User`s manual

DIGITAL-LOGIC AG MSLB-P5 Manual V0.3

PRELIMINARY 122

9 SCSI INTERFACE (OPTION)

The SCSI-2 interface is realized with the AIC-7880 controller. This chip is fully supported by Adaptec

Device Management System (SDMS) software, that supports the Advanced SCSI Protocol Interface

(ASPI) and the ANSI Common Access Method (CAM). The AIC-7880 operates the SCSI bus at 5

MB/s asynchronously or 10 MB/s synchronously, and bursts data to the host at full PCI speed up to

110 MB/s (at 33 MHz).

The SCSI-2 controller has full PnP recognition, a 64-Byte DMA FIFO and all SCSI signals are ESD

protected up to 2 kV.

The user can connect up to 7 SCSI devices to the AIC-7880, all the SCSI devices are daisy chained

trough one SCSI-Bus cable. This cable must have terminators at both ends; i.e. the beginning device

and end device. Without proper installation of the terminators it will cause a SCSI devices malfunction.

On the PCC-P5L board the terminator is active, when jumper J102 is set to 1-2. On position 2-3 the

termination will be auto dedected.

The following figures illustrate where the terminators can be placed:

Example 1:

Example 2:

The boot devices on the SCSI-2 interface:

- any SCSI-2 harddisk - Syquest removable media

- CD drives - Tapes, MO- and ZIP-Drives

PCC-P5