I have a motherboard with an Intel 845 chipset and a mix of PCI and ISA slots. I'm trying to use an Adaptec AHA-1522A SCSI adapter (ISA bus) in it. When I boot the system, I get this message:

warning: Have option ROM can not be invoke

(The grammar is exactly the way it shows on the screen)

The SCSI board uses INT 11, I/O 340h and BIOS address DC000h.
I've tried caching the DC000 range and reserving INT 11 for the ISA slot. No good.
Is there some way to get this board to work?

TIA
Tom Lake