Tekram Technology DC-820B - Manual (Page 17)

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EISA Fast SCSI Caching Adapter
1.6.1 DC-820B Adapter Hardware Options
This field allows you to select the Interrupt level, Adapter BIOS address, I/O
port address, and DMA channel. Since most options in this category are
Adaptec-compatible, some enhanced options will be pointed out specifically.
Interrupt level selection: IRQ 11 - default. This option selects the host
adapter interrupt channel. Note that no other adapters may use the same
level. When you run out of available interrupts, you may enable the DOS 5
support enable/disable option (refer to next subsection) and choose the
Interrupt level selection as Disabled. This Disabled option is only valid for
DOS environments and all the SCSI devices have to be directly controlled by