From c23c47325a7818c4df4097878f101cd80e2fe361 Mon Sep 17 00:00:00 2001
From: Ben Bridle <ben@derelict.engineering>
Date: Tue, 25 Mar 2025 12:00:15 +1300
Subject: Partially restructure the library

This also changes bit-shifting semantics, shifting left and then right
instead of the other way around.
---
 src/components/device_bus.rs | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)
 create mode 100644 src/components/device_bus.rs

(limited to 'src/components/device_bus.rs')

diff --git a/src/components/device_bus.rs b/src/components/device_bus.rs
new file mode 100644
index 0000000..9854ee9
--- /dev/null
+++ b/src/components/device_bus.rs
@@ -0,0 +1,22 @@
+use crate::*;
+
+
+pub trait DeviceBus {
+    fn read(&mut self, port: u8) -> u8;
+    fn write(&mut self, port: u8, value: u8) -> Option<Signal>;
+    fn wake(&mut self) -> bool;
+}
+
+
+pub trait Device {
+    fn read(&mut self, port: u8) -> u8;
+    fn write(&mut self, port: u8, value: u8) -> Option<Signal>;
+    fn wake(&mut self) -> bool;
+}
+
+impl Device for () {
+    fn read(&mut self, _: u8) -> u8 { 0 }
+    fn write(&mut self, _: u8, _: u8) -> Option<Signal> { None }
+    fn wake(&mut self) -> bool { false }
+}
+
-- 
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