PureBasic Forums - English

Hi all,

how can i use the IN and OUT asm commands within PB ?

(Example)

Procedure ATA_IDENTIFY_DRIVE()
MOV DX, 1F7h
IN AL,DX
EndProcedure

(IN AL,DX is reported as illegal instruction !!
Any idea how to address the IDE controller directly ?)

Did you enable ASM in the compiler?

Yes

MOV DX, 1F7h is accepted ! (but not IN AL,DX)

Hi TeddyLM,

Just and Ideal like that...Maybe the register DX is for WORD value And AL is Byte!

Roger

Hi VPureBasic

i don't think it's the problem here !
found on the Net :

...
In x86 assembler you use in( ) and out( ) instructions. They move single bytes. There is also inw( ) and outw( ) for moving 16 bit words
The format of the instructions are <instruction name> ( target, source ) Target and source are a port address or data
NOTE: For port addresses below 0x100h you can directly use the port address as a number.
For port addresses above 0xffh you have to load the address into the DX register
Examples:
mov dx, 379h
in al, dx (Reads port 0x379h -LPT1 status register- into al register)
...

Have you tried to pass it directly to FASM by using the '!' operator, like this:

Yes

nothing changed !
Are these commands prohibited in FASM for windows ?

Ok, i missunderstood you, i thought that the compiler complained. I'm pretty sure that on win2k & XP you're not allowed to mess directly with a port, be it com or lpt, you must do it through a driver.

Pupil wrote:I'm pretty sure that on win2k & XP you're not allowed to mess directly with a port, be it com or lpt, you must do it through a driver.

That's correct.

looks like i'll have to use CreateFile and DeviceIOControl API functions !

thanks for the help anyway

Did somebody write something to get access to device sectors ?

Check out http://www.purearea.net/ and search for "IO_DLL_WRAPPER".

That's interresting !

Thank you