This is a short card and is a 1980s Australian-made multi-function ISA card for the IBM PC/XT.
The card contains 512 KB RAM, serial and parallel ports, RTC and battery.
I’m wishing to add it to a 5160 system but the settings for the eight switches are not known.
I’ve searched far and wide without success.
Any assistance very much appreciated.
Thanks
It’s possible someone called Gary Blythe in Sydney area had something to do with Hypertec Research
Have you been able to isolate the jumpers that relate to memory and those that relate to the RTC, serial and parallel functions? A multimeter probing between jumpers and the RAM chips, the 8250 (serial uart), and some of the other chips for RTC and parallel will help to narrow it down.
Can you please post a photo of the reverse side of the card? That would be satisfying retro tech eye candy and visible traces might also give some clues.
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Another reverse engineering-type strategy would be to use a linux box with an ISA slot motherboard - the kernel messages there can help to show any changes from toggling dip switches (power off first)
Thank you both for your advice.
I’ll try searching for Gary Blythe and see how I go.
I’ll try some analysis of the switch settings. It may shed some light. Of course, if functionalities fail, it may be either a hardware fault or incorrect switch settings.
Then there’s the RTC software.
I’ve attached a photo of the reverse side of the board.
Unfortunately I don’t have a Linux box.
A lot of fun to go!
Thanks
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