In my Apple IIe, which I did acquire used, there is this slot card I can't identify:
Looks like some weird sort of serial (RS232 ?) card to me (the rainbow ribbon cable hides the word "serial", and due to the many discrete components which could be level shifters), but I'm stuck with this conjecture. If it is a serial card, it must be 100% software driven. No ACIA IC to be found. But there are two PROMs on it.
It does not look like an Apple product.
Any hints to what it might be, and if there is a manual (pdf) for this sort of card would me much appreciated.
- Uncle Bernie