| Line 98... |
Line 98... |
localparam PUSH_REGISTER = 5'b11010;
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localparam PUSH_REGISTER = 5'b11010;
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localparam PULL_REGISTER = 5'b11011;
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localparam PULL_REGISTER = 5'b11011;
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localparam DUMMY = 5'b11100;
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localparam DUMMY = 5'b11100;
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localparam RESET = 5'b11111;
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localparam RESET = 5'b11111;
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// OPCODES TODO: verify how this get synthesised
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`include "t6507lp_package.v"
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`include "t6507lp_package.v"
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// rw_mem signals
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// rw_mem signals
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localparam MEM_READ = 1'b0;
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localparam MEM_READ = 1'b0;
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localparam MEM_WRITE = 1'b1;
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localparam MEM_WRITE = 1'b1;
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| Line 914... |
Line 913... |
indirectx = 1'b0;
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indirectx = 1'b0;
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indirecty = 1'b0;
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indirecty = 1'b0;
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relative = 1'b0;
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relative = 1'b0;
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zero_page = 1'b0;
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zero_page = 1'b0;
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zero_page_indexed = 1'b0;
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zero_page_indexed = 1'b0;
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//index_is_x = 1'b1;
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index_is_x = 1'b0;
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index_is_branch = 1'b0;
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index_is_branch = 1'b0;
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//index = 8'h00;
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//index = 8'h00;
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read = 1'b0;
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read = 1'b0;
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| Line 1074... |
Line 1073... |
end
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end
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ADC_ABX, AND_ABX, ASL_ABX, CMP_ABX, DEC_ABX, EOR_ABX, INC_ABX, LDA_ABX, LDY_ABX, LSR_ABX, ORA_ABX, ROL_ABX, ROR_ABX,
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ADC_ABX, AND_ABX, ASL_ABX, CMP_ABX, DEC_ABX, EOR_ABX, INC_ABX, LDA_ABX, LDY_ABX, LSR_ABX, ORA_ABX, ROL_ABX, ROR_ABX,
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SBC_ABX, STA_ABX: begin
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SBC_ABX, STA_ABX: begin
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absolute_indexed = 1'b1;
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absolute_indexed = 1'b1;
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index_is_x = 1'b1;
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index_is_x = 1'b1;
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//index = alu_x;
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end
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end
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ADC_ABY, AND_ABY, CMP_ABY, EOR_ABY, LDA_ABY, LDX_ABY, ORA_ABY, SBC_ABY, STA_ABY: begin
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ADC_ABY, AND_ABY, CMP_ABY, EOR_ABY, LDA_ABY, LDX_ABY, ORA_ABY, SBC_ABY, STA_ABY: begin
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absolute_indexed = 1'b1;
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absolute_indexed = 1'b1;
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index_is_x = 1'b0;
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index_is_x = 1'b0;
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//index = alu_y;
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end
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end
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ADC_IDX, AND_IDX, CMP_IDX, EOR_IDX, LDA_IDX, ORA_IDX, SBC_IDX, STA_IDX: begin
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ADC_IDX, AND_IDX, CMP_IDX, EOR_IDX, LDA_IDX, ORA_IDX, SBC_IDX, STA_IDX: begin
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indirectx = 1'b1;
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indirectx = 1'b1;
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index_is_x = 1'b1;
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index_is_x = 1'b1;
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//index = alu_x;
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end
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end
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ADC_IDY, AND_IDY, CMP_IDY, EOR_IDY, LDA_IDY, ORA_IDY, SBC_IDY, STA_IDY: begin
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ADC_IDY, AND_IDY, CMP_IDY, EOR_IDY, LDA_IDY, ORA_IDY, SBC_IDY, STA_IDY: begin
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indirecty = 1'b1;
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indirecty = 1'b1;
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index_is_x = 1'b0;
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index_is_x = 1'b0;
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//index = alu_y;
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end
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end
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JMP_ABS: begin
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JMP_ABS: begin
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absolute = 1'b1;
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absolute = 1'b1;
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jump = 1'b1;
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jump = 1'b1;
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end
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end
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