From cd2e5319bc503dd24c83b1a081ee1377685b3b28 Mon Sep 17 00:00:00 2001
From: Mwa <mwa@mwaaa.fr>
Date: Mon, 16 Mar 2026 18:10:43 +0100
Subject: [PATCH] minor bugfixes

---
 asm/src/main.rs  | 4 ++++
 simu/src/cpu.rs  | 3 ++-
 simu/src/main.rs | 8 ++++++--
 3 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/asm/src/main.rs b/asm/src/main.rs
index 3b74036..ae05df7 100644
--- a/asm/src/main.rs
+++ b/asm/src/main.rs
@@ -579,6 +579,10 @@ fn process_line(prgm: &mut Program, (linenum, line): (usize, String), rgx: &Rege
             chk(2);
             Instruction::Xor(reg(0), reg(1), Op2::Direct(-1))
         }
+        "swi" => {
+            chk(0);
+            Instruction::Swi()
+        }
         "let" => {
             chk(2);
             let r = reg(0);
diff --git a/simu/src/cpu.rs b/simu/src/cpu.rs
index ea7ce2f..4371d27 100644
--- a/simu/src/cpu.rs
+++ b/simu/src/cpu.rs
@@ -281,7 +281,7 @@ impl Display for Cond {
 #[cfg(feature = "debug")]
 pub(crate) fn instr_to_text(i: u32, a: u32, book: &HashMap<u32, String>) -> String {
     let addr = |addr: u32| {
-        let real = a.wrapping_add(addr * 4);
+        let real = a.wrapping_add(addr * 4) % 0x8000_0000;
         match book.get(&real) {
             Some(s) => s.clone(),
             None => format!("{addr}"),
@@ -722,6 +722,7 @@ impl Computer {
         if N >= 16 {
             panic!();
         }
+        #[cfg(feature = "debug")]
         println!("serving interupt {kind:?} {arg:?}");
         match self.interupts {
             InteruptState::Disabled => {
diff --git a/simu/src/main.rs b/simu/src/main.rs
index e711ed7..ba40140 100644
--- a/simu/src/main.rs
+++ b/simu/src/main.rs
@@ -323,7 +323,11 @@ fn main() -> Result<(), Error> {
                                 simulation.regs[i + 1]
                             );
                         }
-                        println!("SP: {:08x}     PC: {:08x}", simulation.sp, simulation.pc);
+                        println!(
+                            "SP: {:08x}     PC: {:08x}",
+                            simulation.sp * 4,
+                            simulation.pc * 4
+                        );
                         println!("RAM near SP");
                         let min_pc = (simulation.pc).min(0x0100_0000 / 4 - 8);
                         let min_sp = (simulation.sp).min(0x0100_0000 / 4 - 8);
@@ -381,7 +385,7 @@ fn main() -> Result<(), Error> {
                                     if next.len() >= 2 {
                                         match parse_int::parse::<u32>(next[1]) {
                                             Ok(i) => {
-                                                let v = simulation.ram[i as usize/4];
+                                                let v = simulation.ram[i as usize / 4];
                                                 println!(
                                                     "0x{:8x} -- {}",
                                                     v,