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//=============================================================================
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//=============================================================================
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// Fetch instruction
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// Fetch instruction
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//
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//
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//
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//
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// (C) 2009,2010,2012 Robert Finch, Stratford
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// (C) 2009,2010,2012,2013 Robert Finch, Stratford
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// robfinch<remove>@opencores.org
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// robfinch<remove>@finitron.ca
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//
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//
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//
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//
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// This source file is free software: you can redistribute it and/or modify
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// This source file is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published
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// it under the terms of the GNU Lesser General Public License as published
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// by the Free Software Foundation, either version 3 of the License, or
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// by the Free Software Foundation, either version 3 of the License, or
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//
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//
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//=============================================================================
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//=============================================================================
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//
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//
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IFETCH:
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IFETCH:
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begin
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begin
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$display("\r\n******************************************************");
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$display("time: %d", $time);
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$display("CSIP: %h", csip);
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$display("CSIP: %h", csip);
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$display("AX=%h SI=%h", ax, si);
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$display("BX=%h DI=%h", bx, di);
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$display("CX=%h BP=%h", cx, bp);
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$display("DX=%h SP=%h", dx, sp);
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// Reset all instruction processing flags at instruction fetch
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// Reset all instruction processing flags at instruction fetch
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cyc_type <= `CT_PASSIVE;
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cyc_type <= `CT_PASSIVE;
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mod <= 2'd0;
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mod <= 2'd0;
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rrr <= 3'd0;
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rrr <= 3'd0;
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rm <= 3'd0;
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rm <= 3'd0;
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end
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end
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IFETCH_ACK:
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IFETCH_ACK:
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if (ack_i) begin
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if (ack_i) begin
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nack_ir();
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nack_ir();
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$display("IR: %h",dat_i);
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$display("CSIP: %h IR: %h",csip,dat_i);
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if (!hasPrefix)
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if (!hasPrefix)
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ir_ip <= ip;
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ir_ip <= ip;
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// ir_ip <= dat_i;
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// ir_ip <= dat_i;
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w <= dat_i[0];
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w <= dat_i[0];
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d <= dat_i[1];
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d <= dat_i[1];
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