# Chip/Manufacturer ID - Possible ":C" logo

Does anyone recognize this chip or manufacturer logo? This chip is believed to be a circa 1990 25 MHz 386DX but the markings are a mystery. The marking at the corner looks familiar (:C I think it's a manufacturer logo) but I can't place it. Can anyone suggest what manufacturer or specific chip this is?

Chip Possible logo

FWIW, DS was a prefix used by Dallas Semiconductor but the font doesn't seem right for their chips.

For context, the chip is on the board asked about in this question on retrocomputing.se.

• Related on retro computing: retrocomputing.stackexchange.com/q/22378 Nov 23, 2021 at 23:28
• Might be Centaur Technologies, but they weren't active until 1995. They made embedded X86 type processors if I remember right, but this is just a guess. Nov 23, 2021 at 23:39
• Thought it might be a Dallas Semiconductor "DS39399" since that laser mark does look similar to the Dallas Semi logo; they were acquired by Maxim Integrated (where I work) which was recently acquired by Analog Devices. But I think I can rule that out; I find a lot of Dallas Semi DS39* parts, but no DS393* parts. Strange that there is both white topmark "DS39399.A 107M7NX" and also nearly invisible laser etch "23996 :C" Nov 24, 2021 at 0:52
• The marking on the chip in the lower right-hand corner is a company logo and indicates that the ceramic substrate was made by Kyocera Nov 24, 2021 at 5:08
• 2 additional photos here i.stack.imgur.com/rNbxm.jpg i.stack.imgur.com/P2P1s.jpg Nov 24, 2021 at 16:17