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How can I access a device using phisical address in win95?
Posted on 1998-08-03
I have made a PC card (ISA bus) composed of a dual port ram.
I need to read and write the ram in my app which is coded using MFC in WIN95
I know that I can access the ram directly In MS-DOS. For example to write
10 at adress 0x08000 where the ram is mapped
unsigned int * a = ox08000;
(*a) = 10;
but I don't know how to do it in WIN95 using MFC
Please, help me to solve that problem
Thank you
I need to read and write the ram in my app which is coded using MFC in WIN95
I know that I can access the ram directly In MS-DOS. For example to write
10 at adress 0x08000 where the ram is mapped
unsigned int * a = ox08000;
(*a) = 10;
but I don't know how to do it in WIN95 using MFC
Please, help me to solve that problem
Thank you
[X]
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3 Comments
If you change to using IO mapping, access to your dual port RAM is much simpler under '95. Also, it is quite antisocial to reserve chunks of ISA high memory.
I don't think you can do this in Ring 3 (user app level) code in Win95.
You need to write Ring 0 code which means a VxD or device driver.
For tools for a quick start check out
http://www.vireo.com
You need to write Ring 0 code which means a VxD or device driver.
For tools for a quick start check out
http://www.vireo.com
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