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Tomato 4DPS Cache RAM question

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First post, by daveculp

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I am building a 486 system around a Tomato 4DPS board and I want to put the max cache RAM in the system.

Currently it has 256K and I want to bump to 512K but I dont know what to buy.

The manual says I need 4 X 128K8 chips and 64K8 TAG chip. I am assuming I can use one of the current 64K8 chips as the TAG chip.

So, what do I buy for the 128K8 chips.

Will these work? If not, can you point me to what I need to get? Thanks!

Last edited by Stiletto on 2020-03-02, 06:14. Edited 1 time in total.

Reply 1 of 2, by pentiumspeed

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This one is fake.

I had ISSI chips from the of the day era does not look like this. I really recommend not purchase any cache chips from china. Try to find some original cache chips from anyone else.

Cheers,

Great Northern aka Canada.

Reply 2 of 2, by daveculp

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Thanks for the info. Will these work:

I need a 64K8 for the TAG in 28 PDIP: https://www.jameco.com/z/6264LP-70-Major-Bran … ower_85121.html

I need 4 128K8 in 32 PDIP: https://www.jameco.com/z/UPD431000ACZ-70L-NEC … .html?CID=MERCH

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