[Tech ARP] BIOS Option Of The Week - Delayed Transaction

news · May 11, 2014

Dear editor,

We have just posted the *BIOS Option Of The Week - Delayed Transaction*.

Quote : Since 1999, we have been developing the BIOS Optimization Guide,

affectionately known as the BOG. From a meagre beginning of a single page,

it now covers over 440 BIOS options. As old BOG readers will know, we

started offering two editions of the BOG since Revision 8.0 - a simplified

edition and the complete edition.

Normally, the complete edition is only available to subscribers who help

sponsor the development of the guide through a small fee. However, that

changes today! From now on, we will post a BIOS option from the complete

edition of the BIOS Optimization Guide every weekend.

This week, we will be taking a look at the *Delayed Transaction* BIOS

setting. Here's an excerpt :

*"To meet PCI 2.1 compliance, the PCI maximum target latency rule must be

observed. According to this rule, a PCI 2.1-compliant device must service a

read request within 16 PCI clock cycles for the initial read and 8 PCI

clock cycles for each subsequent read. If it cannot do so, the PCI bus will

terminate the transaction so that other PCI devices can access the bus. But

instead of rearbitrating for access (and failing to meet the minimum

latency requirement again), the PCI 2.1-compliant device can make use of

the PCI Delayed Transaction feature... "*

Link : *http://www.techarp.com/showarticle.aspx?artno=606*<http://www.techarp.com/showarticle.aspx?artno=606>

Icon : *http://www.techarp.com/article/BOG_Weekly/BOG_weekly_big.png*<http://www.techarp.com/article/BOG_Weekly/BOG_weekly_big.png>

We hope you will post this news on your website. Please feel free to send

your news to news ( -at -) techarp.com and we will reciprocate.

Thanks!

*Team ARP*

Tech ARP : *http://www.techarp.com/* <http://www.techarp.com/>

Tech ARP : *http://techarp.com/* <http://techarp.com/>

--

Recommended Posts