make scram work on T23 (fix issue #85)

1 files changed, 28 insertions, 12 deletions

diff --git a/sys/src/cmd/scram.c b/sys/src/cmd/scram.c
index f61a08841..7bd2299fe 100644
--- a/sys/src/cmd/scram.c
+++ b/sys/src/cmd/scram.c
@@ -1,20 +1,36 @@
 #include <u.h>
 #include </386/include/ureg.h>
-typedef struct Ureg Ureg;
 #include <libc.h>
 
+struct Ureg u;
+int fd;
+
+void
+apm(void)
+{
+	seek(fd, 0, 0);
+	if(write(fd, &u, sizeof u) < 0)
+		sysfatal("write: %r");
+	seek(fd, 0, 0);
+	if(read(fd, &u, sizeof u) < 0)
+		sysfatal("read: %r");
+	if(u.flags & 1)
+		sysfatal("apm: %lux", (u.ax>>8) & 0xFF);
+}
+
 void
 main()
 {
-	Ureg ureg;
-	int fd;
-	
-	fd = open("/dev/apm", OWRITE);
-	if(fd < 0) sysfatal("%r");
-	memset(&ureg, 0, sizeof ureg);
-	ureg.ax = 0x5307;
-	ureg.bx = 0x0001;
-	ureg.cx = 0x0003;
-	ureg.trap = 0x15;
-	write(fd, &ureg, sizeof ureg);
+	if((fd = open("/dev/apm", ORDWR)) < 0)
+		if((fd = open("#P/apm", ORDWR)) < 0)
+			sysfatal("open: %r");
+
+	u.ax = 0x530E;
+	u.bx = 0x0000;
+	u.cx = 0x0102;
+	apm();
+	u.ax = 0x5307;
+	u.bx = 0x0001;
+	u.cx = 0x0003;
+	apm();
 }