The winner (and I'm the loser... 5250... Damn...)
15-pin *male* connector on the PC board ? Almost has to
be a 5250 Display Station Emulation Adapter (DSEA), It's the only cards
Ive ever heard of that uses a 15-pin male. It allows a PC to act as a terminal
on an AS/400 twinaxial network. There should also be a pigtail about 12"
long with a twinaxial T connector on one end and 15-pin female on the other
end that attaches to this card.
My HMM shows the (early, for system 36/38)5250 DSEA as
being a 69X6294 or the (later, for AS/400) 5250 DSEA as being a 64G3506,
but maybe there were some variants.
U4 Intel N8259A
U5 Siemens SAB 8088-2-P
The port is a male DB-15 (not HDD15!) The card is marked 93X2695
and another sticker says "To replace card order PN 69X6294"
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