[syslinux] Req: download timer

[H. Peter Anvin]

On 03/16/2010 09:45 AM, Gene Cumm wrote:
>
> Well, the lack of a precision timer in the Syslinux COM32 library may
> present issues.  The only thing I see is the times() function, which
> returns the clock count (around 18.2 ticks per second; I think 55ms
> per cycle).  hpa made reference to INT 1Ah in the declaration of this
> function however it still only looks at the same data.  There might be
> a possibility of accessing the CMOS RTC via INT 70h (at I believe 1024
> Hz) but I believe that would require writing and installing an ISR.
>
> Aside from that, it's a simple matter of copying a file, discarding
> the data as you go.  Such a COM32 module could be used by any variant.
>

Can you really make a claim of needing more than 55 ms accuracy for the 
download time?  There are a number of ways to get higher precision on 
commodity hardware, but it's complicated.

	-hpa