rv wrapper

examples/simple.rs

@@ -0,0 +1,13 @@
+use rsrv::rv::*;
+
+fn main() {
+    let cpu = RV::new(0x10000, vec![0x02A88893, 0x00000073]);
+
+    while RV::step(cpu) != RV_EECALL {}
+
+    println!(
+        "Environment call @ {:08x}: {}",
+        RV::get_pc(cpu),
+        RV::get_r(cpu)[17]
+    );
+}