This discussion has been locked.

You can no longer post new replies to this discussion. If you have a question you can start a new discussion

64K boundaries on DS80C400

While executing the following code:

 char far * buf;
 buf=FARRAY(char, 0x8FFF0);
 printf("%p\r\n",buf);
 buf+=0x100;
 printf("%p\r\n",buf);

I get the following result printed:

x:08fff0
x:0800f0

Obviously, the MSB of the pointer is not updated. Why? Is this a known bug in C51?
Settings: device DS80C400, C51 v7.50, Memory Model Large (variables in XDATA), contiguous mode 16M, 'far' memory type support - checked.

Parents

0 Vitaly Demyanec over 19 years ago in reply to HansBernhard Broeker

Thanks for the answer.
Can you point me where is this behaviour documented (which document, chapter in it)?

> Even the compilers for 16-bit platforms often don't fully support objects straddling 64K boundaries, what did you expect from an 8-bit platform?

I expexted from Keil to outperform those undecent compilers. :-)
Cancel
Vote up 0 Vote down

Cancel

Reply

0 Vitaly Demyanec over 19 years ago in reply to HansBernhard Broeker

Thanks for the answer.
Can you point me where is this behaviour documented (which document, chapter in it)?

> Even the compilers for 16-bit platforms often don't fully support objects straddling 64K boundaries, what did you expect from an 8-bit platform?

I expexted from Keil to outperform those undecent compilers. :-)
Cancel
Vote up 0 Vote down

Cancel

Children

No data