From fe7ae6e696811a39828dd9727295aa73ae4e5873 Mon Sep 17 00:00:00 2001
From: crecher <crecher@crecher.net>
Date: Mon, 12 Oct 2026 04:27:53 +0200
Subject: nes: add console with cpu bus and step loop tests: run nestest
 through nes console

---
 nes/bus.go | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100644 nes/bus.go

(limited to 'nes/bus.go')

diff --git a/nes/bus.go b/nes/bus.go
new file mode 100644
index 0000000..480d178
--- /dev/null
+++ b/nes/bus.go
@@ -0,0 +1,21 @@
+package nes
+
+func (n *Console) Read(addr uint16) uint8 {
+	switch {
+	case addr < 0x2000:
+		return n.RAM[addr&0x7FF]
+	case addr >= 0x4020:
+		return n.Cart.Mapper.CPURead(addr)
+	default:
+		return 0
+	}
+}
+
+func (n *Console) Write(addr uint16, v uint8) {
+	switch {
+    case addr < 0x2000:
+    	n.RAM[addr&0x7FF] = v
+    case addr >= 0x4020:
+    	n.Cart.Mapper.CPUWrite(addr, v)
+    }
+}
\ No newline at end of file
-- 
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