From 0e70a37f56a5415788da1bd377ad66164ae43a4f Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Fri, 11 Dec 1992 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 1992-12-11

---
 pc/fns.h |  2 ++
 pc/l.s   | 22 ++++++++++++++++++++++
 pc/mem.h |  2 +-
 3 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/pc/fns.h b/pc/fns.h
index fa1e15147f57400b0052bd36f7edee03fea8d904..6553720c6e27a8386ea5a6b095c7603dd02a2457 100644
--- a/pc/fns.h
+++ b/pc/fns.h
@@ -29,6 +29,7 @@ void	i8042reset(void);
 void	ident(void);
 void	idle(void);
 int	inb(int);
+void	insb(int, void*, int);
 ushort	ins(int);
 void	inss(int, void*, int);
 void	insl(int, void*, int);
@@ -43,6 +44,7 @@ int	modem(int);
 void	mousectl(char*);
 uchar	nvramread(int);
 void	outb(int, int);
+void	outsb(int, void*, int);
 void	outs(int, ushort);
 void	outss(int, void*, int);
 void	outsl(int, void*, int);
diff --git a/pc/l.s b/pc/l.s
index 6f5e79be8911b0a22c4016e013ea3497ad2d2ddb..751a69b2a3f1ffda3160c23fe8610462a4b6e66d 100644
--- a/pc/l.s
+++ b/pc/l.s
@@ -209,6 +209,17 @@ TEXT	inb(SB),$0
 	INB
 	RET
 
+/*
+ *  input a string of bytes from a port
+ */
+TEXT	insb(SB),$0
+
+	MOVL	p+0(FP),DX
+	MOVL	a+4(FP),DI
+	MOVL	c+8(FP),CX
+	CLD; REP; INSB
+	RET
+
 /*
  *  output a byte
  */
@@ -219,6 +230,17 @@ TEXT	outb(SB),$0
 	OUTB
 	RET
 
+/*
+ *  output a string of bytes to a port
+ */
+TEXT	outsb(SB),$0
+
+	MOVL	p+0(FP),DX
+	MOVL	a+4(FP),SI
+	MOVL	c+8(FP),CX
+	CLD; REP; OUTSB
+	RET
+
 /*
  * input a short from a port
  */
diff --git a/pc/mem.h b/pc/mem.h
index 768fbe13d51532352540ecc1ceb6a51c8ca205eb..a8c10f527529ae14a0ff3cc62eb7d38ef20246de 100644
--- a/pc/mem.h
+++ b/pc/mem.h
@@ -100,7 +100,7 @@
  *  virtual MMU
  */
 #define PTEMAPMEM	(1024*1024)	
-#define SEGMAPSIZE	64
+#define SEGMAPSIZE	16
 #define	PTEPERTAB	(PTEMAPMEM/BY2PG)
 #define PPN(x)		((x)&~(BY2PG-1))