Identifying 30-pin SIMMS

[Cyberus]

I'm completely au fait with 72-pin SIMMS, but if I have say a 1M x 9 30-pin SIMM, that's a 1 Megabyte parity SIMM, yes?

So an 8 Megabyte SIMM will be 8M x [a number]?

Thanks

[LocalH]

It would probably be 8M x 9, because I'm assuming the 9 refers to the number of bits per byte (8 like normal, plus the one 'parity' bit). Non parity should be ?M x 8.

I would think so, anyway.

[Cyberus]

Thanks. Yep - most of the SIMMS I've got are 1Mx9 or 256K(!)x9
With the odd non-parity e.g. 256k x 8

Essentially, I asked a question that I could've answered myself...doh! I ought not to be so quick to ask other people.

As an aside - has anyone got any 8MB 30-pin SIMMS spare?

Regards

[Hyperspeed]

Which Amigas used 30-pin SIMMs and which used 72-pin?

Did the earlier Amigas just take the chips, like ZIP?

[Cyberus]

No amigas used 30 pin SIMMS AKAIK.
I just wanted to populate my Fastlane.

Ciao

[Brian]

As far as I know there are no 8Mb 30pin simms, I belive it jumps from 4Mb stright to 16Mb.

[Cyberus]

Brian wrote:
As far as I know there are no 8Mb 30pin simms, I belive it jumps from 4Mb stright to 16Mb.

Really?
Hmm, my old computer tech at college gave me 2 x 8MB SIMMS a while back, and another thing - on the BBoAH, it says that the Fastlane can be populated with up to 64MB. It has 8 slots, so I assumed (for some reason) 8 x 8MB SIMMS.
I must admit though, I haven't seen any 8MB ones for sale...

[Framiga]

Hi Cyberus

i understand well what you mean :-(

Before to find 2 4MB 30pins SIMMs, i've purchased a BUG of 1MB one.

A friend of mine, finally founded 2 of them (with a Google search) used by some Cisco routers.

Try to put the cod on Google and if you are lucky . . . :-)

Ciao

EDIT- btw the 8MB one, are very, very rare.

very cheap 4MB one here:

http://www.satech.com/4mb-30-pin-simm-memory.html

Take a look here for comparision:

http://www.transcendusa.com/Memory/STDSearch.asp?type=30%20PIN%20SIMM

OR if you want this "cheap" 8MB one at 33 EUR !?!?!

HERE (bottom page)

[Brian]

@Cyberus

The fastlane has not 8 but 16 30pin slots. 16 * 4MB = 64MB. The description only talk about 1, 4 and 16MM simms and that it after the newer ROM only accept 4 and 16MB simms.

If you have any 8MB simm I guess they're defect 16MB ones?

[Cyberus]

@ framiga

Thank you! Yes, they are very cheap!

@ Brian

You are right, I've just re-read the description.
Doh! And I have one upstairs next to my A4000!


Thanks guys :-)

[Brian]

Weird... yes checked that link and it does seem like there are a few 8MB 30pin simms out there... one learns new things every day... don't think they are that common though and as said the FastLane only accept 4 or 16MB ones so.

[djkoelkast]

The GrandSlam 500 can hold 8 30 pin SIMMs of max. 1mb each.
Next week I'll recieve a bunch of 30 pin SIMMs so then I have an A500 with 2,1gb harddrive (SCSI) and 8.5mb fastmem
how does that sound?

[Cyberus]

djkoelkast wrote:
The GrandSlam 500 can hold 8 30 pin SIMMs of max. 1mb each.
Next week I'll recieve a bunch of 30 pin SIMMs so then I have an A500 with 2,1gb harddrive (SCSI) and 8.5mb fastmem
how does that sound?

And your point is?

[djkoelkast]

no point, they asked what amiga uses 30 pin simms.. well there it is

[Cyberus]

djkoelkast wrote:
no point, they asked what amiga uses 30 pin simms.. well there it is

Oh ok.
But there are NO Amigas that use 30 pin SIMMS AFAIK, only Amiga addons.
The Pre A3000, they were soldered onto the motherboard, A3000 they were ZIP chips and A4000 was 72-pin SIMMS
AFAIK