Add files from previous version

hw/efinix_fpga/super6502.sv

@@ -38,10 +38,33 @@ module super6502
     output	logic [1:0] o_sdr_DQM,
 
     input uart_rx,
-    output uart_tx
+    output uart_tx,
 
+    output sd_cs,
+    output sd_clk,
+
+    input sd_cmd_IN,
+    output sd_cmd_OUT,
+    output sd_cmd_OE,
+
+    input sd_data_IN,
+    output sd_data_OUT,
+    output sd_data_OE
 );
 
+assign sd_cs = '1;
+
+logic o_sd_cmd, i_sd_cmd;
+logic o_sd_data, i_sd_data;
+
+assign i_sd_cmd = sd_cmd_IN;
+assign sd_cmd_OUT = '0;
+assign sd_cmd_OE = ~o_sd_cmd;
+
+assign i_sd_data = sd_data_IN;
+assign sd_data_OUT = '0;
+assign sd_data_OE = ~o_sd_data;
+
 assign pll_cpu_reset = '1;
 assign o_pll_reset = '1;
 
@@ -72,6 +95,7 @@ logic w_timer_cs;
 logic w_multiplier_cs;
 logic w_divider_cs;
 logic w_uart_cs;
+logic w_sdcard_cs;
 
 addr_decode u_addr_decode(
     .i_addr(cpu_addr),
@@ -81,6 +105,7 @@ addr_decode u_addr_decode(
     .o_multiplier_cs(w_multiplier_cs),
     .o_divider_cs(w_divider_cs),
     .o_uart_cs(w_uart_cs),
+    .o_sdcard_cs(w_sdcard_cs),
     .o_sdram_cs(w_sdram_cs)
 );
 
@@ -90,6 +115,7 @@ logic [7:0] w_timer_data_out;
 logic [7:0] w_multiplier_data_out;
 logic [7:0] w_divider_data_out;
 logic [7:0] w_uart_data_out;
+logic [7:0] w_sdcard_data_out;
 logic [7:0] w_sdram_data_out;
 
 always_comb begin
@@ -105,6 +131,8 @@ always_comb begin
         cpu_data_out = w_divider_data_out;
     else if (w_uart_cs)
         cpu_data_out = w_uart_data_out;
+    else if (w_sdcard_cs)
+        cpu_data_out = w_sdcard_data_out;
     else if (w_sdram_cs)
         cpu_data_out = w_sdram_data_out;
     else
@@ -182,6 +210,31 @@ uart_wrapper u_uart(
     .irqb(w_uart_irqb)
 );
 
+logic sd_clk;
+always @(posedge clk_2) begin
+    sd_clk <= ~sd_clk;
+end
+
+
+sd_controller sd_controller(
+    .clk(clk_2),
+    .sd_clk(sd_clk),
+    .rst(rst),
+    .addr(cpu_addr[2:0]),
+    .data(cpu_data_in),
+    .cs(w_sdcard_cs),
+    .rw(cpu_rwb),
+
+    .i_sd_cmd(i_sd_cmd),
+    .o_sd_cmd(o_sd_cmd),
+
+    .i_sd_data(i_sd_data),
+    .o_sd_data(o_sd_data),
+
+    .data_out(w_sdcard_data_out)
+);
+
+
 sdram_adapter u_sdram_adapter(
     .i_cpuclk(clk_2),
     .i_arst(~button_reset),