| Title: | MS Windows NT Developers |
| Notice: | See note 1222 for MS bug reporting info |
| Moderator: | TARKIN::LIN EIBER |
| Created: | Mon Nov 11 1991 |
| Last Modified: | Tue Jun 03 1997 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 3247 |
| Total number of notes: | 15633 |
Is there a plan for making Windows NT available on Alpha in native (64-bit) mode? If so, when might it be available? thanks,
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 3232.1 | GEMEVN::GLOSSOP | Kent Glossop | Thu May 01 1997 14:56 | 6 | |
What exactly do you mean by "native mode"? All of the OS is fully native code, while applications vary. There is an __int64 type that can be used in C/C++ to manipulate 64b data if long as 32b isn't sufficient. Do you mean the ability to use 64b pointers in native code to get more than 2Gb of process memory? Something else? | |||||
| 3232.2 | BHAJEE::JAERVINEN | Ora, the Old Rural Amateur | Thu May 01 1997 17:43 | 3 | |
The Windows NT conference should have a lot of topics discussing
"64-bitness". Look for VLM.
| |||||
| 3232.3 | TLE::ALEXANDER | Jack | Mon May 05 1997 15:57 | 11 | |
re: .2 thanks for the pointer to other discussions on the subject. I'll check it out. The white paper in 5442.0 looks like what I wanted. re: .1 Can an application use a 64 bit pointer just like a 'real' pointer? Which operations are avilable for 64 bit integers? Are there other integer sizes, between 32 and 64, that can be used? Is there ability to access files graeter than 4GB today? thanks, | |||||
| 3232.4 | DECCXL::OUELLETTE | mudseason into blackfly season | Mon May 05 1997 17:33 | 38 | |
> Can an application use a 64 bit pointer just like a 'real' pointer?
Yes. If you have VC++ V5.0, you can try with something like:
#include <stdio.h>
int * __ptr64 p = 0;
int * small_p = (int *) 0x1234;
struct S
{
char c;
int * __ptr64 p;
} s = { 1 };
void main(void)
{
printf("%.16I64x\n", (__int64) s.p);
s.p--;
printf("%.16I64x\n", (__int64) s.p);
p = small_p;
printf("%.16I64x\n", (__int64) p);
p += 0x100000000;
printf("%.16I64x\n", (__int64) p);
}
> Which operations are avilable for 64 bit integers?
All of them. They act just like char, short, int and long.
> Are there other integer sizes, between 32 and 64, that can be used?
None built in. If a user wants to make a struct with (say) 48 bit and
write the C++ operators, they could implement it. The compiler itself
knows about 1, 2, 4 and 8 byte long integers.
> Is there ability to access files graeter than 4GB today?
Ask the OS people.
| |||||
| 3232.5 | DECWET::SCHREIBER | DECeNT | Mon May 05 1997 19:16 | 4 | |
Is there ability to access files graeter than 4GB today?
Yes. NT has supported files greater than 4GB for a long time. This is
covered in the documentation.
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