+ while (!serial_havechar()) ;
+ return (int)inb(IOBASE);
+}
+
+/* These are thinly veiled vt100 functions used by curses */
+
+#define VT100_CLEAR "\e[H\e[J"
+/* These defines will fail if you use bold and reverse at the same time.
+ * Switching off one of them will switch off both. tinycurses knows about
+ * this and does the right thing.
+ */
+#define VT100_SBOLD "\e[1m"
+#define VT100_EBOLD "\e[m"
+#define VT100_SREVERSE "\e[7m"
+#define VT100_EREVERSE "\e[m"
+#define VT100_CURSOR_ADDR "\e[%d;%dH"
+#define VT100_CURSOR_ON "\e[?25l"
+#define VT100_CURSOR_OFF "\e[?25h"
+/* The following smacs/rmacs are actually for xterm; a real vt100 has
+ enacs=\E(B\E)0, smacs=^N, rmacs=^O. */
+#define VT100_SMACS "\e(0"
+#define VT100_RMACS "\e(B"
+/* A vt100 doesn't do color, setaf/setab below are from xterm-color. */
+#define VT100_SET_COLOR "\e[3%d;4%dm"
+
+static void serial_putcmd(char *str)
+{
+ while(*str)
+ serial_putchar(*(str++));
+}
+
+void serial_clear(void)
+{
+ serial_putcmd(VT100_CLEAR);
+}
+
+void serial_start_bold(void)
+{
+ serial_putcmd(VT100_SBOLD);
+}
+
+void serial_end_bold(void)
+{
+ serial_putcmd(VT100_EBOLD);
+}
+
+void serial_start_reverse(void)
+{
+ serial_putcmd(VT100_SREVERSE);
+}
+
+void serial_end_reverse(void)
+{
+ serial_putcmd(VT100_EREVERSE);
+}
+
+void serial_start_altcharset(void)
+{
+ serial_putcmd(VT100_SMACS);
+}
+
+void serial_end_altcharset(void)
+{
+ serial_putcmd(VT100_RMACS);
+}
+
+/**
+ * Set the foreground and background colors on the serial console.
+ *
+ * @param fg Foreground color number.
+ * @param bg Background color number.
+ */
+void serial_set_color(short fg, short bg)
+{
+ char buffer[32];
+ snprintf(buffer, sizeof(buffer), VT100_SET_COLOR, fg, bg);
+ serial_putcmd(buffer);
+}
+
+void serial_set_cursor(int y, int x)
+{
+ char buffer[32];
+ snprintf(buffer, sizeof(buffer), VT100_CURSOR_ADDR, y + 1, x + 1);
+ serial_putcmd(buffer);
+}
+
+void serial_cursor_enable(int state)
+{
+ if (state)
+ serial_putcmd(VT100_CURSOR_ON);
+ else
+ serial_putcmd(VT100_CURSOR_OFF);