From da1ab4d6ff5e98a02b20815f2fabc8e82311789f Mon Sep 17 00:00:00 2001
From: Tom-on64 <kubecekt@gmail.com>
Date: Fri, 19 Apr 2024 14:10:45 +0200
Subject: [PATCH] Added cursor rendering (kinda badly, will delete any
 characters under it)

---
 include/screen.h | 2 ++
 include/timer.h  | 8 +++++++-
 src/kernel.c     | 2 +-
 3 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/include/screen.h b/include/screen.h
index dc9772a..7364169 100644
--- a/include/screen.h
+++ b/include/screen.h
@@ -48,9 +48,11 @@ void printAt(const char* str, uint32_t x, uint32_t y) {
 
 void putc(char c) {
     if (c == '\n') {
+        putcAt(' ', cursor.x, cursor.y); // Make sure we don't leave an extra cursor
         cursor.y++;
         cursor.x = 0;
     } else if (c == '\b') {
+        putcAt(' ', cursor.x, cursor.y); // Make sure we don't leave an extra cursor TODO: make this better
         cursor.x--;
         putcAt(' ', cursor.x, cursor.y);
     } else {
diff --git a/include/timer.h b/include/timer.h
index 0e51377..633e09b 100644
--- a/include/timer.h
+++ b/include/timer.h
@@ -6,12 +6,18 @@
 #include "irq.h"
 #include "system.h"
 
+#include "screen.h"
+
 #define INPUT_CLK 1193180
 
 uint32_t timerTicks = 0;
 
 void timerHandler() {
     timerTicks++;
+
+    // TODO: Improve the cursor rendering
+    if (timerTicks % 500 == 0) putcAt(127, cursor.x, cursor.y);
+    else if (timerTicks % 250 == 0) putcAt(' ', cursor.x, cursor.y);
 }
 
 void setupTimer() {
@@ -30,7 +36,7 @@ void timerPhase(uint32_t hz) {
 void sleep(uint32_t ticks) {
     uint32_t eticks = ticks + timerTicks;
     
-    while (timerTicks != eticks); // Should avoid overflows unlike '<'
+    while (timerTicks != eticks); // Should ignore overflows unlike '<'
 }
 
 
diff --git a/src/kernel.c b/src/kernel.c
index 188e040..a7fcf7e 100644
--- a/src/kernel.c
+++ b/src/kernel.c
@@ -22,7 +22,7 @@ void main() {
 
     setupKeyboard();
     setupTimer();
-    timerPhase(100); // 1 tick per 10ms
+    timerPhase(1000); // 1 tick per ~1ms
 
     // Screen setup
     diskRead(25, 4, (char*)0x6000); // Read font from disk