I have had several older HP vectras here that have had
HP-HPIL interfaces,
including an HP Vectra CS (8086) and a Vectra RS-20 (386). The HP-HPIL
interface was generally supplied as an 8-bit card that plugged directly
into the ISA bus.
If you're talking about HP-IL, that is *entirely* different from HP-HIL.
There's nothing called HP-HPIL.
As far as I know, there was never an ISA plug-in card to do HP-HIL. The
cards for HP-IL are not too rare.