Implement LDI

1 files changed, 8 insertions, 0 deletions

diff --git a/eater_cpu/eater_decoder.sv b/eater_cpu/eater_decoder.sv
index fea00e0..20e3e0b 100644
--- a/eater_cpu/eater_decoder.sv
+++ b/eater_cpu/eater_decoder.sv
@@ -30,6 +30,7 @@ function CpuState insdep_state;
     ADD: insdep_state = ADD_INS_to_MAR;
     SUB: insdep_state = SUB_INS_to_MAR;
     STA: insdep_state = STA_INS_to_MAR;
+    LDI: insdep_state = LDI_INS_to_A;
     OUT: insdep_state = OUT_A_to_OUT;
     HALT_op: insdep_state = HALT_st;
 
@@ -65,6 +66,8 @@ always @(posedge clk_i) begin
     STA_INS_to_MAR: next_state = STA_A_to_MEM;
     STA_A_to_MEM: next_state = PC_to_MAR;
 
+    LDI_INS_to_A: next_state = PC_to_MAR;
+
     OUT_A_to_OUT: next_state = PC_to_MAR;
 
     HALT_st: next_state = HALT_st;
@@ -153,6 +156,11 @@ always_comb begin
         internal_flags.A_out = 1;
     end
 
+    LDI_INS_to_A: begin
+        internal_flags.INS_out = 1;
+        internal_flags.A_in = 1;
+    end
+
     OUT_A_to_OUT: begin
         internal_flags.A_out = 1;
         internal_flags.OUT_in = 1;