NASM - The Netwide Assembler

NASM Forum => Programming with NASM => Topic started by: nobody on February 27, 2005, 09:33:50 PM

Title: IO ports
Post by: nobody on February 27, 2005, 09:33:50 PM

When I try to compile a file where I read in from port 0x3f5, NASM tells me that  unsigned byte value exceeds bounds.

Title: Re: IO ports
Post by: Frank Kotler on February 28, 2005, 05:20:38 AM

Well... 0x3F5 won't fit in a signed byte... or an unsigned byte, either. The value read may or may not fit in a signed byte. Question is, why does Nasm *think* it should fit in a signed byte? Can we see the code?

Best,
Frank

Title: Re: IO ports
Post by: nobody on May 05, 2005, 03:20:38 AM

The instruction you want just don't exist. Try this instead:

mov dx, 0x3f5
in al, dx