Add a bunch of microcoded instructions.

This is a minimum viable PDP-8 that can print "Hello, world!" and halt.

1 files changed, 13 insertions, 8 deletions

diff --git a/sim/main.cpp b/sim/main.cpp
index f082464..cc1c596 100644
--- a/sim/main.cpp
+++ b/sim/main.cpp
@@ -5,6 +5,13 @@
 
 #include "Vtop.h"
 
+std::uint64_t phases = 0;
+
+double sc_time_stamp()
+{
+    return (double)phases / 2;
+}
+
 int main(int argc, const char *argv[])
 {
     Verilated::commandArgs(argc, argv);
@@ -21,31 +28,29 @@ int main(int argc, const char *argv[])
 
     std::cout << "*** RESET SEQUENCE ***\n";
 
-    std::uint64_t time = 0;
-
     top.native_clk = 0;
     top.reset_n = 0;
     top.eval();
-    vcd.dump(++time);
+    vcd.dump(++phases);
 
     top.native_clk = 1;
     top.eval();
-    vcd.dump(++time);
+    vcd.dump(++phases);
 
     top.native_clk = 0;
     top.reset_n = 1;
     top.eval();
-    vcd.dump(++time);
+    vcd.dump(++phases);
 
     std::cout << "*** MAIN LOOP ***\n";
 
-    for (unsigned int i = 0; i < 100000 && !Verilated::gotFinish(); ++i) {
+    for (unsigned int i = 0; i < 10000 && !Verilated::gotFinish(); ++i) {
         top.native_clk = 1;
         top.eval();
-        vcd.dump(++time);
+        vcd.dump(++phases);
         top.native_clk = 0;
         top.eval();
-        vcd.dump(++time);
+        vcd.dump(++phases);
     }
 
     std::cout << "\n";