IO ports

[nobody]

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

[Frank Kotler]

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

[nobody]

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

mov dx, 0x3f5
in al, dx