Add input system support to Doom demo

This contribution makes Doom demo compatible with the input event system and adds a list of all common Doom key bindings to docs/demo.md.
sysprog21 · Aug 19, 2022 · 6ba6af3 · 6ba6af3
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diff --git a/README.md b/README.md
@@ -103,6 +103,7 @@ In `rv32emu` repository, there are some prebuilt ELF files for testing purpose.
 * `dhrystone.elf` : See [rv8-bench](https://github.com/michaeljclark/rv8-bench)
 * `pi.elf` : See [tests/pi.c](tests/pi.c)
 * `quake.elf` : See [sysprog21/quake-embedded](https://github.com/sysprog21/quake-embedded)
+* `doom.elf` : See [alanjian85/doom_riscv](https://github.com/alanjian85/doom_riscv)
 
 ## Reference
 

diff --git a/build/doom.elf b/build/doom.elf
diff --git a/docs/demo.md b/docs/demo.md
@@ -9,8 +9,14 @@
 
 ![Doom Gameplay](https://imgur.com/bLc5LG8.gif)
 
-### Limitations
-* The input system is not supported yet
+### Main Key Bindings (All key bindings are listed in the "READ THIS!" menu)
+* Move Forward/Backward: Up Arrow Key/Down Arrow Key
+* Move Left/Right: Comma(,) Key/Period(.) Key
+* Turn Left/Right: Left Arrow Key/Right Arrow Key
+* Shoot: Left Mouse Button or CTRL Key
+* Sprint: Shift Key
+* 1: Fist
+* 3: Shotgun
 
 ## Quake
 **source**: [quake-embedded](https://github.com/sysprog21/quake-embedded/)