michaelkuc6/blog_os
1
0
Fork 0
mirror of https://github.com/phil-opp/blog_os.git synced 2025-12-17 14:57:49 +00:00
Code Issues Projects Releases Wiki Activity

Convert all external links to https (if supported)

Browse Source
This commit is contained in:
Philipp Oppermann
2020-02-21 11:53:34 +01:00
parent 361108b88e
commit 0619f3a9e7
33 changed files with 120 additions and 120 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
blog/content/second-edition/posts/03-vga-text-buffer/index.md
View File

@@ -237,7 +237,7 @@ impl Writer {
The VGA text buffer only supports ASCII and the additional bytes of [code page 437]. Rust strings are [UTF-8] by default, so they might contain bytes that are not supported by the VGA text buffer. We use a match to differentiate printable ASCII bytes (a newline or anything in between a space character and a `~` character) and unprintable bytes. For unprintable bytes, we print a `■` character, which has the hex code `0xfe` on the VGA hardware.
[code page 437]: https://en.wikipedia.org/wiki/Code_page_437
[UTF-8]: http://www.fileformat.info/info/unicode/utf8.htm
[UTF-8]: https://www.fileformat.info/info/unicode/utf8.htm
#### Try it out!
To write some characters to the screen, you can create a temporary function:
@@ -307,8 +307,8 @@ volatile = "0.2.6"
The `0.2.6` is the [semantic] version number. For more information, see the [Specifying Dependencies] guide of the cargo documentation.
[semantic]: http://semver.org/
[Specifying Dependencies]: http://doc.crates.io/specifying-dependencies.html
[semantic]: https://semver.org/
[Specifying Dependencies]: https://doc.crates.io/specifying-dependencies.html
Let's use it to make writes to the VGA buffer volatile. We update our `Buffer` type as follows: