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Amiga computer related discussion => Amiga Marketplace => Topic started by: X-ray on April 11, 2005, 09:20:38 PM
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Chaps, I have been looking around for quite a while now and I still haven't found what I need, which is a pair of 32mb SIMMS, 60ns, but single-sided, to put on my PPC card. I found some on ebay for about $16 and ordered them. They arrived today and I tested them and they don't work. I haven't been able to determine whether they are faulty or simply not of the required type but the bottom line is I tested them in various combinations on my PPC card and my DKB card and they don't work.
Soooo after a long time with fruitless searches on the net and ebay I am beginning to think these are difficult to find. If you have a pair of these and are willing to sell, let me know because there's no reason why I should let my PPC card continue to have 96mb when it can have 128mb.
Edit: the reason I want single-sided is because a double-sided SIMM won't fit because of the crystal oscillator next to the last SIMM socket. As it is, a single-sided SIMM such as the 16mb one that I have currently installed, almost rests on the oscillator.
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@X-Ray
I havent forgotten for this one, Ive been searching for this for a while for you. I'll keep you posted.
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@ Matt
No problem, I understand fully why you're battling to get them. They just seem to be a rare item, I don't think you are letting me down.
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@X-ray:
May I ask why do you need single-sided 32MB simms?
I can point you to normal double sided 32MB simms that work fine with CSPPC.
Is it due a space issue, e.g. clock crystal on your CSPPC is in a socket?
Alternatively, there are also extra slim double-sided 32MB simms out there that fit better than normal 16MB single-sided simms to most simm slots out there.
EDIT: Oh, I guess I was too late with spotting your EDIT. :-)
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@ Sledge
Ja, it is because of the oscillator. A single-sided SIMM already almost touches it (less than 1mm clearance), so unless the double-sided SIMM has its modules embedded flush with the PCB it is not going to fit.
Edit: and I was too late spotting your edit that says you were late spotting my edit :-P
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I see simms fairly regularly, I'll try and keep an eye out.
I may even have one that's not being used - I can't remember for sure if it's a 16 or a 32 though...
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Check this out.
Top view (http://www.x56h34.com/amiga/slimmem1.jpg)...everything looks pretty normal...can't see the big difference.
Side view (http://www.x56h34.com/amiga/slimmem2.jpg)...tadaaaah. :-)
See how thinner that one is than the other one (standard sized) 32MB simm module?
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@ Vince
I suspect I would need a matching pair though for the paired addressing. But I'm no expert. Anyone know whether I can have a SS SIMM in the cramped slot and a DS SIMM in the other slot, if they are both FPM and 60ns? If I can do that with no performance penalty I would be keen to buy your SIMM, Vince.
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@ Sledge
I think my second oscillator sits a lot higher than yours. This picture hints at the difference:
tall (http://www.amiga.org/gallery/index.php?n=873)
I wonder if i can get a right-angled adapter if all else fails (just my luck the adapter will be angled the other way)
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It's a bad picture, and doesn't really portray how slim this module is, however I agree...it would probably still be a longshot as far as fitting it with that tall oscillator in place.
Why don't you desolder the socket and put a 50mhz oscillator back in, like how it was originally supposed to be? It depends what you want more. Extra speed or more ram. :-)
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No, I don't want to bring a soldering-iron anywhere near my PPC board....I bought it second hand with everything as you see it in the pic. I don't know what oscillators were originally provided with the card, but it works fine and I won't meddle with it. I already had a bad experience with spacers, I don't want to push my luck.
It seems the SIMM adapters I remember are no longer to be found, but I remember them being similar to this (http://www.busboards.com/products/memory/simm72/) but without the test circuitry and much smaller. Looks like I will have to find a single-sided SIMM.
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I bought a pair of 64MB single sided SIMM's ages ago (Before my PPC went pop)
But saying that I wouldnt sell them and they probably wouldnt help anyway as they are as tall as a house. :-)
Wasnt I helpful? :lol:
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"...probably wouldnt help anyway as they are as tall as a house..."
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Tall doesn't matter because I have cut the drive chassis cross-bar. But I suspect if I wanted to go the 64mb route, they wouldn't have to be single-sided since I would be using only 2 slots anyway ;)
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If your in the US I have a few pair of simms still here. I know the
32MB set are not sigle side but they were used in a CSPPC before i
sold it off. Your welcome to them if you want to pay the shipping.
email me at acill(at)mac(dot)com with your info and we can work it
out.
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@ Acill
Thanks for offering, but I really do need single-sided. There is just no clearance for double-sided. I have spare 32mb double-sided, of various types, and not one will fit.
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Hey Yo!
I have a single sided 64meg simm, i swapped my double sided 128meg simm for it. I am not sure whether the single sided 32 simm are that dear, i think you can get single sided 32/64 simms quite cheaply on ebay. The real chestnut here though is the single sided 128meg simm, now these are rare and dear. I think our Only Fools And Horses Maniac ones a couple (that he uses himself :-( ).
Regards,
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Single side 32MB SIMMs doesn't works in CSPPC or better . . . are recognised as 16 MB each :-(
EDIT- at least EDO one . . . i'm not 100% sure about FPM.
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@ X-ray
I have a couple of 16 meg simms (single sided) you can have for postage cost if you want. I have no idea of the timings for them, they came out of an ancient p1 pc.
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Hmmm, seems you haven't mentioned Power Computing (http://www.powerc.com/cgi-bin/gp?pg=amiga.main&sid=&uid=ssaQjS9Qeuo78u2&rn=383&aid=&cid=1) in this thread...
They have 32MB SIMM slim £49.95 (http://www.powerc.com/cgi-bin/psearch.cgi?code=355-0005&rn=960&aid=&uid=ssaQjS9Qeuo78u2&sid=&cid=4&act=gpage) and 64MB SIMM single sided £99.95 (http://www.powerc.com/cgi-bin/psearch.cgi?code=355-0012&rn=960&aid=&uid=ssaQjS9Qeuo78u2&sid=&cid=4&act=gpage). Probably expensive (I have no idea about simms/dimms/ddr/whatever-abbreviation-it-is-this-week anymore).
Doesn't say what speed they are, but a quick email about it could be helpful ;-)
I haven't found my simms yet, but I'll keep looking.
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@ Framiga
Aha, once again your knowledge is very useful, as the ones I ordered from ebay are EDO. One is recognised as 16mb and the other is probably faulty because it crashes the machine.
@ Star69
Thanks for the offer of the 16mb SIMMS but I have those currently installed, which gives me 96mb in total on the board. (I have a pair of SS 16mb and a pair of DS 32mb)
@ Vince
Those prices from Power Computing are quite steep.
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I think that Framiga may be right. Any kind of non-standard format of 72-pin simms usually doesn't work on Phase 5 accelerators, so it's very possible that these single sided 32MB simms wouldn't work, or at least they would show up as 16MB each.
I have four slim double-sided 32MB modules (Kingston brand) that have 2 memory chips per side. These are probably the slimmest simms that I've ever seen. Every single Phase 5 card that I tried those in (1230-IV, BPPC, CSPPC, CSMK-II) detected the simms as 16MB each. Even my friend's old PC Pentium 1 failed to recognize them as 32MB each...yet the label on them clearly says 32MB, as well as specs on the web.
In any case, your best bet is to find a standard 32MB double sided simm, with extra small memory chips. I am sure that lots of them exist out there that would work with Phase 5 cards just fine.
You need to be patient. :-) That, or like I said before, try to desolder the oscillator socket and put the oscillator back onto the PCB as it once was. Maybe get a skilled person to do this for you, if you are not confident enough of pulling the job out yourself.
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I think that Framiga may be right. Any kind of non-standard format of 72-pin simms usually doesn't work on Phase 5 accelerators, so it's very possible that these single sided 32MB simms wouldn't work, or at least they would show up as 16MB each.
i have here a couple of this "things": 32MB 50ns SS 4 thin chips, seen like 16MB each.
Last but not least, i suspect that this POS, has fried my 1st CSPPC . . . argh!!!
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@Framiga:
:-(
I guess it's not worth it when it comes to messign with a CSPPC card in order to boost performance. It's a very fragile card, so no overclocking, no 68060 cpu removal (weak socket), no pressign down on the PPC fan/heatsink, use standard memory...and the list goes on. :-)
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Well, folks, despite my solemn statement that I wouldn't mess with my PPC card, I gave up last night after trying several different single-sided SIMMS and having no success with them - not even on my DKB3128 board. So, I took the PPC card out and looked at it for a long time. Then I turned it over and looked at it for a long time. Slowly the little tendrils of adventure manifested themselves as a slight curling of my lip and a gleam in my eye. I forgot all about the trouble I had with the spacers. I forgot that X-ray + soldering iron = potassium permanganate + glycerin. Ja, my friends, I forgot my station in life and I took a soldering iron to my PPC board...
...and I now have an 060 oscillator that sits a lot lower than it used to. In fact it sits low enough for me to use double-sided SIMMS in all my banks. The nice thing though, is that I didn't screw up my board. Many of you would say 'pah' and shrug as if I had announced I had successfully farted without soiling myself. Nevertheless I am pleased to say my Miggy has all the RAM it is entitled to: 256 + 16 + 2. :-)
Now...out of curiosity...is it just bad luck that no 32mb single-sided SIMM has ever worked on my PPC card or on my DKB board? Do I have to phone Scully and Mulder? Or is this universal? Does anybody here use 32mb single-sided SIMMS on a Phase 5 Cyberstorm PPC or a DKB3128 board? :-?
Edit: I blame X56 for corrupting me at every turn :-P
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Job well done! :-)
Now go to your nearest river or a lake and throw in your soldering iron, so that you could not mess with the ppc card again. ;-)
Also, don't forget to post pictures of your handywork so I can criticize it. :-D :-P ;-)
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Too bad I got here late for the POST...
I have a 32 mb, FPM @ 60ns Simm with flush mount chips (total thickness of the SIMM is 2.5mm) that is used at the moment on my Blizz1230... it came out of a PC, which recognized it as 16mb and at the time I had an 8mb Simm stuck in my 1230, so I replaced it with it, and to my surprise it was a 32mb simm, ran a MEM test on it and it functioned without flaw...
I would have sent you this baby for the reimbursement of the Shipping Charges... but glad you got it to work anyhow...
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@BadBigBen:
He'd need at least a pair of those in order for them to possibly work as CSPPC memory controller is 64-bit so memory needs to be installed in pairs.
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@ BadBigBen
Thanks for the offer anyway, my good man. I appreciate it, but my problem is now solved. (Thanks also to Vince who offered me a SIMM earlier).
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@x56h34 - this I did not know... never had a CSPPC, and now they are just too plain EXPENSIVE...
@X-ray - no problem... just glad you got it to work...