From abaab98bd757cd0818cfcddc983eee25ab7672ed Mon Sep 17 00:00:00 2001
From: EmulatedSeasons <89668582+EmulatedSeasons@users.noreply.github.com>
Date: Tue, 7 May 2024 11:07:03 -0400
Subject: Made framebuffer class, serial write functions, and finally got
 makefile to build without having to make clean

---
 kernel/arch/x86_64/serial.cpp | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 kernel/arch/x86_64/serial.cpp

(limited to 'kernel/arch/x86_64/serial.cpp')

diff --git a/kernel/arch/x86_64/serial.cpp b/kernel/arch/x86_64/serial.cpp
new file mode 100644
index 0000000..e90bcde
--- /dev/null
+++ b/kernel/arch/x86_64/serial.cpp
@@ -0,0 +1,23 @@
+#include <io.h>
+#include <string.h>
+
+#define PORT 0x3f8
+
+int is_transmit_empty() {
+    return inb(PORT + 5) & 0x20;
+}
+
+extern "C" void serial_putchar(char c) {
+    while (is_transmit_empty() == 0);
+    outb(PORT, c);
+}
+
+void serial_write(const char* data, size_t size) {
+    for (size_t i = 0; i < size; i++) {
+        serial_putchar(data[i]);
+    }
+}
+
+void serial_writestring(const char* data) {
+    serial_write(data, strlen(data));
+}
\ No newline at end of file
-- 
cgit v1.2.3-70-g09d2