California Computer System Calendar Clock 7424-01

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BIT
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California Computer System Calendar Clock 7424-01
Anyone have information or a PDF manual for this card?I noticed that the EPROM has the label 7624, while in other photos found on the internet, the label is 7424-01.
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maybe here

https://ftp.apple.asimov.net/documentation/hardware/clocks/

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I've got one of those cards. 

I've got one of those cards.  They use a standard button cell, I think a 357 will work.  The only hassle for me is those PROMs are unobtanium anymore and the 2708 is one my EPROM programmer can't handle.  What I may do if I need to change programming on my card is use a 2716 with an adapter.

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 softwarejanitor wrote:I've

 

softwarejanitor wrote:

I've got one of those cards.  They use a standard button cell, I think a 357 will work.  The only hassle for me is those PROMs are unobtanium anymore and the 2708 is one my EPROM programmer can't handle.  What I may do if I need to change programming on my card is use a 2716 with an adapter.

Hopefully, you've aready dumped the contents of the EPROM so you'll have something to burn down the road. Also, it looks like you can use a couple of RAM chips instead; not sure what or how hard those would be to obtain. But then you could just load the driver from disk when booted.

 

Wonder if anyone made a ProDOS driver for that?

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saint wrote:https://ftp.apple
saint wrote:

https://ftp.apple.asimov.net/documentation/hardware/clocks/

 

Thank you saint, I found them!ccs * .pdf :)

If anyone is interested in the contents of the EPROM, I can download it, to compare it with previous versions.

 

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"Wonder if anyone made a

"Wonder if anyone made a ProDOS driver for that?"

 

I'd be surprised if nobody ever did, but whether one is still available or not I don't know.  It's a pretty simple card which uses a common clock chip of that era.

 

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