eater: Add subtract flag

3 files changed, 4 insertions, 3 deletions

diff --git a/eater_cpu/cpp/simpc_term.cpp b/eater_cpu/cpp/simpc_term.cpp
index f598f6e..8ddf83d 100644
--- a/eater_cpu/cpp/simpc_term.cpp
+++ b/eater_cpu/cpp/simpc_term.cpp
@@ -60,7 +60,8 @@ void simpc_ui_write(const std::unique_ptr<Veater_computer> &topp, uint64_t i) {
       topp->eater_computer->flags.__PVT__INS_out ? 'X' : ' ',
       topp->eater_computer->flags.__PVT__A_in ? 'X' : ' ',
       topp->eater_computer->flags.__PVT__A_out ? 'X' : ' ',
-      topp->eater_computer->flags.__PVT__ALU_out ? 'X' : ' ', sub ? 'X' : ' ',
+      topp->eater_computer->flags.__PVT__ALU_out ? 'X' : ' ',
+      topp->eater_computer->flags.__PVT__ALU_subtract_nadd ? 'X' : ' ',
       topp->eater_computer->flags.__PVT__B_in ? 'X' : ' ',
       topp->eater_computer->flags.__PVT__B_out ? 'X' : ' ',
       topp->eater_computer->flags.__PVT__OUT_in ? 'X' : ' ',
diff --git a/eater_cpu/eater_computer.sv b/eater_cpu/eater_computer.sv
index 7c8eb17..18b6833 100644
--- a/eater_cpu/eater_computer.sv
+++ b/eater_cpu/eater_computer.sv
@@ -130,7 +130,7 @@ eater_alu alu (
   .en_output_in(flags.ALU_out),
   .A_in(A_out),
   .B_in(B_out),
-  .subtract_n_add_in(1'b0),
+  .subtract_n_add_in(flags.ALU_subtract_nadd),
   .bus_out(bus)
 );
 
diff --git a/eater_cpu/eater_types.sv b/eater_cpu/eater_types.sv
index 80a5fee..6be4d9d 100644
--- a/eater_cpu/eater_types.sv
+++ b/eater_cpu/eater_types.sv
@@ -54,7 +54,7 @@ typedef struct {
     logic INS_out, INS_in;
     logic MAR_in;
     logic RAM_out, RAM_in;
-    logic ALU_out;
+    logic ALU_out, ALU_subtract_nadd;
     logic PC_out, PC_in, PC_count;
     logic OUT_in;
 } CpuControlFlags;