Re: Rewriting pca(4) using finetimer(9) (was: Re: MPU401 now worksunder New Midi Driver Framework with a Fine Timer)

1999-07-14 Thread Seigo Tanimura
On Thu, 8 Jul 1999 09:54:42 +0100 (BST), Doug Rabson [EMAIL PROTECTED] said: dfr If I understand this correctly, you are suggesting that we program timer0 dfr so that we only take interrupts when a finetimer is due to fire? If so, dfr then it sounds very good. The idea of taking 6000+

Re: Rewriting pca(4) using finetimer(9) (was: Re: MPU401 now worksunder New Midi Driver Framework with a Fine Timer)

1999-07-14 Thread Seigo Tanimura
On Wed, 14 Jul 1999 15:54:22 +0900, Seigo Tanimura [EMAIL PROTECTED] said: tanimura Thus a callout will have an average delay of 0.5/hz = 50ms. This is 5ms, I mean... Seigo Tanimura [EMAIL PROTECTED] To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-current" in the

Re: Rewriting pca(4) using finetimer(9) (was: Re: MPU401 now worksunder New Midi Driver Framework with a Fine Timer)

1999-07-14 Thread Seigo Tanimura
On Thu, 8 Jul 1999 09:54:42 +0100 (BST), Doug Rabson d...@nlsystems.com said: dfr If I understand this correctly, you are suggesting that we program timer0 dfr so that we only take interrupts when a finetimer is due to fire? If so, dfr then it sounds very good. The idea of taking 6000+

Re: Rewriting pca(4) using finetimer(9) (was: Re: MPU401 now worksunder New Midi Driver Framework with a Fine Timer)

1999-07-14 Thread Seigo Tanimura
On Wed, 14 Jul 1999 15:54:22 +0900, Seigo Tanimura tanim...@naklab.dnj.ynu.ac.jp said: tanimura Thus a callout will have an average delay of 0.5/hz = 50ms. This is 5ms, I mean... Seigo Tanimura tanim...@naklab.dnj.ynu.ac.jp To Unsubscribe: send mail to majord...@freebsd.org with

Re: Rewriting pca(4) using finetimer(9) (was: Re: MPU401 now worksunder New Midi Driver Framework with a Fine Timer)

1999-07-09 Thread Ville-Pertti Keinonen
p...@critter.freebsd.dk (Poul-Henning Kamp) writes: Somebody should study the abilities of the on-cpu APIC for this for pentium ff. machines. The local APIC would work very nicely, but I'm not sure that you can enable it reliably in a non-SMP configuration. AFAIK most BIOSes don't provide an

Re: Rewriting pca(4) using finetimer(9) (was: Re: MPU401 now worksunder New Midi Driver Framework with a Fine Timer)

1999-07-09 Thread Poul-Henning Kamp
But shouldn't you still be able to use the timer in the local apic ? In message 86k8sajlmz@not.demophon.com, Ville-Pertti Keinonen writes: p...@critter.freebsd.dk (Poul-Henning Kamp) writes: Somebody should study the abilities of the on-cpu APIC for this for pentium ff. machines. The

Re: Rewriting pca(4) using finetimer(9) (was: Re: MPU401 now worksunder New Midi Driver Framework with a Fine Timer)

1999-07-09 Thread Ville-Pertti Keinonen
p...@critter.freebsd.dk (Poul-Henning Kamp) writes: But shouldn't you still be able to use the timer in the local apic ? Did you read the last paragraph in my message? Here it is again: It's been a while since I looked at the documentation, but it *might* be possible that the local APIC

Re: Rewriting pca(4) using finetimer(9) (was: Re: MPU401 now worksunder New Midi Driver Framework with a Fine Timer)

1999-07-08 Thread Seigo Tanimura
On Thu, 8 Jul 1999 09:54:42 +0100 (BST), Doug Rabson [EMAIL PROTECTED] said: dfr If I understand this correctly, you are suggesting that we program timer0 dfr so that we only take interrupts when a finetimer is due to fire? If so, dfr then it sounds very good. The idea of taking 6000+

Re: Rewriting pca(4) using finetimer(9) (was: Re: MPU401 now worksunder New Midi Driver Framework with a Fine Timer)

1999-07-08 Thread Julian Elischer
this is problematic. you cannot add a new element before the pending firing because you can't tell how far into the present trigger you are. On Thu, 8 Jul 1999, Doug Rabson wrote: On Thu, 8 Jul 1999, Seigo Tanimura wrote: On Wed, 7 Jul 1999 19:46:38 -0700 (PDT), Julian Elischer

Re: Rewriting pca(4) using finetimer(9) (was: Re: MPU401 now worksunder New Midi Driver Framework with a Fine Timer)

1999-07-08 Thread Seigo Tanimura
On Thu, 8 Jul 1999 09:54:42 +0100 (BST), Doug Rabson d...@nlsystems.com said: dfr If I understand this correctly, you are suggesting that we program timer0 dfr so that we only take interrupts when a finetimer is due to fire? If so, dfr then it sounds very good. The idea of taking 6000+

Re: Rewriting pca(4) using finetimer(9) (was: Re: MPU401 now worksunder New Midi Driver Framework with a Fine Timer)

1999-07-08 Thread Doug Rabson
On Thu, 8 Jul 1999, Seigo Tanimura wrote: On Thu, 8 Jul 1999 09:54:42 +0100 (BST), Doug Rabson d...@nlsystems.com said: dfr If I understand this correctly, you are suggesting that we program timer0 dfr so that we only take interrupts when a finetimer is due to fire? If so, dfr then it

Re: Rewriting pca(4) using finetimer(9) (was: Re: MPU401 now worksunder New Midi Driver Framework with a Fine Timer)

1999-07-08 Thread Bruce Evans
dfr If I understand this correctly, you are suggesting that we program timer0 dfr so that we only take interrupts when a finetimer is due to fire? If so, dfr then it sounds very good. The idea of taking 6000+ interrupts/sec made me dfr uneasy, even though most would return without doing any work.

Re: Rewriting pca(4) using finetimer(9) (was: Re: MPU401 now worksunder New Midi Driver Framework with a Fine Timer)

1999-07-08 Thread Poul-Henning Kamp
Somebody should study the abilities of the on-cpu APIC for this for pentium ff. machines. In message 199907081527.baa04...@godzilla.zeta.org.au, Bruce Evans writes: dfr If I understand this correctly, you are suggesting that we program timer0 dfr so that we only take interrupts when a finetimer