Most of use have heard of fake cache chips. Today, we worry most about buying slow cache chips remarked as faster models for our retro machines. However, there was a time when dubious business people went the extra mile to sell fake chips! I found one of those boards at the scrapyard. If it is true, then the buyer of this board may have never known that this board never had any second level cache! Let's find out what is going on with those chips!

Link to the article (German): https://web.archive.org/web/200008172...

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▬▬▬▬ Timestamps ▬▬▬▬▬▬▬▬▬▬▬▬▬▬
00:00 BEKtronic BEKV429S
02:25 Article claiming my chips are fake
04:54 Original BIOS (2.01r) no cache
08:32 Preparing second BIOS chip
11:00 BIOS 1.2 no cache
12:18 BIOS 1.2 with fake cache chips
15:16 Testing cache chips with programmer
19:41 BIOS 1.2 with working cache chips
22:21 BIOS 2.01r with working cache chips
25:09 Cache Check
25:49 Testing cache chips with multimeter
28:00 Conclusion