Instruction manual

• SCSI Interface:
A TURBOchannel dual SCSI interface chip (TCDS) is connected to the
TURBOchannel bus, but only one NCR53C94 SCSI controller chip interfaces
to the TCDS ASIC and provides a single-ended, 8-bit, 5 MB/s SCSI port. This
port drives one SCSI drop inside the system box and is also available outside
the box for further expansion.
Chapter 8 discusses the TURBOchannel Dual SCSI ASIC.
Hardware Jumpers
Table 3 lists system jumpers, their possible position, and the correspoding
function.
Table 3 System Jumpers
Jumper Position Function
W1 1 to 2 Flash ROM Write Disable
W1 2 to 3 Flash ROM Write Enable
W2 1 to 2 Graphics Monitor as Console
W2 2 to 3 Serial Comm Port as Console
W2 3 to 4 SROM Port as Mini-Console (Digital use only)
W3 1 to 2 Secure console enabled
W3 2 to 3 Secure console disabled
Introduction to the DEC 3000 Models 300/400/500/600/700/800/900 AXP 1–5