Print Page - 41256 RAM Equivalent Question

Title: 41256 RAM Equivalent Question
Post by: simondo on 15:33, 19 January 17

Hi.
I hope someone can help.

I want to do the DK'Tronics Ram Upgrade as posted here a while ago [size=78%]http://www.cpcwiki.eu/index.php/Upgrading_a_Dk%27tronics_RAM_Expansion (http://www.cpcwiki.eu/index.php/Upgrading_a_Dk%27tronics_RAM_Expansion)[/size]

I have come across some Intel 21256. Are they the same as a 41256?

Thanks,

Title: Re: 4125 RAM Equivalent Question
Post by: Bryce on 15:40, 19 January 17

Hi Simondo,
the article was from me. The 21256 is pin compatible with the 41256. The only difference is that the 21256 has a fast page mode which the 41256 doesn't. I haven't ever tried using 21256 instead of 41256, but I think they would work, however I can't guarantee this. 41256 chips should still be easy to source though.

Bryce.

Title: Re: 41256 RAM Equivalent Question
Post by: simondo on 15:49, 19 January 17

Thanks Bryce. Sorry for not crediting you in my last post :picard:

Theres some Intel 21256s on Ebay. Seller reckons that these Intel 21256 are same as 41256?

I also have some Hitachi HM51256P-10s at work. Looking at datasheets pinouts are also the same as 41256. Do you think these would work also?

Title: Re: 4125 RAM Equivalent Question
Post by: Bryce on 15:52, 19 January 17

Yes, the 51256 will definitely work, I've used them in other computers to replace 41256 in the past.

Bryce.

Title: Re: 41256 RAM Equivalent Question
Post by: simondo on 15:54, 19 January 17

That's great Bryce. Many thanks as always.

In that case .... I have a few 51256s if anyone else needs some.

Title: Re: 41256 RAM Equivalent Question
Post by: simondo on 14:12, 21 January 17

Unfortunately I have got the SMD version PCB dated 10/90,so no upgrade for me :(

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General Category => Technical Support - General => Topic started by: simondo on 15:33, 19 January 17