Mail Archives: djgpp/1998/03/28/15:31:53
From: | <OneClickAway AT worldnet DOT att DOT net>
|
Newsgroups: | comp.os.msdos.djgpp
|
Subject: | Newbie's problem with internal timer
|
Date: | 28 Mar 1998 19:56:39 GMT
|
Organization: | AT&T WorldNet Services
|
Lines: | 36
|
Message-ID: | <6fjkln$spk@bgtnsc02.worldnet.att.net>
|
NNTP-Posting-Host: | 12.64.126.5
|
To: | djgpp AT delorie DOT com
|
DJ-Gateway: | from newsgroup comp.os.msdos.djgpp
|
I am a newbie to programming 32-bit DOS. I am used to programming 16-bit
DOS, and using memory locations 0000:046C-0000:046F to find the value of
the internal timer. However, when I make a program like this:
#include <sys/farptr.h>
void main(void) {
_farpeekl(0x0000,0x046C);
}
I get a GP Fault when it is run. This is the output the error generates:
Exiting due to signal SIGSEGV
General Protection Fault at eip=000015a8
eax=00000000 ebx=00000000 ecx=0000046c edx=00000000 esi=00000054
edi=0000a2c4
ebp=0004a288 esp=0004a278 program=E:\DJGPP\BIN\TIMER.EXE
cs: sel=00a7 base=832f2000 limit=0005ffff
ds: sel=00b7 base=832f2000 limit=0005ffff
es: sel=00b7 base=832f2000 limit=0005ffff
fs: sel=0000
gs: sel=00c7 base=00000000 limit=ffffffff
ss: sel=00b7 base=832f2000 limit=0005ffff
Call frame traceback EIPs:
0x000015a8
0x00001587
0x00001b12
How can I find the value of the internal timer without getting a GP Fault?
Can I still reprogram the timer frequency by writing to the 8253 control
register?
I don't know if this is important: I am using RHIDE under Windows 95 to
compile the code
- Raw text -