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1 files changed, 40 insertions, 0 deletions

diff --git a/include/garmos/vga.h b/include/garmos/vga.h
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+++ b/include/garmos/vga.h
@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2017 Robin Krahl <robin.krahl@ireas.org>
+ * 
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation, either version 3 of the License, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ */
+
+#ifndef GARMOS_VGA_H
+#define GARMOS_VGA_H
+
+#include <garmos/types.h>
+
+/*
+ * VGA text mode is only supported if ENABLE_VGA is defined, usually in the
+ * architecture's config.mk.  For VGA_MEMORY, VGA_ROWS and VGA_COLS, sensible
+ * defaults are chosen.  If these default values do not apply, the correct
+ * values should be set in the architecture's config.mk.
+ */
+
+#ifndef VGA_ROWS
+#define VGA_ROWS 20
+#endif
+
+#ifndef VGA_COLS
+#define VGA_COLS 80
+#endif
+
+void vga_clear(void);
+void vga_pclear(uint8_t attr);
+void vga_print(uint32_t row, uint32_t col, uint8_t c);
+void vga_pprint(uint32_t row, uint32_t col, uint8_t attr, uint8_t c);
+
+#endif