Need Help Identifying This Add-On Card for a 286

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Need Help Identifying This Add-On Card for a 286

Postby tegrady » 2017-11-25 @ 15:57

Hi, I just ran across an auction for this item.

I cannot figure out what it is though. The box calls it "Add-On Card for '88 '286 Personal Computer". The card itself says "CK-1" and C/N 800310. The main chip is UM82C8167 and it has an onboard battery. There is no i/o port on it.

Here are the photos. Any idea what this is?

Thanks.
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Re: Need Help Identifying This Add-On Card for a 286

Postby Arkady » 2017-11-25 @ 16:05

It's a clock/calendar card for IBM PC/XT and compatibles.
With a bit of luck, you will be able to set time and date with the MS-DOS commands or you will need a specific driver.
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Re: Need Help Identifying This Add-On Card for a 286

Postby jesolo » 2017-11-25 @ 16:07

Just to add to the above.
Older PC's didn't come with real time clocks so when you shut down and restarted the PC, you had to enter the date and time again.
This card kept the date and time settings and was loaded via a driver upon start up.
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Re: Need Help Identifying This Add-On Card for a 286

Postby tegrady » 2017-11-25 @ 17:07

Thanks for the info! Sounds like I have no use for this card...
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Re: Need Help Identifying This Add-On Card for a 286

Postby Ozzuneoj » 2017-11-25 @ 17:34

A lot of times add-on boards would have multiple functions, including an RTC like this. I'm not sure when PCs started having them built into the motherboard as standard, but my IBM 5150 has an AST SixPak Plus that has provides 384K memory expansion, RTC, serial, parallel and a gameport on one board. Having just a single tiny card just for the RTC alone doesn't seem like a terribly interesting use of limited ISA slots in older boards.
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Re: Need Help Identifying This Add-On Card for a 286

Postby Zup » 2017-11-25 @ 17:44

RTC was made standard with XTs, so they could keep HDD and floppy configuration.

Multi I/O was standard with Pentium 2 (maybe MMX?). Before that, only few morherboards had integrated IDE/floppy/com ports. Through 286/386/486 and Pentium, I've seen computers with integrated ports, but it was not usual.

Gameports were usually a sound card thing, so they got integrated at the same time (Pentium MMX?).
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