32 lines
1.1 KiB
Systemverilog
32 lines
1.1 KiB
Systemverilog
`default_nettype none
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module ROM(
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input var logic[7:0] address,
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output var logic[7:0] dataout
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);
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always @(address) case (address)
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// Add and Jump
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// 8'b00000000: dataout = 8'b00000101; // reg0 = 5
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// 8'b00000001: dataout = 8'b10000001; // reg1 = reg0
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// 8'b00000010: dataout = 8'b00001010; // reg0 = 10
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// 8'b00000011: dataout = 8'b10000010; // reg2 = reg0
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// 8'b00000100: dataout = 8'b01000100; // reg3 = reg1 + reg2
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// 8'b00000101: dataout = 8'b10011001; // reg1 = reg3
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// 8'b00000110: dataout = 8'b00001111; // reg0 = 15
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// 8'b00000111: dataout = 8'b10000010; // reg2 = reg0
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// 8'b00001000: dataout = 8'b01000101; // reg3 = reg1 - reg2
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// 8'b00001001: dataout = 8'b00000000; // reg0 = 0
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// 8'b00001010: dataout = 8'b11000001; // Jump to 0 if reg3 == 0
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// Input and Output
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8'b00000001: dataout = 8'b10110001; // reg1 = cpuin
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8'b00000010: dataout = 8'b00001010; // reg0 = 10
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8'b00000011: dataout = 8'b10000010; // reg2 = reg0
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8'b00000100: dataout = 8'b01000100; // reg3 = reg1 + reg2
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8'b00000101: dataout = 8'b10011110; // cpuout = reg3
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default: dataout = 8'b00000000;
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endcase
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endmodule
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