The - even older - Opti 82C391 / 82C392 chipset for 386 CPUs supports L2 WB cache also.

majestyk wrote on 2024-02-06, 13:16:

The - even older - Opti 82C391 / 82C392 chipset for 386 CPUs supports L2 WB cache also.

How is this related to the thread?

CoffeeOne wrote on 2024-02-06, 14:14:

majestyk wrote on 2024-02-06, 13:16:

The - even older - Opti 82C391 / 82C392 chipset for 386 CPUs supports L2 WB cache also.

How is this related to the thread?

This was (clearly) referencing what you wrote a couple of posts back:

"OK about L1 WB: As user MikeSG already wrote, you can check very easy if your DX2 is a WB type by just reading the markings.
But I don't think there is any 486 board with only ISA slots, which supports L1 WB for the 486 CPU.
https://theretroweb.com/chipset/documentation … f2936617240.pdf
I think the WB in this description refers to the L2 cache, so you don't need to check if you have a &EW CPU, it will not make any difference.
I think the chipset was really state of the art, when it was released: 1991! Amazing."

And speaking of a state of the art 486 chipset with L2 WB support it seems natural to mention an even earlier (386) L2WB chipset by the same brand - just in case it might be of any interst for people reading this.
I didn´t intend to provoke the thread police and risk a warning for off topic spamming of course...

majestyk wrote on 2024-02-06, 14:51:

This was (clearly) referencing what you wrote a couple of posts back: […]
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CoffeeOne wrote on 2024-02-06, 14:14:

majestyk wrote on 2024-02-06, 13:16:

The - even older - Opti 82C391 / 82C392 chipset for 386 CPUs supports L2 WB cache also.

How is this related to the thread?

This was (clearly) referencing what you wrote a couple of posts back:

"OK about L1 WB: As user MikeSG already wrote, you can check very easy if your DX2 is a WB type by just reading the markings.
But I don't think there is any 486 board with only ISA slots, which supports L1 WB for the 486 CPU.
https://theretroweb.com/chipset/documentation … f2936617240.pdf
I think the WB in this description refers to the L2 cache, so you don't need to check if you have a &EW CPU, it will not make any difference.
I think the chipset was really state of the art, when it was released: 1991! Amazing."

And speaking of a state of the art 486 chipset with L2 WB support it seems natural to mention an even earlier (386) L2WB chipset by the same brand - just in case it might be of any interst for people reading this.
I didn´t intend to provoke the thread police and risk a warning for off topic spamming of course...

We were talking only about L1 write back.

I am not sure why, but for some inexplicable reason the wright back chips that I have stopped working maybe I need to try a bios reset? anyway, I got it working again using a non-wright back

ODwilly wrote on 2024-02-05, 02:57:

tony359 wrote on 2024-02-04, 17:48:

That's a shiny motherboard 😀

Very glad it made it there safely and very happy to see it in good hands being properly used!

I still can't believe I'm seeing it alive. Makes me glad I spent $10 on it on eBay years ago xD ($30 but there were two other boards with it)

It has had quite the journey. It made it from washinton AC to Washington DC then to UK and arizona

(double post)

CoffeeOne wrote on 2024-02-06, 15:00:

We were talking only about L1 write back.

So you should mark this clearly as a typo:
"I think the WB in this description refers to the L2 cache,..."

majestyk wrote on 2024-02-06, 15:20:

CoffeeOne wrote on 2024-02-06, 15:00:

We were talking only about L1 write back.

So you should mark this clearly as a typo:
"I think the WB in this description refers to the L2 cache,..."

WTF are you talking about? I added a specification of the 486 OPTI chipset. In there they write about write back, so in this description WB means L2 WB.
Please don't answer to this now. Side topic closed.