(exactly one of SW3-1 and SW3-2 should be on; the other should be off) SW3-1 Select standard address range (17772520) SW3-2 Select non-standard address range set by jumpers: E to D 772440 F to D 776300 G to D 777460 (enable as many units as you have transports with SW3-3 through 3-6) SW3-3 Enable unit 0 (at base CSR and unit 0 VECTOR) SW3-4 Enable unit 1 (at base CSR+4 and base VECTOR+4) SW3-5 Enable unit 2 (at base CSR+10 and base VECTOR+10) SW3-6 Enable unit 3 (at base CSR+14 and base VECTOR+14) SW2-8 On: unit 0 VECTOR is 224 Off: unit 0 VECTOR set by SW2-7 through SW2-1 SW2-7 base VECTOR bit 08 SW2-6 base VECTOR bit 07 SW2-5 base VECTOR bit 06 SW2-4 base VECTOR bit 05 SW2-3 base VECTOR bit 04 SW2-2 base VECTOR bit 03 SW2-1 base VECTOR bit 02 (VECTOR bits 00-01 are always zero) SW1-1 On=RUN; Off=RESET. Normal position is RUN. SW1-2 Special Formatted/Streaming Daisy Chain Option. Normal positon is OFF. SW1-3 On=16-word DMA bursts. Off=4-Word DMA bursts. SW1-4 On=Formatted transport operation; Off=Streaming tape operation. SW2-9 On=select CDC GCR mode. SW2-10 On=allow extended interblock gap in streaming mode; Off=allow only normal interblock gap. SW3-7 Off=normal operation; On=include delay for VAX Diagnostics. SW3-10 Off=normal write data strobe; On=inverted write data strobe. SW3-8 On=allow software selection of density mode; Off=normal.