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make scram work on T23 (fix issue #85)

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This commit is contained in:
cinap_lenrek 2011-08-24 06:31:23 +02:00
parent 4593680a05
commit 94fd5b32e9
1 changed files with 28 additions and 12 deletions
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40
sys/src/cmd/scram.c
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@ -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();
}