diff options
| -rw-r--r-- | sys/src/cmd/scram.c | 40 |
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(); } |