Amiga.org
Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: Effy on December 04, 2004, 11:07:52 PM
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A Blizzard 1260/50 Mhz can have up to 128 Mb according to The Big Book Of Hardware at this link (http://www.amiga-hardware.com/blizzard1260.html) but on http://amiga.resource.cx (http://amiga.resource.cx/exp/search.pl?dir=a1200proc) they say it can only handle 64 Mb on the 1260 and 128 Mb on the scsi controller .. was is true and what is not true ??? :-?
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Well... I'd say a little bit of both. The original B1260 have a simm socket that have the simm flat over the CPU wheres the newer DCE have a slightly angeled simm socket. Both hardwares handles 128 modules but due to how the simm sits on the P5 product it can only be singlesided on this cards. All singlesided I've come across have been max 64Mb so there's why amiga.resouce.cx say 64. However there are people that have doublesided simms in these anyway and fixate the simm with other means such as rubberband and it handle up to 128Mb so.
DCE handles single/doublesided 128Mb no problem.
P5 handles doublesided up to 128Mb if you can fixate the simm somehow, else singlesided up to 64Mb.
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The SIMM socket on my DCE Blizzard 1260 is flat. . . .
Trev
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You're right Trev... I didn't think stright but there are 2 different models out there of the B1260... some with angeled simm socket and some with a flat one. Is it the P5 then that is angeled or is it just different "batches" that have been done this way due, to I dont know, cheaper parts?
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Thanks Brian, the add for that card is HERE (http://cgi.benl.ebay.be/ws/eBayISAPI.dll?ViewItem&rd=1&item=5145124952&ssPageName=STRK:MEWA:IT) and the fun thing about it is the title : Amiga 1200 phase5 Blizzard 1260 68060/70 MHz 32MB Turbo
Who wouldn´t be interested in such a turbo thing ?! 70 Mhz with only minor cooling !! :-o No, it is not mine that I sell but somebody else called Lord_Spider ... had a few mails with him to ask why he said 64 Mb and not 128 Mb ...
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Ow my... 70Mhz XC060 with just a tiny heatsink covering about half the CPU. Can we all say bbq at his place next week? I meen... my B1260/50 had a bigger heatsink then that covering all the CPU (though there where no finns where the simm was to obvious reasons), special trapdoor (used metal mech found on speakers to add airflow) and feets to lift the unit half an inch and it still went poff one day when I reinstalled OS 3.1 on it (shouldn't be much load on the CPU for that I think)!
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Highjacking the thread but keeping with the theme... I got myself a Blizz1230/50/IV/0Mb + SCSI-IV kontroller, swapped it for a GVP1230/40/8Mb, a SurfSquirrel SCSI kontroller, a pizza and an A500 memory board (plus I guess I'll give him some extra jun... goodies when I find some).
I got it for my black A1200 project, looks nicer with a builtin SCSI kontroller and I can still use the PCMCIA for ethernet, he had this in his old A1200T project that's not in use no more... he got two A600 he uses instead an a fat A1200T with PCI and stuff. Anyway... as he uses SCSI in the new tower and his A4000 aswell I think we both gained some from this... I get a neater little unit and he get to be able to use SCSI on his A600's. It's good to have friends to swapp things between.
Anyway... back to the tread related. It's said the B1230 will also take 128MB or 256 with the SCSI kontroller. I can just say that this one too won't be able to take doublesided fullhight simms on the board (most 128 are fat simms) so I guess it should also be concidered 64Mb as the B1260 is?
It gave me a good scare... put 32 on the card and 64 on the SCSI. Registered as 20! Removed the 64, wouldn't power up, replaced the 32 with a 16, power flashed. Replaced the 16 with my 64 and it started and regged as 64... pwew... won't mock with it no more... still haunted by my B1260 burning up on me in that machine. :-(
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I installed 2x64 MB SIMM's om my Blizzard 1260 and SCSI-kit. They 're double-sided, but these memmory chips were very flat. The brand is Siemens. All of this is fitted in An A1200 desktop.
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As said it can be done with rubberbands and other not ment for meens to keep them in place but I'm saying it's not designed for it. I meen... my singlesided high 64Mb simm is rubbing up against the CPU so that it will only lock in the simm socket at the end away from the CPU.
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IIRC, the maximum for this particular type of accelerator is 128Mb.
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We've already covered that it does support 128Mb theoreticaly yes... the electronical components support 128Mb but the formfactor doesn't. The doublesided simms can't fysicaly fixate correctly in simm sockets. You can of cause get around it by coming up with other ways of fixate the simms at angles in the simm sockets such as rubberbands, glue etc. or solder on other kinds of simm sockets.
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I've got my hands on 2 singlesided 128 EDO SIMMs.
As I don't have the SCSI adapter for my Blizzard 1260 I can only place one. But i can tell you this: It works like a charm!!
If you're interested in the other 128 SIMM contact me, Effy.
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Preparing a mail for you as we speak :-)
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Singelsided 128MB simm... damn! Thought they didn't exist. Well, that changes things I guess. ;-)
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@mendark:
Where did you find the singlesided 128MB EDO SIMMs and what brand/model are they of?
/Patrik
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Hi guys!
You can really notice 128mb works like a charm here since i could'nt remember how it looked like.
Soo.. as my previous post saying it's singlesided, i have to dissapoint you and apologize to you since it's doubleside.
BUT, it's sooo thin (as thin as regular SDRam) it fits easy in a blizzard (like it's the case with me).
I scanned it so you all can see it:
http://members.chello.nl/m.burgerhout/ram.jpg
I'm happy to sell one. Mail me your bids.
greetings!
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In other words, as Mendark said, double sided 128 Mb Simms CAN work if they are thin enough.That gives a better perspective on future upgrades :-) Thinking about start saving a bit of money then :lol:
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I really should post a picture in the images section of my 128MB double-sided simms that the size of average 32MB modules. :-)
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@x56h34:
Yeah, you definately should. Also posting their model/make and some tips of where you can get hold of them wouldn't exactly be unwelcome either ;).
/Patrik
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patrik wrote:
@x56h34:
Yeah, you definately should. Also posting their model/make and some tips of where you can get hold of them wouldn't exactly be unwelcome either ;).
/Patrik
Kahlon (http://www.kahlon.com/category.asp?catID=1) sell 128MB SIMMs for $20. However, they ship whatever SIMMs they have in stock at the moment. The last time I got some ultra-slim double-sided NEC 128MB 60ns SIMMs and they would probably work in a Blizzard 1260. Before that I got some thick Samsung SIMMs that I had to sell on to a PC owner as they wouldn't fit in my BlizzardPPC. As mentioned in another thread, I bought some 128MB 50ns SIMMs on eBay. If they work, I might consider selling the NEC SIMMs.
/Martin
P.S. Patrik, I'll try to find the time to take those photos tomorrow...
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Give me 64mb of 60ns FPM over 128mb of 50ns EDO any day. I'm not sure
if EDO gives 100% reliability, especially server stuff.
I remember on the old UK Gordon Harwood adverts in Amiga Format for
the Blizzard boards they said the B1260 could take 64+128Mb and the
B1230-IV would be 128+128Mb.
I know that if you use both slots - you will be limited to 70ns speed
anyway. It doesn't matter if you have 60ns FPM or 50ns EDO... you
will be restricted to 70ns automatically to keep the SCSI-IV happy.
I've read 3 websites that say FPM is a better choice for non-PPC
Amigas (as well as an equal amount of Apple Mac websites).
Amigas cannot utilise the EDO hardware so only use them if you can't
find FPM in the first place. Admittedly the FPM is physically larger
as it's older but I still have a 64Mb FPM on my B1260 mainboard that
doesn't bend the trapdoor and gives me the reassurance of 100% legit.
The SCSI-IV with me doesn't seem to want a double-sided SIMM either
(DCE put some sort of capacitor on the board the clowns).
:-D
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I bought two 128 Mb EDO modules in the US on Ebay but I am told they only will work for sure in a HP server and not on normal pc´s. Is this true ??? :-?
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I think I'd be inclined to avoid HP or Compaq SIMMs as they're usually
large in physical size and have parity or ECC chips.
Whilst Phase5 only said to avoid the laser printer memory I suspect
they would have wanted users to check the DRAM codes, look at the
physical size/dimensions and make a common sense choice.
If it fits in the A1200 desktop then it's probably good for your
towered A1200.
If you have a big box Amiga you still have to remember that even
though you have the space; the Amiga hardware as well as the Phase5
hardware was 1995 standard.
Consider my pleas for the use of FPM over EDO!
My system has never been so stable since installing it.
:-)