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-rw-r--r--src/lib.rs23
1 files changed, 22 insertions, 1 deletions
diff --git a/src/lib.rs b/src/lib.rs
index f5bf110..ebbc92f 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -14,7 +14,7 @@
// You should have received a copy of the GNU General Public License
// along with rustv. If not, see <http://www.gnu.org/licenses/>.
-#![feature(associated_consts)]
+#![feature(step_by)]
pub mod isa;
pub mod binary;
pub mod memory;
@@ -57,4 +57,25 @@ mod tests {
assert_eq!(dm_cache_doubleword.parse_address(0xFFFFFFFD),
(0x7FFFFFF, 3, 5));
}
+
+ #[test]
+ fn memory_rw() {
+ use memory::*;
+ let size = 0xFF;
+ let mut memory = Memory::new(size);
+
+ assert_eq!(memory.write_word(0, 0xF0),
+ Err(MemoryError::InvalidAddress));
+ assert_eq!(memory.write_byte(0, 0xF0),
+ Err(MemoryError::InvalidAddress));
+ assert_eq!(memory.write_byte(1, 0xF0),
+ Err(MemoryError::InvalidAddress));
+ assert_eq!(memory.write_byte(2, 0xF0),
+ Err(MemoryError::InvalidAddress));
+
+ for address in (4..size).step_by(4) {
+ assert_eq!(memory.write_word(address, 0xF0), Ok(()));
+ assert_eq!(memory.read_word(address), Ok(0xF0));
+ }
+ }
}