error in paging page ?

[stdcall]

In http://wiki.osdev.org/Paging#Manipulation

I think the following line is wrong here:

Code: Select all

    unsigned long * pt = ((unsigned long *)0xFFC00000) + (0x400 * pdindex);

I think it needs to be

Code: Select all

    unsigned long * pt = ((unsigned long *)0xFFC00000) + (0x1000 * pdindex);

Am I wrong ?

[Techel]

When adding to pointers the offset is multiplied by the pointee's size:

Code: Select all

int *p = ...
p += 5; //adds 5*sizeof(int)

short *p = ...
p += 3; //add 3*sizeof(short)

[stdcall]

You're right I missed a parenthesis. thought the the casting to unsigned long * was after the multiplication.