99/4a TMS4116-15 Memory , will -25 slower memory work ?

[TI998owner]

Hi Group,

,

Been a very long time since I replaced a set of memory chips

On the TI99/4a main board. My question is , found a person that

Has some replacement TMS4116-25 memory chips. What I was looking for

Was the Original TMS4116-15 , that are in the 99/4a .

,

Does anyone know if these slower Memorys will work as replacements

and any effects or problems they might cause ?

,

Also does anyone know of a good source for the faster TMS4116-15 Memory ?

Or possible does anyone have a bunch they would be willing to

Sell plus shipping.

,

His

Basic price per chip he has is .85 CENTS to $1 per chip plus

Shipping. If someone has them at or near this price , please PM

Me.

Thanks for any info in advance

TI998owner on atariage

Lee

[Stuart]

According to Appendix B of the VDP data manual, 4116-15 and 4116-20 RAMs should be OK, but 4116-25 RAMs will not work under worst case conditions.

[+Lee Stewart]

Unicorn Electronics has them for $1.19 and the faster 120ns for $1.99. They have free shipping, but their order minimum is $30.

 

...lee

[+arcadeshopper]

I'd use 4164's modified so they work as 16's.. that way you have - less heat - lower voltage - higher reliability

I have them in stock at arcadeshopper.com

[+acadiel]

I'd use 4164's modified so they work as 16's.. that way you have - less heat - lower voltage - higher reliability

I have them in stock at arcadeshopper.com

 

 

Thread: http://atariage.com/forums/topic/257923-replacing-4116-ram-with-4164-for-reliability/