Re: Promise/IDE

1999-08-05 Thread Soren Schmidt
It seems Mike Hoskins wrote: > and I just installed a Promise Ultra66. Here's my relevant kernel config > stuff (following LINT's example): > > pci0: unknown card DBZ4d38 (vendor=0x105a, dev=0x4d38) at 14.0 irq 9 Thats the promise controller, try the ata driver instead an use the following patc

Re: IDE_DELAY

1999-07-24 Thread Soren Schmidt
It seems Thomas Schuerger wrote: > Hi! > > I've set the option > > IDE_DELAY=1500 > > and compiled and installed my kernel (I even did config -r > before that), but when booting, the IDE driver still waits > for about half a minute before continuing, instead for > about 1.5 seconds. Has anyon

Re: IBM-DJNA drives on FreeBSD

1999-07-05 Thread Soren Schmidt
It seems Peter Wemm wrote: > > Well, CAM & ATAPI is "fairly" easy, the only problem being all the > > little details that are different enough to make it non-trivial to > > maintain. I once sat down and tried to get all the details on how > > the CCB's where different, and decided that I wouldn't

Re: IBM-DJNA drives on FreeBSD

1999-07-05 Thread Soren Schmidt
It seems Nick Hibma wrote: > > > I should have said "known bad configuration". I know Søren's ATA > > > driver supports UDMA on the Aladdin, but I don't have the luxury of > > > expendable file systems, so I don't use it. I also think it's the > > > wrong direction to go off in; if we're going

Re: IBM-DJNA drives on FreeBSD

1999-07-05 Thread Soren Schmidt
It seems Dag-Erling Smorgrav wrote: > "Brian F. Feldman" <[EMAIL PROTECTED]> writes: > > On 4 Jul 1999, Dag-Erling Smorgrav wrote: > > > Depends on your motherboard. Try to just disable UDMA66 first. If that > > > doesn't help, or if you have a "known bad" chipset (e.g. AcerLabs > > > Aladdin), di

Re: IBM-DJNA drives on FreeBSD

1999-07-04 Thread Soren Schmidt
It seems Dag-Erling Smorgrav wrote: > Richard Tobin <[EMAIL PROTECTED]> writes: > > Is that relevant for 3.2 as well as current? And by "disabling ultra > > DMA" did you mean "disabling UDMA66" or "disabling UDMA completely"? > > (You can permanently disable UDMA66 with a DOS utility available >

Re: Something weird happening w/ SMP -current

1999-07-02 Thread Soren Schmidt
It seems Matthew Dillon wrote: > > Here's some more info. If the dd is stuck and systat -vm 1 is showing > no interrupts occuring on, for example, ahc2 (irq17), and I then do > something that causes an interrupt to occur on mux (irq19), which I > guess is ahc1, ahc2 then starts

Re: -current problems

1999-06-09 Thread Soren Schmidt
It seems John Sconiers wrote: > > I'm running 4.0-current using a snapshot(not using PAO) from 5-20-99 on a > dell Latitude. I installed over 3.2 and it works fine. I attempted to > build a new kernel. The kernel config and make went ok however the make > install caused the machine to crash an

Re: Problem with ATA/ATAPI driver new version (update8)

1999-05-20 Thread Soren Schmidt
It seems Valentin Shopov wrote: > > > > Hmm, sounds like it has trouble talking to the disk, > > try changeing the > > two #if 0's in ata-disk.c so that it uses 16 bit > > transfers.. > > If that fails, try to make it only use singlesector > > transfers, quite > > a lot older disks messes up there

Re: Problem with ATA/ATAPI driver new version (update8)

1999-05-20 Thread Soren Schmidt
It seems Valentin Shopov wrote: > I just tried the new ATA driver on my old ISA only > notebook. > After correct recognition of the hard disk: > > > ad0: invalid primary partition table: no magic > error 22: panic:. Hmm, sounds like it has trouble talking to the disk, try changeing the

UPDATE8: : ATA/ATAPI driver new version available.

1999-05-20 Thread Soren Schmidt
Eigth update to the new ATA/ATAPI driver: Fixed problems: LS120/ZIP drives still currupted data. Reworked once again, buffered I/O is just ignoring any sizehints it is given :( Now the atapifd driver splits up requests for devices that has limitted transfer si

Re: ATA and afd (LS-120): got it WORKING!

1999-05-18 Thread Soren Schmidt
It seems Mike Smith wrote: > > > > No, it does not work at all with that maximum set. I'm using the disk to > > hold > > an FFS filesystem, and mounting it, BTW. See, in the old driver, it limited > > the transfer, but it ALSO queued the rest of the transfer. AFD doesn't, and > > I can tell this

Re: ATA and afd (LS-120): got it WORKING!

1999-05-18 Thread Soren Schmidt
It seems Brian Feldman wrote: >> It seems Brian Feldman wrote: >> > Yes, I finally got it working! The explanation is in the patch, which I >> > should >> > not need to explain again :) >> >> Hmm, Does it not work as is ?? It works on my LS120 drive, and a couble >> of others. Besides your hack

Re: IDE strangeness

1999-05-17 Thread Soren Schmidt
It seems Brian Feldman wrote: >> It seems Brian Feldman wrote: >> > I'm having two problems with IDE nowadays. >> > >> > 1. ATA doesn't work with LS-120. That's not new. But ATA does seem to >> > crash on >> >me, and there's no dump() so I can't figure out why. > >Reply to my own problem: AT

Re: ATA and afd (LS-120): got it WORKING!

1999-05-17 Thread Soren Schmidt
It seems Brian Feldman wrote: > Yes, I finally got it working! The explanation is in the patch, which I should > not need to explain again :) Hmm, Does it not work as is ?? It works on my LS120 drive, and a couble of others. Besides your hack doesn't find my ZIP drive, and makes it fail miserably.

UPDATE7: ATA/ATAPI driver new version available.

1999-05-17 Thread Soren Schmidt
Seventh update to the new ATA/ATAPI driver: Fixed problems: LS120 drives currupted data. The workaround for drives not supporting upto 64K transfers has been reworked. It works now both on LS120 & ZIP drives. ISA only configs wont compile. Fixed. The ATA driv

Re: xl0: couldn't map interrupt ?

1999-05-17 Thread Soren Schmidt
It seems Andrew Gallatin wrote: > > Erwan Arzur writes: > > Recently cvsupped (as of today, and since around may 10) -current > > kernels fail to attach my 3C905-TX nic. > <...> > > ata-pci1: irq 10 at device 5.0 on pci1 > > ata-pci1: Busmastering DMA supported > > <..> > > xl0: <3Com 3c905

Re: IDE strangeness

1999-05-17 Thread Soren Schmidt
It seems Brian Feldman wrote: > I'm having two problems with IDE nowadays. > > 1. ATA doesn't work with LS-120. That's not new. But ATA does seem to crash on >me, and there's no dump() so I can't figure out why. Good news is that I've gotten ahold of a LS120 drive, so I can test this now. Ba

Re: Alladdin IDE slow?

1999-05-15 Thread Soren Schmidt
It seems Kenneth Wayne Culver wrote: > > > > Hmm, this sounds stange, I have a noard here with the Alladin on it on > > which I did the support for the ata driver, it works just fine for me > > at least... > > > Actually, I am having the same sort of problem.. With all the flags set > properly in

Re: New ATA driver still can't attach to ISA controllers

1999-05-15 Thread Soren Schmidt
It seems Brian Feldman wrote: > On Sat, 15 May 1999, Andrew Atrens wrote: > > > > > On Fri, 14 May 1999, Rick Whitesel wrote: > > > > > I just wanted to say that I really appreciate the work you have/are > > > doing. The disk drive performance under IDE is very important for the > > > practi

Re: Alladdin IDE slow?

1999-05-14 Thread Soren Schmidt
It seems Kevin Day wrote: > > I'm using an Alladin chipset in a -current machine... > > ad3 is the one getting the heaviest use, from me... However, I notice a few > things from when I went to the ata driver, from a 3.1 kernel using the wd0 > driver. > > The drive is now much slower... While I d

Re: New ATA driver still can't attach to ISA controllers

1999-05-14 Thread Soren Schmidt
It seems Maxim Sobolev wrote: >Dear Soren, > >Do you remember that currently your famous driver (after new-bus >announcement) don't probed on ISA hardwsre (in my case Toshiba CDX445)? > Yes, and I have the patches right here, I just need to test it a bit more and get the time to commit it (hopefu

Re: cvs commit: src/sys/pci pcisupport.c

1999-05-12 Thread Soren Schmidt
It seems Mike Smith wrote: > > > It is actually true that FreeBSD becomes Linux. > > This is a childish troll, especially coming from you. If for no other > reason, this is an excellent reason _not_ to be working with your team. Oh boy... Could we end this now please ?? We've made our decisi

Re: DMA problems with IBM DeskStar drive

1999-05-12 Thread Soren Schmidt
It seems Dag-Erling Smorgrav wrote: > I have a brand new 10 GB IBM UltrStar (DTTA-371010) which is causing > me some pains. If I boot with flags 0x80ff, everything works fine: Hmm, I have one of those, it works wonderfully with my ata driver... So try to use that instead, it should work then... -

vgl-990112.tgz anybody got it still ??

1999-05-10 Thread Soren Schmidt
I lost that file due to fatfingering a cleanup :) I can see that several people has downloaded it from my ftp-site so does anybody still have it, and could mail/ftp me a copy ?? Thanks -Søren To Unsubscribe: send mail to majord...@freebsd.org with "unsubscribe freebsd-current" in the body of

Re: Problem with the new ATA driver.

1999-05-07 Thread Soren Schmidt
It seems obituary wrote: > The new ATA driver (ata0, atadisk0, atapicd0) gives me a *huge* speed > boost when accessing the harddisk, but I have to sacrifice the use of my > CDROM if I choose to include it. > > The CDROM appears to be detected correctly by the kernel, but when > trying to access t

Re: New ATA driver still can't find my hardware

1999-05-04 Thread Soren Schmidt
It seems Maxim Sobolev wrote: >Dear Soren, > >As of today -current ata driver isn't probed at all (I don't see ad0 >messages when booting kernel and of course it can't mount root), while >wd0 driver works well. >Following is dmesg from my earlier bootable kernel with ata driver. > >FreeBSD 4.0-CUR

Re: ata and IRQ sharing (was: panic in nexus_setup_intr+0x13 with new ata driver)

1999-05-03 Thread Soren Schmidt
It seems Stefan Bethke wrote: > >> > I'm currently trying to get a Promise Ultra/33 to work with Sørens new > >> > ata drivers. > >> > >> I've delved into the code a bit more. The panic results from > >> ata_pciattach() not checking whether an IRQ resource could be allocated. > >> > >> Ths seems

Re: New ATA drivers problem? (Was: New kernels won't boot)

1999-05-02 Thread Soren Schmidt
It seems Stephen Hocking-Senior Programmer PGS Tensor Perth wrote: > Soren, I did a bit of experimenting with my CVS archive and found that > version > 1.8 of ata-all.c was the last one that worked on my problem box. 1.9 spewed > out errors about unexpected interrupts whilst probing and eventual

Re: ep0 *UTP*

1999-05-01 Thread Soren Schmidt
It seems Dag-Erling Smorgrav wrote: > Soren Schmidt writes: > > [...] > > There are lots of better cards out there, but stating that the 3c509 > > doesn't work, is totally out in the dark... > > Well, excuse me for breathing. I'll just take your word, and

Re: ep0 *UTP*

1999-05-01 Thread Soren Schmidt
It seems Dag-Erling Smorgrav wrote: > Alex Zepeda writes: > > On Wed, 28 Apr 1999, Jim Bryant wrote: > > > > Well, I'd chalk it up to buggy 3com h/w myself. Alas I'm still getting: > > > > ep0 XXX: driver didn't set ifq_maxlen > > > I still get that one too. Driver problem? > > I'm guessing so.

Re: New ATA drivers problem? (Was: New kernels won't boot)

1999-04-30 Thread Soren Schmidt
It seems Soren Schmidt wrote: > > > > As I said before, I can make some tests, but unfortunately my machine > > doesn't want to mount disks at all with the new ATA code... Please take a > > look at the message I sent about a week ago. > > Unfortunately they don

Re: New ATA drivers problem? (Was: New kernels won't boot)

1999-04-30 Thread Soren Schmidt
It seems Andrzej Bialecki wrote: > > >Ever going to help with my atapi-fd problems? I found examples of the > > >corruptions, including lots of NULLs... > > > > Well, so long as I cannot get my hands on the problem, its real hard > > to solve it. I'm trying to get ahold of the same LS120 drive her

Re: New ATA drivers problem? (Was: New kernels won't boot)

1999-04-28 Thread Soren Schmidt
It seems Brian Feldman wrote: >Ever going to help with my atapi-fd problems? I found examples of the >corruptions, including lots of NULLs... Well, so long as I cannot get my hands on the problem, its real hard to solve it. I'm trying to get ahold of the same LS120 drive here but so far I havn't

Re: /usr/share/examples/atapi scripts wrong

1999-04-28 Thread Soren Schmidt
It seems Doug White wrote: > Hello ... > > The burn* scripts in /usr/share/examples/atapi try to use wormcontrol for > some reason, which obviously doesn't work. Should we just dump them, or > does someone have one that uses mkisofs/cdrecord that would be > appropriate? What planet are you from

Re: worldstone improvement...

1999-04-28 Thread Soren Schmidt
It seems Tamiji Homma wrote: > > My 2 x 233MHz PPro has improved make world time by about 100 seconds > > out of 5000s = 2 % > > My dual 200MHz PPro worldstone also improved almost 3 minutes > (173 seconds) after Luoqi's SMP change. Yep, I see the same here, good job!! -Søren To Unsubscribe: s

Re: New ATA drivers problem? (Was: New kernels won't boot)

1999-04-28 Thread Soren Schmidt
> Hi, > I have three hosts with -current, all with the new ATA in function. > Booting the same kernel produces different results on all of them wrt > root file system mounting: > > - one reports 'changing root device to wd0s3a' > - one reports 'changing root device to wd0s3a' followed by 'changing

Re: Network problem with Laptop/Current.

1999-04-26 Thread Soren Schmidt
It seems Warner Losh wrote: > In message <199904260643.iaa47...@freebsd.dk> Soren Schmidt writes: > : It works fine with both 3.1 and 4.0-current, the reason it fails now > : is because the pcic/pccard stuff has not been moved to new-bus yet. > : The patches (well 3 oneliners)

Re: Network problem with Laptop/Current.

1999-04-25 Thread Soren Schmidt
It seems NAKAGAWA Yoshihisa wrote: > > PC-Card VLSI 82C146 (5 mem & 2 I/O windows) > > It is probably TI CardBus controller, -current code not support it > correctly. You should be use PAO. It works fine with both 3.1 and 4.0-current, the reason it fails now is because the pcic/pccard stuff has

Re: Network problem with Laptop/Current.

1999-04-25 Thread Soren Schmidt
It seems Edwin Culp wrote: > When I try to configure my D-Link de-660 pcmcia card with a kernel from > sources from the last 5 days or so, I get the following: > > PC-Card VLSI 82C146 (5 mem & 2 I/O windows) > pcic: controller irq 5 > Card inserted, slot 2 > Card inserted, slot 3 > ed0: address 00

Re: New IDE Drivers

1999-04-23 Thread Soren Schmidt
It seems Rick Whitesel wrote: > Hi: > I believe the problems I started having with the new IDE drivers may > be related to the bugs in the SMP IRQ handler described by Roger Hardiman. I > am going to wait until Roger fixes the bug to see if my IDE problem > disappears. I tried the latest dr

Re: New IDE

1999-04-22 Thread Soren Schmidt
It seems Rick Whitesel wrote: > Hi: > I am using /sys/dev/ata/ata-all.c rev 1.11. All this worked just fine > with the new IDE drivers until yesterday. Hmm, wierd, I see no problems here.. Try do a config -r configfile, make depend, make and see if the problem is still there... -Søren To Un

Re: New IDE

1999-04-22 Thread Soren Schmidt
It seems Rick Whitesel wrote: > Hi: > I have been using the new IDE drivers on a ASUS P2B-DS (Dual P II > with Adaptec SCSI) motherboard without any problems until yesterday > afternoon. I noticed that when I booted up yesterday afternoon with the > latest build that I no longer had a IDE C

Temporary fix for PCCARD's to work...

1999-04-22 Thread Soren Schmidt
Below find a quick fix that makes PCCARD work again. Beware that if you have it compiled in the kernel you should remove the kldload in /etc/rc.pccard, as it will happily load the module, and screw up the whole situation... Index: i386/isa/intr_machdep.c ==

Re: New ATA driver and crash dumps

1999-04-22 Thread Soren Schmidt
It seems Brian Feldman wrote: >> Hmm, I have a ZIP here which works, and I have reports from mike that >> his LS120 works too, so I'm a bit confused here. >> How does it not work ?? > >I get consistent errors reading from it (not hard errors, data errors). The >md5 checksums I created on the disk u

Re: New ATA driver and crash dumps

1999-04-22 Thread Soren Schmidt
It seems Brian Feldman wrote: >This and atapi-fd not working are the only hang-ups I have with using ATA. >Heck, the benefits even outweigh that since my new UDMA2 hard drive is only >supported with your wonderful new ATA drivers, not wd! The Aladdin support >works great. > Is there any way I ca

Re: New ATA driver and crash dumps

1999-04-20 Thread Soren Schmidt
It seems Christopher Masto wrote: > My machine panicked today for the first time since switching to the > new ATA drivers, and I noticed that I no longer have crash dumps. > Is this something that is expected to be put back in soon? > > I know Søren's a busy guy, and I'm glad we have the results o

Re: login

1999-04-17 Thread Soren Schmidt
It seems Annelise Anderson wrote: > When I log in to my -current machine (April 13 sources) it takes a > minute or two after the password is entered before the shell prompt > comes up: > > FreeBSD/i386 (andrsn7.stanford.edu) (ttyp0) > > login: xanne > Password: > []<--cursor just stays here for

Re: ATA disks can do command queueing?

1999-04-13 Thread Soren Schmidt
It seems Vallo Kallaste wrote: > On Tue, Apr 13, 1999 at 10:58:45PM +0200, Soren Schmidt > wrote: > > > Yep that is exactly what it means, however the driver in -current > > doesn't take advantage of it yet, but its on my TODO list. > > The reason why I put in t

Re: ATA disks can do command queueing?

1999-04-13 Thread Soren Schmidt
It seems Vallo Kallaste wrote: > Hello ! > > Recently installed March 12 -current snapshot and compiled kernel > with new IDE subsystem. I see interesting lines in dmesg: > ad1: 16 secs/int, 31 depth queue, DMA mode > Does it mean that new ATA disks can queue up commands (something > similar

UPDATE6: ATA/ATAPI driver new version available.

1999-04-10 Thread Soren Schmidt
Sixth update to the new ATA/ATAPI driver: Fixed problems: Promise controllers was not always set up correctly. Parantheses are a good thing, fixed. Some older CDROM's could hang the probe. Proberly wait for the drive to catch its breath after IDENTIFY. Some CD write

Re: make world breakage

1999-04-08 Thread Soren Schmidt
It seems Snob Art Genre wrote: Dont use -jN on the make world, that broke with the EGCS import. > Trying to make world today and last night, with fairly up-to-the-minute > source, I keep bombing out with: > > `/usr/src/gnu/usr.bin/cc/cc_tools/../../../../contrib/egcs/gcc/config/i386/i386. > md'

Re: New SiS 5591 ide chipset support.

1999-04-07 Thread Soren Schmidt
> > OK. Can I assume that you have only one drive on the machine? Have > > you tried a smaller DMA transfer size (say, to start with, > > 0xa001a001)? > > I actually have three drives and a cdrom on the two IDE busses, but it > only seems to complain about the first one - I don't know if that is

Re: make -jn ?

1999-04-05 Thread Soren Schmidt
It seems Bob Bishop wrote: > World builds OK here now, kernel, bootblocks and all. Good job! > > Is `make -jn' safe yet? Could turn these test builds round a lot faster :-) Nope... ===> cc_int make: don't know how to make insn-attrtab.c. Stop *** Error code 2 -Søren To Unsubscribe: send mail

UPDATE5: ATA/ATAPI driver new version available.

1999-03-30 Thread Soren Schmidt
Fifth update to the new ATA/ATAPI driver: Fixed problems: Promise controllers always ended up in PIO mode. A real braino, fixed. Kernel with only ISA bus in it fails to compile. The dependency on NPCI was badly placed, fixed. As usual USE AT YOUR OWN RISK!!, this is stil

Re: UPDATE4: ATA/ATAPI driver new version available.

1999-03-30 Thread Soren Schmidt
It seems Soren Schmidt wrote: > It seems Maxim Sobolev wrote: > > > >New ata driver (cvsup'ed several minutes ago) locks my box solid (only > >reset but ton can help). Bug is fully reproducible on my machine (Toshiba > >Satellite Pro 445). > >I using the foll

Re: UPDATE4: ATA/ATAPI driver new version available.

1999-03-30 Thread Soren Schmidt
It seems Maxim Sobolev wrote: > >New ata driver (cvsup'ed several minutes ago) locks my box solid (only >reset but ton can help). Bug is fully reproducible on my machine (Toshiba >Satellite Pro 445). >I using the following command: dd if=/dev/zero of=/dev/ad0s2 bs=1024k. It >works several minutes

Re: the ATA driver

1999-03-30 Thread Soren Schmidt
It seems Kenneth Wayne Culver wrote: > Just letting someone know/confirming something: > > The ata drivers cvsupped 10 minutes ago have slowed my disk access to a > crawl. I went from 12 MB per second to 6 MB per second. Just thought I'd > let someone know because this seems to be a major problem.

Re: UPDATE4: ATA/ATAPI driver new version available.

1999-03-29 Thread Soren Schmidt
It seems John S. Dyson wrote: > Soren Schmidt said: > > > > DMA support has been added to the ATA disk driver. > > This only works on Intel PIIX3/4, Acer Aladdin and Promise controllers. > > The promise support works without the BIOS on the board, > > and timi

Re: UPDATE4: ATA/ATAPI driver new version available.

1999-03-29 Thread Soren Schmidt
It seems Tugrul Galatali wrote: > > There seems to be an oopsie with the includes on a system without PCI in > ata-dma.c: > > #include "ata.h" > +#include > + > #if NATA > 0 > -#include "pci.h" > #if NPCI > 0 > +#include "pci.h" > #include > #include > #include The "pci.h" should be be

Re: UPDATE4: ATA/ATAPI driver new version available.

1999-03-28 Thread Soren Schmidt
It seems Brian Feldman wrote: >I tried this out just as soon as I saw the announcement! Your driver is > really coming along well. I have three basic problems with it: > > 1. A hard reset is necessary to get the CD-ROM drive to work with acd. > > wdc0: unit 1 (atapi): , removable, > dm

UPDATE4: ATA/ATAPI driver new version available.

1999-03-28 Thread Soren Schmidt
Fourth update to the new ATA/ATAPI driver: Well, better late than newer, but things has been hectic around here, sorry for the long delay. DMA support has been added to the ATA disk driver. This only works on Intel PIIX3/4, Acer Aladdin and Promise controllers. The promise support works without

Re: Curent kernel fails compiling

1999-03-26 Thread Soren Schmidt
It seems Vincent Poy wrote: Sounds an awfull lot like you are using the old lpt driver which is no longer present in -current. Look in GENERIC | LINT to see how parallel port are handled nowadays > As of 3:53AM 3/26/99 PST -Current Kernel compiling, it fails at: > > loading kernel > lp

Re: vga driver and signal

1999-01-02 Thread Soren Schmidt
It seems Amancio Hasty wrote: > > Lets step back for a moment, this is clearly the wrong solution to > > everything, what exactly is it you want to do or want to accomplish?? > > Lets see if we can come up with another way of doing that... > > Okay, > > The problem that the XFree86 group is tryi

Re: vga driver and signal

1999-01-02 Thread Soren Schmidt
It seems Amancio Hasty wrote: > > Just trying to prevent dragging the whole X server to the kernel -- > Actually dragging the whole X server to the kernel is not a bad > idea --- however it is something that I can not afford to do right now :( Ahh, horror, Terry's old idea is coming back again :

Re: vga driver and signal

1999-01-02 Thread Soren Schmidt
It seems Amancio Hasty wrote: > > It seems Kazutaka YOKOTA wrote: > > > > > > AFAIK, not all video cards generate the vertical retrace interrupt. > > > Even worse, some BIOSes have a configuration option which instract the > > > BIOS NOT to assign an IRQ to the PCI video card. > > > > > > I full

Re: vga driver and signal

1999-01-02 Thread Soren Schmidt
It seems Kazutaka YOKOTA wrote: > > AFAIK, not all video cards generate the vertical retrace interrupt. > Even worse, some BIOSes have a configuration option which instract the > BIOS NOT to assign an IRQ to the PCI video card. > > I fully agree that the vertical retrace interrupt will be of gre

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