Somebody has some info? On the english wiki the oct 94 looks fake.
I found just indirect infos:
* the bioses started to support from middle 95
* the first pdf from oct 95
* there is no info from the 486 documentation in dec 94 (just the dx2 wb)
I have an article in a german magazine, that points to a release of the DX4 WB in october 1995. So it should be available in november 1995.
PC-Engineer wrote on 2022-02-10, 11:10:I have an article in a german magazine, that points to a release of the DX4 WB in october 1995. So it should be available in november 1995.
Do you have a scan? I also found the ibm 5x86 pdf from 1995 dec, they wrote:
https://datasheets.chipdb.org/IBM/x86/5x86/40042.PDF
The IBM 5x86C microprocessor supports write through and write back cache while the Intel DX4 microprocessor only handles the write through cache.
So it should very close to this date. Somebody should update the dx4 wiki page, the 1994 oct is false date - the overdrive released around this time: https://en.wikipedia.org/wiki/Intel_DX4
I have been wondering about this for a year or so, looking mainly at these things:
1. Late (1995) BIOS support
2. P24D (DX2 WB) only markings on 94 motherboard
3. I have yet to find a DX4 WB CPU with 1994 date code
So to me, October 1994 as release date is wrong.
EDIT: The earliest date code I've been able to find online is 1995/week 17, which would make it an April. Still SK101 are not very common CPUs, maybe those are some engineering samples? When we talk about IntelDX4 WB we usually mean SK096 or embedded SK099 and I think the youngest I've seen in that category is 1995 week 34 which makes it August.
The real market release should be late 95, early 96. The p24d should also be an early 95 release. I also found that the gap between the earliest manufacturing date and the market release is about 2-3 months. So, October-November 95 seems realistic.
I have seen P24D CPUs with 1994 manufacturing date (week in November/December) but of course I cannot confirm they were sold in 1994. But you know what, at least there are multiple clues that those were in fact available in 1994 - news articles, BIOS support, markings on the motherboards, units with proper date codes on them... The same cannot be said about DX4 WB.
i found this.. even the intel did not have exact date in the middle of the 94 about the dx2wb release.
I have taken the liberty of editing the Wiki page and changed the release date from October 1994 to generic 1995 as it is hard to pinpoint the exact date.
