Enhanced models have WB cache scheme support. AFAIK they can be set for either scheme. Non-enhanced are WT.

aries-mu wrote on 2023-09-29, 13:06:

As per title question: […]
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As per title question:

• Intel 486 DX2 66
• AMD 486 DX2 80
• AMD 486 DX4 120

Any of them with write-back L1 cache?

Thanks

Yes, all of them do exist. Both Intel and AMD sold a lot of 486 processors to embedded system manufacturers when PC users already used Pentium and newer processors. These processors were based on the latest 486 cores by AMD and Intel, which included write-back L1 support. AMD even stopped selling processors with 8K L1 cache and started selling "486" processors using the 5x86 core with 16KB L1 cache. For Intel processors: You can recognize the L1WB core by "&EW" printed on the processor label. For AMD processors: You can identify L1WB compatible processors by the marking "SV8B" (8K L1 cache) or "SV16B" (16K L1 cache). The "B" at the end of these markings indicates write-back. "T" at that position would be write-through.

Intel's &EW
Amd 5x86 and 486 with 16GC

Cheers,

Please note that some of those DX2 are back-ported DX4 and may require 3.3 Volt setting!

I've been doing this research myself recently. I used this link during my research where one can review individual S-specs for features:

https://www.cpu-world.com/CPUs/80486/Intel-A80486DX2-66.html

Wow, thank you all guys!

Poorly documented. When you glance through, I notice lack of voltages for each, and suffixes. You have to check SL spec links, but I know not all exists.

Cheers,

pentiumspeed wrote on 2023-10-01, 00:20:

Poorly documented. When you glance through, I notice lack of voltages for each, and suffixes. You have to check SL spec links, but I know not all exists.

Cheers,

thanks

The Intel dx2-66 sSpec sx955 supposedly is a 5 Volt "&EW" and as far as I know the only Intel dx2-66 supporting write-back. Sx954 seems to be a dx2-50 5 vont with write-back

Disruptor wrote on 2023-09-29, 22:49:

Please note that some of those DX2 are back-ported DX4 and may require 3.3 Volt setting!

According to what I've found, the only Intel 3V3 DX2 is the SK080 which is write-through ... For AMD I have zero knowledge 🤣

H3nrik V! wrote on 2023-10-02, 12:34:

The Intel dx2-66 sSpec sx955 supposedly is a 5 Volt "&EW" and as far as I know the only Intel dx2-66 supporting write-back. Sx954 seems to be a dx2-50 5 vont with write-back

Thanks brother. Sorry I never noticed your replies