From 9f1c30e5869f5c85d0730809039c58140365b32b Mon Sep 17 00:00:00 2001
From: Ben Kurtovic <ben.kurtovic@gmail.com>
Date: Tue, 28 Apr 2015 18:09:06 -0500
Subject: [PATCH] Disallow SMS ROMs for now.

---
 src/assembler/tokenizer.c | 3 ++-
 src/rom.c                 | 6 ++++++
 src/rom.h                 | 1 +
 3 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/assembler/tokenizer.c b/src/assembler/tokenizer.c
index c576ab7..e21995b 100644
--- a/src/assembler/tokenizer.c
+++ b/src/assembler/tokenizer.c
@@ -154,8 +154,9 @@ static ErrorInfo* handle_block_directive(
 static ErrorInfo* parse_data(
     const ASMLine *line, ASMData **data_ptr, size_t offset)
 {
-    parser_func parser = (parser_func) parse_string;
     const char *directive;
+    parser_func parser = (parser_func) parse_string;
+
     if (IS_DIRECTIVE(line, DIR_BYTE)) {
         directive = DIR_BYTE;
         parser = parse_bytes;
diff --git a/src/rom.c b/src/rom.c
index ab62350..90a2b30 100644
--- a/src/rom.c
+++ b/src/rom.c
@@ -213,6 +213,12 @@ const char* rom_open(ROM **rom_ptr, const char *path)
         return rom_err_badheader;
     }
 
+    if (rom->region_code == 3 || rom->region_code == 4) {
+        // TODO: support SMS ROMs eventually?
+        rom_close(rom);
+        return rom_err_sms;
+    }
+
     *rom_ptr = rom;
     return NULL;
 }
diff --git a/src/rom.h b/src/rom.h
index d5a1c33..253b040 100644
--- a/src/rom.h
+++ b/src/rom.h
@@ -23,6 +23,7 @@ static const char* rom_err_notfile   = "Is not a regular file";
 static const char* rom_err_badsize   = "Invalid size";
 static const char* rom_err_badread   = "Couldn't read the entire file";
 static const char* rom_err_badheader = "Invalid header";
+static const char* rom_err_sms       = "Master System ROMs are not supported";
 
 /* Structs */