From 5e7356f58e28193b5f791a8922abd4e81cf33ab3 Mon Sep 17 00:00:00 2001
From: Jarkko Toivanen <jt@jakest.us>
Date: Fri, 22 Sep 2023 17:42:46 +0300
Subject: [PATCH] VGA driver deprecated

---
 src/vga.c | 97 -------------------------------------------------------
 src/vga.h | 24 --------------
 2 files changed, 121 deletions(-)
 delete mode 100644 src/vga.c
 delete mode 100644 src/vga.h

diff --git a/src/vga.c b/src/vga.c
deleted file mode 100644
index bac204d..0000000
--- a/src/vga.c
+++ /dev/null
@@ -1,97 +0,0 @@
-#include "vga.h"
-#define VGA_WIDTH 80
-#define VGA_HEIGHT 25
-#define VGA_MEM_ADDR 0xb8000
-#define CURSOR_HOME (VGA_HEIGHT-1)*VGA_WIDTH
-#define CURSOR_CHR  177;
-
-unsigned int cursor_loc = CURSOR_HOME;
-unsigned char fgcolor;
-unsigned char bgcolor;
-unsigned short blank;
-
-static unsigned char vga_entry_color(enum vga_color fg, enum vga_color bg) {
-	return fg | bg << 4;
-}
-unsigned short vga_blank_entry() {
-	return vga_entry_color(fgcolor, bgcolor) << 8;
-}
-void draw_cursor(void) {
-	*((unsigned char *)VGA_MEM_ADDR + cursor_loc * 2) = CURSOR_CHR;
-	*((unsigned char *)VGA_MEM_ADDR+1 + cursor_loc * 2) = vga_entry_color(fgcolor, bgcolor);
-}
-
-void vga_set_color(enum vga_color fg, enum vga_color bg) {
-	fgcolor = fg;
-	bgcolor = bg;
-}
-void vga_init(enum vga_color fg, enum vga_color bg) {
-	vga_set_color(fg, bg);
-	blank = vga_blank_entry();
-	cls();
-}
-void cls(void) {
-	int i;
-	for (i=0; i<VGA_HEIGHT*VGA_WIDTH;i++) {
-		*((unsigned short *) VGA_MEM_ADDR+i) = blank;
-	}
-}
-void scroll(void) {
-	int y;
-	int x;
-	*((unsigned short *) VGA_MEM_ADDR+cursor_loc) = blank;
-	for (y=0;y<VGA_HEIGHT;y++) {
-		for (x = 0;x<VGA_WIDTH;x++) {
-			*((unsigned short *) VGA_MEM_ADDR+y*VGA_WIDTH+x) = *((unsigned short *) VGA_MEM_ADDR+(y+1)*VGA_WIDTH+x);
-		}
-	}
-	for (x=0;x<VGA_WIDTH;x++) {
-		*((unsigned short *) VGA_MEM_ADDR+CURSOR_HOME+x) = blank;
-	}
-	cursor_loc = CURSOR_HOME;
-	draw_cursor();
-}
-void putchar(unsigned char chr) {
-	if (chr == '\n') {
-		scroll();
-		return;
-	}
-	*((unsigned char *) VGA_MEM_ADDR+cursor_loc * 2) = chr;
-	*((unsigned char *) VGA_MEM_ADDR+1+cursor_loc * 2) = vga_entry_color(fgcolor, bgcolor);
-	cursor_loc++;
-	if (cursor_loc >= VGA_HEIGHT*VGA_WIDTH) {
-		scroll();
-	}
-	draw_cursor();
-}
-
-void vga_write(const char* text) {
-	int i = 0;
-	while(text[i]) {
-		putchar(text[i]);
-		i++;
-	}
-}
-void vga_write_color( const char* text, enum vga_color fg, enum vga_color bg) {
-	unsigned char prevfg = fgcolor;
-	unsigned char prevbg = bgcolor;
-	vga_set_color(fg, bg);
-	vga_write(text);
-	fgcolor = prevfg;
-	bgcolor = prevbg;
-}
-void vga_write_line(const char* text) {
-	if (cursor_loc != CURSOR_HOME) {
-		scroll();
-	}
-	vga_write(text);
-	scroll();
-}
-void vga_write_line_color(const char* text, enum vga_color fg, enum vga_color bg) {
-	unsigned char prevfg = fgcolor;
-	unsigned char prevbg = bgcolor;
-	vga_set_color(fg, bg);
-	vga_write_line(text);
-	fgcolor = prevfg;
-	bgcolor = prevbg;
-}
diff --git a/src/vga.h b/src/vga.h
deleted file mode 100644
index b2aa979..0000000
--- a/src/vga.h
+++ /dev/null
@@ -1,24 +0,0 @@
-#ifndef HEADER_VGA
-#define HEADER_VGA
-
-enum vga_color {
-	VGA_COLOR_BLACK = 0,
-	VGA_COLOR_BLUE = 1,
-	VGA_COLOR_GREEN = 2,
-	VGA_COLOR_CYAN = 3,
-	VGA_COLOR_RED = 4,
-	VGA_COLOR_MAGENTA = 5,
-	VGA_COLOR_ORANGE = 6,
-	VGA_COLOR_GREY = 7,
-	VGA_COLOR_GRAY = 7,
-};
-
-void cls(void);
-void vga_init(enum vga_color fg, enum vga_color bg);
-
-void vga_write(const char* text);
-void vga_write_color( const char* text, enum vga_color fg, enum vga_color bg);
-void vga_write_line(const char* text);
-void vga_write_line_color( const char* text, enum vga_color fg, enum vga_color bg);
-
-#endif