ACPI mode on single CPU mainboard in APIC mode

Ashkenazy · Post by **Ashkenazy** » Thu Jan 30, 2003 7:11 am

I have a mainboard that supports APIC mode, so I installed ACPI Mode, because this should be possible.
The scope platform registration dialog keeps appearing. When I install in Standard PC mode the registration dialog doesn't appear anymore, but it shouldn't be necessairy to install in Standard PC mode, because my mainboard supports APIC.
What can I do about this problem?

sandrob · Post by **sandrob** » Thu Jan 30, 2003 7:57 am

i had the same problem then i instal xp in standard pc mode and solve problem forewer. in the meantime i found that my board supporting apic. what now?!?!
is it any reason to update computer to acpi if i working on the rock solid system with a 4ms latency (3ms possible too) without any even minor problem??
i think theres no reason to do that

Ashkenazy · Post by **Ashkenazy** » Thu Jan 30, 2003 8:07 am

Is it good to assign the IRQ settings in the bios manually to the PCI slot's? For example, IRQ 9 to the PCI Slot with the Creamware card? And other PCI slots to other IRQ slot's? So that there's no IRQ sharing problem?

<font size=-1>[ This Message was edited by: Ashkenazy on 2003-01-30 08:09 ]</font>

Ashkenazy · Post by **Ashkenazy** » Thu Jan 30, 2003 8:08 am

Is it good to assign the IRQ settings in the bios manually to the PCI slot's? For example, IRQ 9 to the PCI Slot with the Creamware card? And other PCI slots to other IRQ slot's? So that there's no IRQ sharing problem?

sandrob · Post by **sandrob** » Thu Jan 30, 2003 8:40 am

if pulsar share irq then you can change sharing in bios. #9irq for cw cards is ok. if you have more than one cw cards, put them on the same (#9)irq.

Ashkenazy · Post by **Ashkenazy** » Thu Jan 30, 2003 8:54 am

Thanks sandrob. Will this assigning of IRQ's in the BIOS also solve the ACPI problem, because now the IRQ is no longer shared by other aplications?
When I assign IRQ 9 to the Creamware card, can I be sure that it won't be shared with other programs?

<font size=-1>[ This Message was edited by: Ashkenazy on 2003-01-30 10:02 ]</font>

Ashkenazy · Post by **Ashkenazy** » Fri Jan 31, 2003 1:56 am

I've read this somewhere: "Installing Windows XP as a "Standard PC" on an APIC compatible computer will probably result in reduced performance and a reduction with overall reliability.".

s1m0nE · Post by **s1m0nE** » Tue May 06, 2003 10:51 am

just changed motherboard (asus fried bios) to a gigabyte 8inxp , can't find the place where to switch off apic mode, running in acpi in win xp gives me 24 irq 's , so its definitely compatible, the bios when assigning manually irq 's however only gives me 16. whats going on? how do i also cure the serious midi recording latency problem under acpi; even at 3ms latency my midi notes are 1/16 off where i should have recorded them.

i know standard pc mode cures this , but if i can't tell my motherboard to operate under the same conditions, how am i going to avoid reliability problems?

tests have shown that when starting cubase sx under acpi mode the cpu meter shows zero.

in standard pc mode it straight away shows 5 - 10% even before opening a project.

will aspi 4.71a2 help?

all said and done, the pulsar card dosen't share irq's with anything else, its just this darn midi recording thing that screws it up for me.

hope someone knows the answers....

orbita · Post by **orbita** » Mon May 26, 2003 6:31 am

i think that midi problem is a know cubase bug that people on steinberg.net forums have been complaining about for ages.