From 76cea79a46d42f8f59503d3bb421f0d298da66cb Mon Sep 17 00:00:00 2001
From: Melodi <62381002+Melodi17@users.noreply.github.com>
Date: Thu, 28 Aug 2025 21:57:33 +1000
Subject: implemented standard library

---
 ROMs/lib.c | 52 +++++++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 49 insertions(+), 3 deletions(-)

(limited to 'ROMs/lib.c')

diff --git a/ROMs/lib.c b/ROMs/lib.c
index 32378c0..cd666b9 100644
--- a/ROMs/lib.c
+++ b/ROMs/lib.c
@@ -1,7 +1,34 @@
+#define SK_MAX 256
+#define SK_NL 13
+#define SK_BS 8
+#define SK_SHIFT 160
+#define SK_A 65
+#define SK_B 66
+#define SK_C 67
+#define SK_D 68
+#define SK_E 69
+
+#define MS_LEFT 1
+#define MS_RIGHT 2
+#define MS_MIDDLE 4
+
+#define SCREEN_WIDTH 128
+#define SCREEN_HEIGHT 64
+#define SCREEN_MAX 128 * 64
+
+#define true 1
+#define false 0
+
+#define COLOR_BLACK 8
+#define COLOR_RED 1
+#define COLOR_GREEN 2
+#define COLOR_BLUE 3
+#define COLOR_TRANSPARENT 0
+
 int setPixel(int x, int y, int c)
 {
     char* screenStart = 0x402F;
-    int i = (y * 128) + x;
+    int i = (y * SCREEN_WIDTH) + x;
     screenStart[i] = c;
 }
 
@@ -14,8 +41,7 @@ int setPixel(int i, int c)
 int clear(int c)
 {
     char* screenStart = 0x402F;
-    char screenSize = 64 * 128;
-    for (int i = 0; i < screenSize; i++)
+    for (int i = 0; i < SCREEN_MAX; i++)
     {
         screenStart[i] = c;
     }
@@ -31,6 +57,26 @@ int getKeyState(int scanCode)
     return (val & (1 << bit)) != 0;
 }
 
+int getPressedKey()
+{
+    for (int sk = 0; sk < SK_MAX; sk++)
+    {
+        if (getKeyState(sk) && sk != SK_SHIFT)
+            return sk;
+    }
+    return 0;
+}
+
+int readKey()
+{
+    while (true)
+    {
+        int sk = getPressedKey();
+        if (sk != 0)
+            return sk;
+    }
+}
+
 int getMouseIndex()
 {
     return *(0x602F);
-- 
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