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[News] Department of bizarre hardware fixes: Accelerator boardANN.lu
Posted on 19-Jul-2002 00:21 GMT by Johan Rönnblom47 comments
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When my CyberstormPPC stopped working, I fixed it with a piece of wood. Maybe this could help someone? Or at least give you a laugh.. Pictures
Department of bizarre hardware fixes: Accelerator board : Comment 1 of 47ANN.lu
Posted by 4pLaY on 18-Jul-2002 22:37 GMT
Haha great! i wish id try that before i sent my card to DCE =) or sent the card to that french dude that fixes the cards.
Department of bizarre hardware fixes: Accelerator board : Comment 2 of 47ANN.lu
Posted by cOrpse on 18-Jul-2002 22:44 GMT
now thats an amiga style fix :).
my fix to get my bppc/Bvision to boot and run for twenty minutes is to hang pc psu fans over the bvision side of the card , with that on it will boot , and i can then start miami(+rcftpd) , once thats going i can start the PPC RC5 client to do some blocks for amiga.org , it'll fetch , then start a cruncher , then die and not boot up again for around an hour :(((
The 68k side of life seems to be stable for 2 or so hours with the 040 cooled , but don't go anywhere near it with GG's GCC that crashes it if you even try and compile , i'm sure its trying to tell me to work less :P.
Now if only i can find someone silly enough to swap mine for their a4k + Csppc :P
Department of bizarre hardware fixes: Accelerator board : Comment 3 of 47ANN.lu
Posted by cOrpse on 18-Jul-2002 22:47 GMT
In reply to Comment 1 (4pLaY):
>french dude that fixes the cards.
french dude ? fixes cards ?? where ??? does he do Phase5 blizzard ppc's ???? can he fit a scsi on my beast also :) ?????
Department of bizarre hardware fixes: Accelerator board : Comment 4 of 47ANN.lu
Posted by 4pLaY on 19-Jul-2002 00:23 GMT
In reply to Comment 3 (cOrpse):
Yep there is some french dude that fixes these cards! (Hyperion uses him also) so i guess he is good at what he does! to bad i didnt know of him before ;( and right now i forgot the url to his page but im sure someone else here has it.
Department of bizarre hardware fixes: Accelerator board : Comment 5 of 47ANN.lu
Posted by Joe "Floid" Kanowitz on 19-Jul-2002 00:27 GMT
Looks like it's 'just' the socket, if this works, or potentially the pins of the CPU. Careful scraping with a jeweler's screwdriver, and bending of the little socket-grippers, might acheive the same effect, and if you could find anyone with the proper soldering rig in your area, they just might be able to swap on a fresh one at a reasonable price. (Maybe even a ZIF, if they come in the right size?)
Something to consider if the board ever ceases to function. Contacting an amateur radio club could be a way to find people with serious electronics hookups in your area, and if you found someone friendly, you might get by with a donation equivalent to whatever DCE may've charged.
Department of bizarre hardware fixes: Accelerator board : Comment 6 of 47ANN.lu
Posted by cOrpse on 19-Jul-2002 00:42 GMT
In reply to Comment 4 (4pLaY):
may be an idea to get mine fixed by him then sending it off to anyone with even a very small relation to DCE , i'd never see it again :(.
Or i could just sell up and f*ck off , the whole amiga things such hassle, may aswell just become another linux geek or summin.
Department of bizarre hardware fixes: Accelerator board : Comment 7 of 47ANN.lu
Posted by Anders Kjeldsen on 19-Jul-2002 06:34 GMT
What a touching story.. and a piece of WOOD.. who would have thought!
Department of bizarre hardware fixes: Accelerator board : Comment 8 of 47ANN.lu
Posted by Ben Yoris on 19-Jul-2002 06:44 GMT
URL of the french dude : www.amiga.fr
Email him and describe the problems before sending him anything.
IIRC I had 3 boards repaired for Hyperion thanks to him.
Department of bizarre hardware fixes: Accelerator board : Comment 9 of 47ANN.lu
Posted by Troels E on 19-Jul-2002 07:02 GMT
Hehe.. Laugh of the day:-)
Hope it can help others!
Did anybody else beside me note that Corpse actuallly talked about his PPC card almost WITHOUT mentioning DCE/P5/Bplan in a negative way:-)
Department of bizarre hardware fixes: Accelerator board : Comment 10 of 47ANN.lu
Posted by alan buxey on 19-Jul-2002 07:13 GMT
In reply to Comment 2 (cOrpse):
to the guy with BVision and only 20 minutes of system life.
i had similar problem with mine. i found it to be contact based too....
all i did was wedge some paper under the bottom of the BVision (near the clockport
connector) which in turn changes the PPC angle (make ure BVision is screwed
to BPPC card). I also did the 'floppy power' thing....3.5" power connector
direct from PSU onto the floppy connector head on the motherboard
(nice hole in BVision for this purpose 8-) )
my uptimes are >11 days (only rebooting when i start to play with dodgy new aminet downloads ;-) )
Department of bizarre hardware fixes: Accelerator board : Comment 11 of 47ANN.lu
Posted by cOrpse on 19-Jul-2002 08:05 GMT
In reply to Comment 9 (Troels E):
>Did anybody else beside me note that Corpse actuallly talked about his PPC >card almost WITHOUT mentioning DCE/P5/Bplan in a negative way:-)
I'm only negative when people tell me to praise or respect people that took me for a ride or take my hard earned money for a broken product , and people don't understand why i don't want to touch anyone thats only even been sightly involved with the whole affair ... but its quite simple , burnt once , not again and i don't care if they changed their name and stuck up different signs.
Also the DCE issue , the most piss taking thing about that is they can update their website , have the bplan boys over for beer/produce some pegasos' and still not give decent people like 4play any information on their cards . a simple its fucked , its bin material would probaly do for most people.
Its a giving up and moving to greener fields day today , had enough of junk .
Department of bizarre hardware fixes: Accelerator board : Comment 12 of 47ANN.lu
Posted by cOrpse on 19-Jul-2002 08:22 GMT
In reply to Comment 10 (alan buxey):
>to the guy with BVision and only 20 minutes of system life.
they know me as extremist troll or something similar i believe :P
>i had similar problem with mine. i found it to be contact based too....
>all i did was wedge some paper under the bottom of the BVision (near the >clockport connector) which in turn changes the PPC angle (make ure BVision is >screwed to BPPC card). I also did the 'floppy power' thing....3.5" power >connector direct from PSU onto the floppy connector head on the motherboard
>(nice hole in BVision for this purpose 8-) )
I have one of the original EZ-towers that feds the power in via the floppy header , but even with a (meaty psu , starts with g , can't remember ) on the back its kack :(.
I've took the top sheild off the motherboard as well to allow for the fans the get air around the back so maybe i could wedge something in their to sort it out. Seems to me tho everthing i do gives me the stable effect for an hour then i move a window or something and it screws the screen up and crashes , then it goes back to 20min uptimes again :(( , Its been like it from day one , i remember it like it was yesterday ....
<fuzzy>
the package came from powercomputing , my brother and i were excited indeed.
we soon shuned the lowly viper and plugged in the blizzardPPC ( It was alone at this point, the bvision hadn't came out yet )
It booted , it was snappy thanks to its new found 040 , we installed the PPC.lib ready for play
Played something , maybe a V-arts PPC demo and it locked up , we put it off as a bad prog
It did it again and again :(
we rang companies again and again , got told it was our problem , go see someone else.
</fuzzy>
*sigh*
>my uptimes are >11 days (only rebooting when i start to play with dodgy new >aminet downloads ;-) )
Grr i hate you(in a nice way) , every bugger else got a working card somehow , i got the one that kills amiga's lol.
Department of bizarre hardware fixes: Accelerator board : Comment 13 of 47ANN.lu
Posted by Johan Rönnblom on 19-Jul-2002 09:19 GMT
In reply to Comment 5 (Joe "Floid" Kanowitz):
It's not the socket. The PPC doesn't have "pins", it's a BGA package,
connected by little solder balls. It's impossible to reach these balls
directly I'm afraid, except by pouring contact cleaner under the chip.
To fix it, I think you'd need to remove the small components under the
chip, and then use special equipment to remove the chip and "reball"
it. This is exactly what DCE claims to be good at (and they probably
are) but I need my card and can't afford the risk of losing it for an
undetermined period of time.
Department of bizarre hardware fixes: Accelerator board : Comment 14 of 47ANN.lu
Posted by Mirko Naumann on 19-Jul-2002 09:31 GMT
That´s no laugh that´s a cry!
I can´t believe that!
How can somebody do something like that to a piece of high technology?
The board has six! layers and the processor is high integrated and tiny and
breakable. OH NO! That´s all I can say. You´re going to destroy the board and
the cpu as well.
That´s not your TV set that sometimes needs a kick for a better picture!
You DESTROY the card!!!
Do so and forget that somebody like DCE could repair it anymore. You blow the
paid money in the wind. And what will you use then? The cpu of a calculator?
I don´t know exactly what went wrong but as I can see the cooler and the fan
are bullshit! I think your PPC is going to hot. You have to cool it down and
not to press the fan on the cpu! Maybe you´ll reach some degrees less but for
what price?
Do something good to your card and buy a better cooler with fan like it is
used for actual PC cpus and if you´re doing so add another one to 68k cpu and
maybe one to the Symbios Logic chip (UW-SCSI). I did so and everything works
fine!
Department of bizarre hardware fixes: Accelerator board : Comment 15 of 47ANN.lu
Posted by Mikey C on 19-Jul-2002 10:09 GMT
In reply to Comment 14 (Mirko Naumann):
Well I too had problems with what I though was my Bvision but instead it turned out to be the blooming heat sink paste used on the PPC chip.
(I found this out through a final act of desparation) I removed the compound that Phase 5 had put in, re-attached the PPC heatsink and hey presto, I never had anymore problems again.
I got rid of my A1200 040/PPC603 160 a while back when I got a 603 240mhz. However the bod who now has my old card and BVision is still using it today with no problems at all.
Regards
Mikey C
Department of bizarre hardware fixes: Accelerator board : Comment 16 of 47ANN.lu
Posted by Robert Hjertkvist on 19-Jul-2002 10:12 GMT
In reply to Comment 14 (Mirko Naumann):
Technology isnt as sensitive as many think, this "mod" while being a little strange, wont really hurt the CPU-board nor the processor.
I have had a PCmotherboard covered in non-conducting oil, and cooled it to -30C no harm done. I have also had a PC motherboard cooled to -20C without any extra insulation, no problems there either. I have never managed to damage any computercomponent during my years as a computeruser. A little common sense is all that´s needed. However pre 80s technology computers can many times be much more sensitive to electrical discharge and such things.
Department of bizarre hardware fixes: Accelerator board : Comment 17 of 47ANN.lu
Posted by Robert Hjertkvist on 19-Jul-2002 10:15 GMT
In reply to Comment 16 (Robert Hjertkvist):
Dunno what i managed to do wrong there, my previous comment where supposed to be a reply to comment 13 not 14 :P
Department of bizarre hardware fixes: Accelerator board : Comment 18 of 47ANN.lu
Posted by Anonymous on 19-Jul-2002 11:04 GMT
Try pulling the board off and cleaning the contacts before you send it off.
Department of bizarre hardware fixes: Accelerator board : Comment 19 of 47ANN.lu
Posted by 3seas on 19-Jul-2002 11:39 GMT
In reply to Comment 13 (Johan Rönnblom):
if you are going to put pressure on one side of the board to press the CPU down
into the socket, you probably should put something on the other side, so as to
not bend the board but only press the board/Socket and CPU together.
A multi-layered borad is not something you want to break the inner traces of.
As to what material to use, to do this......well the wood you are using is not
going to hold it's shape with the heat and all, and probably why you are having
to re-adjust it. You need something more sure, like metal but insulated with
rubber, glass or ceramic.
But I'd consider getting the socket fixed or replaced and use your fix only until
you can get that done. Perhaps check around local and see if there are such shops
that could do it in your area.
What I find interesting about this thread is that apparently you are not the only
one having such a problem or CPU related problem....And the suggesting that heat sink
compound is relative.
But one thing is for sure........Amigahobbists
Department of bizarre hardware fixes: Accelerator board : Comment 20 of 47ANN.lu
Posted by Jack Perry on 19-Jul-2002 11:58 GMT
This isn't the first time I've seen something like this. I bought a used Amiga 500 in the summer of 1991 (1992?) and the chip near the serial port was wedged into place with a small chip of wood. I knew the guy who had repaired it; he said he had no idea what was wrong with it, but it worked that way, and didn't without it.
My friends joked for years that the 500 needed a hamster running in a metal wheel to generate power...
Department of bizarre hardware fixes: Accelerator board : Comment 21 of 47ANN.lu
Posted by Kenshiro on 19-Jul-2002 12:02 GMT
But will it also work with MDF? or even PLY?
Department of bizarre hardware fixes: Accelerator board : Comment 22 of 47ANN.lu
Posted by Fab1 on 19-Jul-2002 12:37 GMT
It's quite funny to read this post, because I also had a ppc with almost the same problem.
My 68060's socket was a bit loose in the corners especially, and i used legos to press on the 68060.
It has been working quite well for 1 or 2 months, but I decided to send it to Phase5 anyway. It was on 27/12/1999...
3 weeks later, Phase5 went bankruptcy. How lucky i am.
I have never seen my ppc since then, and bought a new one. Thanks to a friend which went to DCE, i have got back a 68060 from DCE.
So, my advice is : don't send it to DCE, but fix it properly though, because it won't work forever...
Department of bizarre hardware fixes: Accelerator board : Comment 23 of 47ANN.lu
Posted by Lord Steven on 19-Jul-2002 13:31 GMT
Oh, thank you so much for posting this topic! I've had a Cyberstorm lying around for months! After reading this, I put it back in this morning and applied pressure to the PPC and it worked! I've jerry rigged it now so that there is a metal bracer being pushed down on the fan from the CD-ROM drive that rests above it (A4000D) and it's working fine now!
Department of bizarre hardware fixes: Accelerator board : Comment 24 of 47ANN.lu
Posted by Rik Sweney on 19-Jul-2002 13:39 GMT
In reply to Comment 14 (Mirko Naumann):
>That´s no laugh that´s a cry!
>
>I can´t believe that!
Yes, but if it's fucked you've got nothing to lose. Plus I've heard that people send their cards to DCE and never see them again...
Department of bizarre hardware fixes: Accelerator board : Comment 25 of 47ANN.lu
Posted by Johan Rönnblom on 19-Jul-2002 14:25 GMT
It's definitely not a heat problem. And of course this is a somewhat
risky hack. I've added an illustration to the page to explain what
I think the problem is and how I think the hack works.
Department of bizarre hardware fixes: Accelerator board : Comment 26 of 47ANN.lu
Posted by Rune E. Jensen on 19-Jul-2002 15:43 GMT
In reply to Comment 12 (cOrpse):
>Seems to me tho everthing i do gives me the stable effect for an hour then i move a window or something and it screws the screen up and crashes , then it goes back to 20min uptimes again :(( , Its been like it from day one , i remember it like it was yesterday ....
Just like mine :(
But I found the problem: the 1x1cm chip under the heatsink overheats.
Try to use some thermal paste and a bit of metall to connect it to the heatsink.
You also need to cool the other two (three?) identical chips on the other side.
Apparently the chips controll the data flow to the BVision... and they crash :(
Department of bizarre hardware fixes: Accelerator board : Comment 27 of 47ANN.lu
Posted by Mad-Matt on 19-Jul-2002 16:39 GMT
In reply to Comment 26 (Rune E. Jensen):
Ive had my Bppc + Bvision for 2-3 years now. Cant say i have an overheat problem on ppc or bvis, but the 040 needs cooling else fpu doesnt work. I really should add more compund to ppc as original has turned to powder. But there is no fan coolingin my power tower at all apart from on the 040 side (and this is more or less in contact with tower cassing.
I have only just recently decided to add the floppy power line as ive never thaught ive needed it, system boots fina everytime. I do have probs with pcmcia ethernet, power led dimms right down when in use and system crashes nearly all the time when in use. ive added floppy connector to see if it remadies it and so far bright power led at all times ..(the led adapter i modified long ago to be powered seperatly).
Department of bizarre hardware fixes: Accelerator board : Comment 28 of 47ANN.lu
Posted by Johan Forsberg on 19-Jul-2002 17:02 GMT
In reply to Comment 24 (Rik Sweney):
> Yes, but if it's fucked you've got nothing to lose. Plus I've heard that people send their
> cards to DCE and never see them again...
Amen. Send a card to DCE and it *is* gone.
Typically, customers first exchange some emails with them (as they've heard about DCE's horrible reputation). DCE will reply along the lines of "Sure, send it over, we will fix it in about three weeks." So you send your card... Then you mail them back a couple of months later and wonder what happened to the card. They make a lame excuse like "Are you sure you sent it?". And then, they never, ever reply to your emails again.
DCE are *evil*. Unfortunately they are also the only manufacturers of classic '060 and PPC cards. I've lost a 060:50/128MB/18GB drive card to them. Now I'm stuck with a 030:25/16MB/500 MB. Fucking useless. So, do I wait (I have heard rumors of people actually getting their cards back, after 2/3 years), or buy a new €600 card, or just give up and buy an alternate computer.
I gave up. I bought a PC, and a Macintosh. I dislike them both, intensly.
Department of bizarre hardware fixes: Accelerator board : Comment 29 of 47ANN.lu
Posted by Ian on 19-Jul-2002 18:19 GMT
In reply to Comment 28 (Johan Forsberg):
DCE's reputation for "losing" hardware is infamous, but I wonder why all the people who have lost hardware to them (and there seems to be many) don't form a group and try and sue them in the German courts. Perhaps spearheaded by someone who lives in Germany. I know it's easier said than done.
Department of bizarre hardware fixes: Accelerator board : Comment 30 of 47ANN.lu
Posted by BigPoppa on 19-Jul-2002 19:30 GMT
Funny, while DCE was TERRIBLY slow on my repair (a Phase 5 060 acc) they did it cheaply (replaced entire unit for $150) and earned my respect. It's just that it took 6 months.
Department of bizarre hardware fixes: Accelerator board : Comment 31 of 47ANN.lu
Posted by LoL on 19-Jul-2002 23:19 GMT
Imagine the inside of a pegasos rigged up like that to work...eheh....
Department of bizarre hardware fixes: Accelerator board : Comment 32 of 47ANN.lu
Posted by Lando / Trinity on 20-Jul-2002 08:56 GMT
In reply to Comment 31 (LoL):
Don't tempt fate :)
Department of bizarre hardware fixes: Accelerator board : Comment 33 of 47ANN.lu
Posted by Chain|Q on 20-Jul-2002 11:49 GMT
Hehe, it's a really cool way to fix problems. Anyway, i think it's possible to do hacks in a more elegant way. For an example, we have a guy here in Hungary, who replaced the 603 on his BPPC, with a 300Mhz one, from a dead Mac mainboard (the Mac got some closer relationships with a thunder...). The replacement was made with the help of a local company specialized to SMD stuffs, not a homemade hack. So, after the hack, the BPPC was started immediately on 300Mhz, and he was even able to overclock the 603 to 350Mhz, and it now runs stable on that clock speed, without any extra cooling on the PPC! Cool eh? (The board has a 060, and SCSI too, and thoose works OK too.)
Anyone has faster one? ;P (Not counting any AONE, since you still can't run AmigaOS on thoose boards!)
Anyway, i can't understand why DCE not gives us faster PPC cards, since there are 604's and 603's available up to around 400Mhz, and as this example shows even an older P5 BPPC board can handle this clock speeds easily... Hey guys at DCE, give us some niiiiiice 604/400Mhz boards! Who cares about the lame G3's on a PC-like mainboard, when i could have a really FAAAAAST CPU in my REAL Amiga??? ;)
Department of bizarre hardware fixes: Accelerator board : Comment 34 of 47ANN.lu
Posted by treke on 20-Jul-2002 14:07 GMT
In reply to Comment 33 (Chain|Q):
Helloo haver, az utolso mondatot egy csopped elloted.
Really fast CPU in classic amigas doesn't make sense, because of context switches and I think these 200 Mgz difference are making the (IBM-mademore cache) G3 faster ;).
It is good that AmigaOne is legacy-free and DCE-free (what is maybe the same)
re
Treke
Department of bizarre hardware fixes: Accelerator board : Comment 35 of 47ANN.lu
Posted by Chain|Q on 20-Jul-2002 17:36 GMT
In reply to Comment 34 (treke):
Hello, nem lottem el, megpediglen ket ok miatt, amit lentebb leirok. ;)
I don't think context switches are really so big problems in a well-written software. As an example, in the current optimization process of the new Moovid 1.6, (I've some internal betas here, with some really cool new features) some context switches (per frame!) were removed from the PPC version, but the speed increase was quite unnoticeable. And it was fast enough already. ;) Anyway, AmigaOne can be faster of course, but 1., there's still no OS for it. Don't forget, every screenshot we had from the OS4 still running on 68k-based Amigas! 2., I don't think the G3 can be that fast, since G3 is developed from 603, not from 604, and 604 has far better performance at equal clock speeds. Of course G3 is still a nice CPU, and that big amount of L2 cache helps a LOT, but a faster 604 (at least until we have OS on AmigaOne) still would be a big help to keep up with PC's in some CPU-squeezing areas. And don't forget, there is NO hardware redesign needed, since the current cards WORKS with higher clock speeds, just the CPU needs to be replaced with a faster one.
Department of bizarre hardware fixes: Accelerator board : Comment 36 of 47ANN.lu
Posted by Indoro on 20-Jul-2002 18:51 GMT
In reply to Comment 35 (Chain|Q):
Keep in mind, newer PPC (read G3/PPC75X) series parts use a lower voltage than the 603/4 parts..you can't just interchange them without additional modifications.
Department of bizarre hardware fixes: Accelerator board : Comment 37 of 47ANN.lu
Posted by Alkis Tsapanidis on 20-Jul-2002 19:56 GMT
In reply to Comment 16 (Robert Hjertkvist):
Try to do that to a BPPC card and see how quickly will the card be destroyed...
It has... *11* layers.
Department of bizarre hardware fixes: Accelerator board : Comment 38 of 47ANN.lu
Posted by Alkis Tsapanidis on 20-Jul-2002 20:01 GMT
In reply to Comment 29 (Ian):
Cause they don't try to contact DCE by phone? :)
Anyway DCE *CAN* get annoying "some"times.
Department of bizarre hardware fixes: Accelerator board : Comment 39 of 47ANN.lu
Posted by Alkis Tsapanidis on 20-Jul-2002 20:02 GMT
In reply to Comment 36 (Indoro):
The 740 is compatible with the 603e. It did work:)
Department of bizarre hardware fixes: Accelerator board : Comment 40 of 47ANN.lu
Posted by strobe on 21-Jul-2002 01:14 GMT
I had a similar problem with a POS Mac clone (yes, it was a PowerCenter).
Not long after the power supply, CD drive, hard drive bit the dust, the CPU started to fail (only the power supply died within the warranty). The machine would crash after a few minutes of use.
I found that putting force on the processor card would improve stability, but only for a few weeks then the symptoms would come back. Eventually the technique stopped working altogether and on closer inspection I found out that the processor had not been soldered correctly! Some pins were just resting on top of the daughtercard and would disconnect when the CPU got hotter.
Today the machine works thanks to a friend who sent me his unused daughtercard. It came from a Power Center Pro which has a 60mhz bus instead of 50 with a 4x multiplier. I replaced the Xtal with a 50mhz one and changed the ratio to 4.5 (an effective upgrade from a 150mhz 604 to a 250mhz 604e). It works except the processor card slot is messed up because of my previous abuse, however it's fixed by placing a heavy object on the card to prevent it popping out |-p
FYI: If you have a utility to check all your RAM continuously I find this is the best stability test on many platforms.
Department of bizarre hardware fixes: Accelerator board : Comment 41 of 47ANN.lu
Posted by Indoro on 21-Jul-2002 05:00 GMT
In reply to Comment 39 (Alkis Tsapanidis):
Yes, the 740 series are..but the 740 is not what Apple considers to be a "G3" chip. The 75X (750, 755, etc.) series are not pin for pin compatible...
A few modificatiosn could be made that allow the 750 seris parts to work..but they will not natively. The 750 series parts have the larger L2 cache..as I recall the 740 does not, though I may be mistaken.
The 740 however, is a much better choice than the 603 if you are after a speed gain. ;)
Department of bizarre hardware fixes: Accelerator board : Comment 42 of 47ANN.lu
Posted by Alkis Tsapanidis on 21-Jul-2002 06:21 GMT
In reply to Comment 41 (Indoro):
Well, a friend of mine tried replacing his 603 with a 740. It did work... for 3 days. It seems that it short-circuited. The CPU was fried. But it was fast:)
Department of bizarre hardware fixes: Accelerator board : Comment 43 of 47ANN.lu
Posted by treke on 22-Jul-2002 05:16 GMT
In reply to Comment 35 (Chain|Q):
Hi.
1. No OS for A1. I hope, this is only matter of months (and -joke- linuxes are available ;) )
2. In every good written SW (ie with system calls) are context switches, because of system calls which are calls to 68K libraries, then the cache has to be freed
3. I'm not a performance expert, but seriously, do you think that 600Mhz G3 with lot of L2 cache is slower than a 400Mhz 604?
maybe this talk is pointless now, but we can reincarnate after some months.. ? ;)
Addig is, viszlat !
re
Treke
Department of bizarre hardware fixes: Accelerator board : Comment 44 of 47ANN.lu
Posted by StormLord on 22-Jul-2002 07:15 GMT
As I have done some really serious studying about the PPC series processors I can assure you that a G3 chip with or wothout L2is faster from an 604e at the same clock UP to the factor of 1.4.
Yes the 604e's are more "profesional" designs not because of their speed but from their internal ability to multi-processing.
of course with some external hardware you can make any chips to work together...
G3 IS an 603 though is has an advanced pipelining..
As Alkis said I did an ppc740 to work!?...
only for 2 days an the maximum Uptime was 1 hour with the average been about 5-10 minutes..
I belive the prob was from the soldering of the bga processor (but not sure..).
By the way anyone knows where can I find a ppc 740 OR a 603 at 300+ ??
Department of bizarre hardware fixes: Accelerator board : Comment 45 of 47ANN.lu
Posted by Lennart Fridén on 22-Jul-2002 09:07 GMT
LOL! Good work Johan, good work! :-)
Department of bizarre hardware fixes: Accelerator board : Comment 46 of 47ANN.lu
Posted by cOrpse on 22-Jul-2002 10:10 GMT
In reply to Comment 26 (Rune E. Jensen):
I could be wrong ... but i think you've fixed it :) , i couldn't get anypaste to
help cool those 1x1 cm chips ... so i sellotaped a pc psu fan to the trap door over
the phase5 ppc cooler.
We've cracked 5 RC5 Units for Amiga.org and i'm writting this from it :))
Gonna see if it lasts till 3'o clock , and if its still running i'll go get very
pissed :)))))
Department of bizarre hardware fixes: Accelerator board : Comment 47 of 47ANN.lu
Posted by Anonymous on 22-Jul-2002 11:39 GMT
In reply to Comment 44 (StormLord):
"with some external hardware you can make any chips to work together... "
For modern architectures SMP performance will be unacceptable (up to perhaps 1000x slower) unless you use a CPU variant with explicit support for multiprocessor. I do not know which G3/G4 variants do that - maybe all of them, but certainly early PPCs didn't have this support.
<lesson type="history">
BeOS tried this trick during the DR series of pre-releases, having specialist SMP PowerPC boards made without paying $$$ to the chip manufacturer or waiting for commercial volume on MP capable variants. Most of the time it went fast, some times it was a little slower than UP, and once in a while it would just lock up (apparently their coherency fixes were not 100% on the ball)
Fortunately for them Apple and later Intel decided that consumer SMP boards were a Good Thing (TM) and so release-quality versions of BeOS could be used with SMP hardware that actually worked. Unfortunately they never fulfilled their promise to deliver "better" Media support. Some people blame app vendors, but in fact like Amiga they were trying to cut corners. No multi-monitor, no 3D, no pro audio I/O support, etc. etc. Can't blame app vendors when the OS is unfinished.
BeOS did run quite well on SMP hardware though, and at the time was felt to justify Microsoft's opinion that an OS must be designed from the ground up to run well on a multi-processor system. Linux disproved that a couple of years later.
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