From ffaa5353031149ab2416bcf6d8b46e0a44a3bb39 Mon Sep 17 00:00:00 2001
From: Miquel Sabaté Solà <mikisabate@gmail.com>
Date: Fri, 12 Sep 2025 21:18:34 +0200
Subject: readrom: Add detection of RAM, Timing and mirroring
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Signed-off-by: Miquel Sabaté Solà <mikisabate@gmail.com>
---
 crates/readrom/src/main.rs | 48 ++++++++++++++++++++++++++++++++++++++--------
 1 file changed, 40 insertions(+), 8 deletions(-)

(limited to 'crates/readrom/src/main.rs')

diff --git a/crates/readrom/src/main.rs b/crates/readrom/src/main.rs
index e930e0e..16dfa90 100644
--- a/crates/readrom/src/main.rs
+++ b/crates/readrom/src/main.rs
@@ -62,39 +62,71 @@ fn parse_arguments() -> Args {
     res
 }
 
+// Capitalize the given string.
+fn capitalize(s: &str) -> String {
+    let mut c = s.chars();
+    match c.next() {
+        None => String::new(),
+        Some(f) => f.to_uppercase().collect::<String>() + c.as_str(),
+    }
+}
+
 fn print_header(header: &Header) {
     println!("Header:");
 
     match header.kind {
-        Kind::INes => println!("  Kind:\t\tiNES"),
-        Kind::Nes20 => println!("  Kind:\t\tNES 2.0"),
+        Kind::INes => println!("  Kind:\t\t\tiNES"),
+        Kind::Nes20 => println!("  Kind:\t\t\tNES 2.0"),
     }
 
     println!(
-        "  PRG ROM size:\t{} bytes ({}KB)",
+        "  PRG ROM size:\t\t{} bytes ({}KB)",
         header.prg_rom_size * 16 * 1024,
         header.prg_rom_size * 16
     );
     println!(
-        "  CHR ROM size:\t{} bytes ({}KB)",
+        "  CHR ROM size:\t\t{} bytes ({}KB)",
         header.chr_rom_size * 8 * 1024,
         header.chr_rom_size * 8
     );
-    println!("  Mapper:\t{}", header.mapper);
+
+    if let Some(def) = &header.prg_ram_definition {
+        println!(
+            "  PRG-RAM size:\t\t{} bytes ({}KB); {}",
+            def.size,
+            def.size / 1024,
+            def.kind
+        );
+    }
+    if let Some(def) = &header.chr_ram_definition {
+        println!(
+            "  CHR-RAM size:\t\t{} bytes ({}KB); {}",
+            def.size,
+            def.size / 1024,
+            def.kind
+        );
+    }
+
+    println!("  Mapper:\t\t{}", header.mapper);
+    println!(
+        "  Mirroring:\t\t{}",
+        capitalize(header.nametable_arrangement.mirroring())
+    );
+    println!("  CPU/PPU timing:\t{}", header.timing);
 }
 
 fn print_vectors(addrs: &[u8]) {
     println!("Vectors:");
     println!(
-        "  NMI:\t\t{:#04x}",
+        "  NMI:\t\t\t{:#04x}",
         u16::from_le_bytes([addrs[0], addrs[1]])
     );
     println!(
-        "  Reset:\t{:#04x}",
+        "  Reset:\t\t{:#04x}",
         u16::from_le_bytes([addrs[2], addrs[3]])
     );
     println!(
-        "  IRQ:\t\t{:#04x}",
+        "  IRQ:\t\t\t{:#04x}",
         u16::from_le_bytes([addrs[4], addrs[5]])
     );
 }
-- 
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