DATA TECHNOLOGY CORPORATION DTC3280A, DTC3280AS (400480-89XX) Data bus: 16-bit, ISA. Size: Half-length, full-height card. Hard drives supported: Up to seven SCSI devices Floppy drives supported: DTC3180A: None DTC3280A: Four 360KB, 720KB, 1.2MB or 1.44 MB drives [Image] CONNECTIONS Function Location 50-pin SCSI connector-external J1 50-pin SCSI connector-internal J2 34-pin data cable connector-floppy drive J3 (DTC3280A and AS only) 4-pin connector-drive active LED J4 USER CONFIGURABLE SETTINGS Function Location Setting » Single-speed floppy supported SW1/switch 7 off Dual-speed floppy supported SW1/switch 7 on » PS/2-type floppy on Drive SW1/switch 8 on Select 2 not supported PS/2-type floppy drive on Drive SW1/switch 8 off Select 2 supported » Floppy drive precomp. is scaled SW1/switch 9 off by data rate: 500KHz=125ns, 300KHz=208ns, 250KHz=250ns Floppy drive precompensation is SW1/switch 9 on 125ns » Floppy drive enabled SW1/switch 10 on Floppy drive disabled SW1/switch 10 off » Factory configured - do not SW2/switch 3 off alter » Factory configured - do not SW2/switch 4 off alter » SCSI parity check enabled SW2/switch 5 off SCSI parity check disabled SW2/switch 5 on » 2KB SRAM selected W1 pins 2 & 3 closed 8KB SRAM selected W1 pins 1 & 2 closed » Floppy drive address 3F2-3F7h W2 pins 1 & 2 closed Floppy drive address 372-377h W2 pins 2 & 3 closed INQUIRY INTERRUPT REQUEST "B " OPTIONS IRQ SW1/switch SW1/switch SW1/switch SW1/switch 4 1 2 3 » IRQ11 off off on off IRQ10 off off off on IRQ12 off on off off IRQ15 on off off off Disabled off off off off BIOS ADDRESS Address SW1/switch 5 SW1/switch 6 » D800h off off C800h off on DC00h on off CC00h on on INTERRUPT REQUEST IRQ SW2/switch 1 SW2/switch 2 » IRQ11 off on IRQ12 on off IRQ10 on on IRQ15 off off SCSI ADDRESS SCSI ID SW2/switch 6 SW2/switch 7 SW2/switch 8 0 on on on 1 off on on 2 on off on 3 off off on 4 on on off 5 off on off 6 on off off » 7 off off off