Are 41256 ram chips compatible with 4164s?

[BlueApple]

I've been trying to repair a Tandy CoCo 1 64k. I ended up swapping the ram but I noticed the chips I put in it are 41256s. Is it safe to leave these chips in the board? The only different pin is the 256k has a address pin where the 64k has a NC. I think it should be okay if A8 is grounded but I just wanted to make sure.

[xmris]

IIRC 4164 vs 41256 have different pinouts , esp the Vcc

[wraper]

Should be fine. Certainly no damage will happen.

[BlueApple]

IIRC 4164 vs 41256 have different pinouts , esp the Vcc

Hmm... The datasheet I was looking at had everything in the same place.

[xmris]

bummer , sorry! you are right I may confused them with other IC (video ram or something,) ok quick search on the
comp.sys.cbm group , revealed this: https://groups.google.com/g/comp.sys.cbm/c/kxvYo45pnWo  HTH

[BlueApple]

bummer , sorry! you are right I may confused them with other IC (video ram or something,) ok quick search on the
comp.sys.cbm group , revealed this: https://groups.google.com/g/comp.sys.cbm/c/kxvYo45pnWo  HTH

Thanks! It said you should make sure pin 1 is grounded, and it is on the CoCo!