Started by brams, January 04, 2006, 07:47:44 am
Quote from: bramsI put a QS dual 800 CPU module in my Digital Audio G4, ran the extra wire the the 4th post etc.CPU works fine, with the exception that the level 3 cache is not seen or detected during or after boot. The 256k per CPU level 2 cache is seen but not the level 3.I've tried the XLR8 cache control SW & Powerlogix as well but it does not see the cache. Listing the device tree in openfirmware does not reveal it either (not sure if it would anyway?)Hi,I have the same problem. Powerlogix CPU Director works to enable the L3 in os 9. Sonnetcache worked in the earlier versions of Panther. Nothing I can find enables the L3 in Tiger. But this all suggests it is a software rather than a hardware problem.I did a lot of digging and looking at logs (particularly of CPU Director), checked the Apple Developer software tools (CHUD) Reggie program which shows all the parameters of the L3 but can't enable it, and apparently the L3 cache RAM isn't being identified. I'm not a programmer or a techician, so I haven't got any further than that.If you find a solution, please let me know. An email to this list will notify my via email.Thanks,Rich[/code]
Quote from: bramsHmm, Panther worked?, which version?.Are you using a Digi Audio, which QS CPU are you using?***I'm using the same one as you are, the dual 800. I know of at least one other person who has encountered this problem with that cpu in the DA.As regards Panther, I believe I had the L3 working and noticed it didn't work in Tiger when I loaded it onto a spare drive. I hesitated to use Tiger for that reason for a few months. When I did upgrade seriously, I tried installing Panther on another drive to confirm that the L3 worked but I got distracted and never finished. Note that Powerlogix CPU Director didn't work in Panther, only Sonnetcache, but I can not confirm that. I reviewed some old logs in Techtool that did confirm that it was working in the early days of Panther.Powerlogix has to revise CPUD every time Apple comes up with a new version of Tiger. I keep hoping something will finally click. They haven't done the upgrade yet for 10.4.5.I am convinced that a few lines of firmware code would solve this problem. but like you, I haven't been able to find a way to look at the firmware code for Quicksilver. You can read it in the latest upgrade for D.A. but there are no upgrades for the Quicksilver firmware.If you know anyone with a QS, you can probably find a way to print it out but the difference between QS and DA may be even deeper, in the early startup mediated by the rom.It has taken too much of my time to try to solve it but it makes me crazy. The machine is pretty nice, even without the L3.Rich
Quote from: "brams"HiYes the machine has been running 4.2.8 ever since the update came out in late 2001, as you can see Quick Silver machines do not use this version of firmware, though as far as I can tell they do use a later one than 4.2.8Obviously there is a difference between a Digital Audio & Quick Silver logic board, however I always thought it was down to the 4th CPU mounting post which is 12V and carries the extra current, I assume the dual 533 must have got it's current through the socket, but I think the dual 800 and above needed a seperate supply as they must take more current than the dual 533, this seems to be the case with 3rd party CPU's as they have a seperate wire and a molex.It does seem that QS firmware is designed the switch on the cache at boot time. Thing I don't understand though, is that some, if not all sawtooth G4 run with the level 3 cache working when they have a QS CPU fitted, why not a Digital Audio?Is there anyway to rip the rom image from a dual 800 QS and write it to a file and then flash my Digital Audio?, or is there anyway to get the lvl 3 cache to work?I need about another 18 months out of this G4, I was going to get a G5 but now with the Macintel things on the way I want to wait until they have gone 64bit before I take the plunge. Thus I need as much juice as this G4 can deliver.
Quote from: "Richard Starr"It has taken too much of my time to try to solve it but it makes me crazy. The machine is pretty nice, even without the L3.
Quote from: "brams"Are you using an Apple dual CPU module out of a QuickSilver G4 in your Digital Audio? or 3rd party, these ones work fine, I have a dual 1.2 clocked at 1.4 Giga Designs in my other Digital Audio and it works like a charm, lvl 3 cache, the works. Seems the problem is with OEM Apple QS modules in DA's but maybe not Gig-E's or Sawtooths.Is it possible to downgrade the firmware?. I know there was also a 4.2.5 which is supposed to be quite rare, apparently is you have one of these, you can't upgrade to 4.2.8 but the the 3rd party CPU makers say you don't need to in that case?Quote from: "Richard Starr"It has taken too much of my time to try to solve it but it makes me crazy. The machine is pretty nice, even without the L3. Agreed but it's the fact it's there not working that does my head in, I am very fastidious and it bugs me.Cheers
Quote from: "phollens"Sorry. It is an Original Apple CPU out of a Quicksilver with 12V run to the 4th post hole. I need to remember to be more specific.
Quote from: "brams"OK this much I know.Digital Audio used 667 & 733, MPC 7450 (2.0). 466, 533 & X2 533, MPC 7410 (1.3). 667 & 733 used 1mb lvl 3 cache at 33% of cpu clock.QuickSilver (1st version) 733, 867 & X2 800, MPC 7450 (2.1). 733 no lvl 3 cache, 867 & X2 800 2mb lvl 3 cache at 25% of cpu clock.QuickSilver (2nd version) 800 MPC 7450 (2.1). 933 & X2 1.0ghz MPC 7455 (2.1). 933 & 1.0ghz 2mb lvl 3 cache @ 50 to 100% of cpu clock (not sure but DDR). 800 seems to be de-clocked 867 from 1st gen.Thus, Digital Audios never had a X2 MPC 7450 configuration, only X2 MPC 7410, also it seems they are a later revision on the QS (2.1 vs 2.0).Could it be the fact that it is an MPC 7450 CPU and not a 7455 that allows the cache on yours and not on mine?
Quote from: "brams"OK this much I know.Could it be the fact that it is an MPC 7450 CPU and not a 7455 that allows the cache on yours and not on mine?