Merge branch 'post-05' into post-06

.gitignore

@@ -1,2 +1,4 @@
 /target
-**/*.rs.bk
+**/*.rs.bk
+
+.vscode

Cargo.lock

@@ -4,101 +4,126 @@
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+ "nodrop",
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 [[package]]
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- "volatile 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "x86_64 0.7.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bootloader",
+ "lazy_static",
+ "spin",
+ "uart_16550",
+ "volatile",
+ "x86_64",
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 [[package]]
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 [[package]]
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+ "array-init",
+ "bit_field",
+ "bitflags",
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-
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