RTC DS12887 Replacement Module CR1220 Socket for 486 Pentium DS12B887 BQ3287 For Sale

This listing is for a high-quality RTC module replacement designed for repair and restoration of vintage computer systems. It serves as a drop-in replacement for original Dallas-style real-time clock modules with integrated, non-replaceable batteries.

• Drop-in replacement for Dallas RTC modules
• Compatible with DS1287, DS12887, DS12B887
• Also compatible with BQ3287 and OEC12C887 modules
• Reported compatibility with Twinhead TH1287
• Uses replaceable CR1220 coin cell battery
• Designed for 486 and early Pentium motherboards
• Includes machine-pin socket for installation
• Eliminates issues caused by dead internal RTC batteries

• Not confirmed compatible with Digital / Compaq Alphaserver DS10
• Compatibility list is based on tested and user-reported systems
• Not all systems have been tested

• Install in correct orientation — incorrect installation will permanently damage the module
• Pins are fragile — handle carefully during installation and removal

1 x RTC Module Replacement
1 x Machine Pin Socket
1 x CR1220 Battery (Not included for international shipments)

This product is based on the open-source design by Necroware. Full project details are available on GitHub.

• Carefully assembled and tested modules
• Secure packaging to prevent damage in transit
• Fast handling and reliable service

• Combined shipping available — add all items to cart before checkout
• Items are securely packaged for safe delivery
• International buyers: battery not included due to shipping restrictions

RTC replacement DS1287 DS12887 DS12B887 BQ3287 OEC12C887 CMOS battery fix vintage PC 486 Pentium motherboard repair Dallas RTC alternative CR1220 module