summaryrefslogtreecommitdiff
path: root/i386/pc/putchar.c
diff options
context:
space:
mode:
Diffstat (limited to 'i386/pc/putchar.c')
-rw-r--r--i386/pc/putchar.c96
1 files changed, 96 insertions, 0 deletions
diff --git a/i386/pc/putchar.c b/i386/pc/putchar.c
new file mode 100644
index 0000000..d5b106c
--- /dev/null
+++ b/i386/pc/putchar.c
@@ -0,0 +1,96 @@
+/*
+ * Copyright (c) 1995-1994 The University of Utah and
+ * the Computer Systems Laboratory at the University of Utah (CSL).
+ * All rights reserved.
+ *
+ * Permission to use, copy, modify and distribute this software is hereby
+ * granted provided that (1) source code retains these copyright, permission,
+ * and disclaimer notices, and (2) redistributions including binaries
+ * reproduce the notices in supporting documentation, and (3) all advertising
+ * materials mentioning features or use of this software display the following
+ * acknowledgement: ``This product includes software developed by the
+ * Computer Systems Laboratory at the University of Utah.''
+ *
+ * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
+ * IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
+ * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ *
+ * CSL requests users of this software to return to csl-dist@cs.utah.edu any
+ * improvements that they make and grant CSL redistribution rights.
+ *
+ * Author: Bryan Ford, University of Utah CSL
+ */
+
+#include <mach/machine/eflags.h>
+
+#include "real.h"
+
+#ifndef ENABLE_IMMCONSOLE
+
+#include <rc.h>
+int putchar(int c)
+{
+
+ if (c == '\n')
+ putchar('\r');
+
+ {
+#if RCLINE >= 0
+ static int serial_inited = 0;
+ if (! serial_inited) {
+ init_serial();
+ serial_inited = 1;
+ }
+ serial_putc(c);
+#else
+ struct real_call_data rcd;
+ rcd.eax = 0x0e00 | (c & 0xff);
+ rcd.ebx = 0x07;
+ rcd.flags = 0;
+ real_int(0x10, &rcd);
+#endif
+ }
+
+ return 0;
+}
+
+#else ENABLE_IMMCONSOLE
+
+void
+putchar(unsigned char c)
+{
+ static int ofs = -1;
+
+ if (ofs < 0)
+ {
+ ofs = 0;
+ putchar('\n');
+ }
+ if (c == '\r')
+ {
+ ofs = 0;
+ }
+ else if (c == '\n')
+ {
+ bcopy(0xb8000+80*2, 0xb8000, 80*2*24);
+ bzero(0xb8000+80*2*24, 80*2);
+ ofs = 0;
+ }
+ else
+ {
+ volatile unsigned char *p;
+
+ if (ofs >= 80)
+ {
+ putchar('\r');
+ putchar('\n');
+ }
+
+ p = (void*)0xb8000 + 80*2*24 + ofs*2;
+ p[0] = c;
+ p[1] = 0x0f;
+ ofs++;
+ }
+}
+
+#endif ENABLE_IMMCONSOLE