; else INTRA_Outstate=2'd3; default: INTRA_Outstate=2'd0; endcase always @ (INTRA_Outstate) if(INTRA_Outstate==2'd3) INTRA_Out=1'b0; else INTRA_Out=1'b1; //-----INTRB_Out----- //-----nACKB,nOBFB,都為高時置位,nWR下降沿復位; always @ (reset or ModeB or PortB_IO or nACKB or nOBFB or nWR) if(reset) INTRB_Outstate=2'd0; else case(INTRB_Outstate) 2'd0: if(ModeB==2'b01 && PortB_IO==1'b1 && nACKB==1'b1 && nOBFB==1'b1) INTRB_Outstate=2'd1; else INTRB_Outstate=2'd0; 2'd1: if(nWR==1'b0) INTRB_Outstate=2'd2; else if(PortB_IO==1'b0) INTRB_Outstate=2'd0; else INTRB_Outstate=2'd1; 2'd2: if(nACKB==1'b0) INTRB_Outstate=2'd3; else if(PortB_IO==1'b0) INTRB_Outstate=2'd0; else INTRB_Outstate=2'd2; 2'd3: if(nACKB==1'b1) INTRB_Outstate=2'd0; else INTRB_Outstate=2'd3; default: INTRB_Outstate=2'd0; endcase always @ (INTRB_Outstate) if(INTRB_Outstate==2'd2 || INTRB_Outstate==2'd3) INTRB_Out=1'b0; else INTRB_Out=1'b1; //-----IBFA----- //-----由nSTBA信號置位,由nRD上升沿復位; always @ (reset or ModeA or PortA_IO or nSTBA or nRD) IBFAstate=2'd0; else case(IBFAstate) 2'd0: if(ModeA!=2'b00 && PortA_IO==1'b0 && nSTBA==1'b0) IBFAstate=2'd1; else IBFAstate=2'd0; 2'd1: if(nRD==1'b0) IBFAstate=2'd2; else IBFAstate=2'd1; 2'd2: if(nRD==1'b1) IBFAstate=2'd0; else IBFAstate=2'd2; default: IBFAstate=2'd0; endcase always @ (IBFAstate) if(IBFAstate==2'd1 || IBFAstate==2'd2) IBFA = 1'b1; else IBFA = 1'b0; //-----IBFB----- //-----由nSTBB信號置位,由nRD上升沿復位; always @ (reset or ModeB or PortB_IO or nSTBB or nRD) if(reset) IBFBstate=2'd0; else case(IBFBstate) 2'd0: if(ModeB==2'b01 && PortB_IO==1'b0 && nSTBB==1'b0) IBFBstate=2'd1; else IBFBstate=2'd0; 2'd1: if(nRD==1'b0) IBFBstate=2'd2; else IBFBstate=2'd1; 2'd2: if(nRD==1'b1) IBFBstate=2'd0; else IBFBstate=2'd2; default: IBFBstate=2'd0; endcase always @ (IBFBstate) if(IBFBstate==2'd1 || IBFBstate==2'd2) IBFB = 1'b1; else IBFB = 1'b0; endmodule?? 快捷鍵說明
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