RTC8088 ISA Real Time Clock

Open-source real-time clock ISA card for IBM PC/XT-compatible computers lacking a built-in RTC

Physical productone_time

RTC8088 is an open-source ISA real-time clock card for IBM PC/XT-compatible computers that never shipped with a built-in clock, so the system stops keeping accurate time whenever it's powered off. It includes a DOS driver and configurable I/O port switches, letting vintage PC/XT owners add reliable timekeeping to a machine that never had it.

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