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sgtunix
January 6th, 2014, 12:07 PM
I've been working on getting my IBM PC (5150) running again, and it happens that some of the RAM chips went bad.

I've taken the XT board and removed the faulty chips, so it has a full 256kB (all 4 banks are used).

Next up is getting the expansion board working again. It has 6 dip switches and some jumpers - see photo.

Right now I cannot get it to recognize the memory on this board (I'm adding one bank at a time), because I don't have any information on this board, so I'm unable to set the dip switches. I've experimented for a while, but unsuccessfully.

Can anyone identify this board for me - and possibly point me in the direction of its manual or data sheet?

16720

PS: You may notice that the battery is gone. It's there, but it's soldered on from the back.

Thank you!

george
January 6th, 2014, 02:03 PM
http://stason.org/TULARC/pc/io-cards/C-D/DIAMOND-FLOWER-INC-Multi-I-O-card-MF-100-MF-100-A.html

Stone
January 6th, 2014, 03:51 PM
PS: You may notice that the battery is gone. It's there, but it's soldered on from the back.The battery is only used for the clock functionality.

sgtunix
January 6th, 2014, 04:43 PM
http://stason.org/TULARC/pc/io-cards/C-D/DIAMOND-FLOWER-INC-Multi-I-O-card-MF-100-MF-100-A.html

Thank you! Really appreciate it.

@Stone - am I using the clock functionality for anything?