WD7000-ASC and WD7000-FASST Jumper Settings ************************************************************************** Configuration Jumper Options ************************************************************************** The following tables illustrate the various jumper options of the WD7000-ASC SCSI host adapter. A "1" indicates that the jumper is installed; a "0" indicates no jumper installed. *PLEASE NOTE THAT THE DEFAULT SETTINGS SHOWN ARE FOR THE WD7000-ASC AND ARE NOT NECESSARILY THE SAME ON THE WD7000-FASST. ************************************************************************** "W3" - ASC I/O Address Space ************************************************************************** These jumpers are used to change the ASC I/O address space when desired. Address lines SA7-3 are selectable, SA9-8 are fixed at a high level, and all other lines are just driven by the host bus as required. The ASC is currently selected to decode 320-323 (SA9-SA0), the LSB 3 bits are used to select onboard ASC registers; SA9-SA8 are fixed at +5V or a logic "1" level. * Default Configuration: W-3 SA3 1 ³ 0---0 ³ 2 SA4 3 ³ 0---0 ³ 4 SA5 5 ³ 0 0 ³ 6 SA6 7 ³ 0---0 ³ 8 SA7 9 ³ 0---0 ³ 10 SA7 SA6 SA5 SA4 SA3 I/O Address 0 0 0 0 0 3F8H 0 0 0 0 1 3F0H 0 0 0 1 0 3E8H 0 0 0 1 1 3E0H 0 0 1 0 0 3D8H 0 0 1 0 1 3D0H 0 0 1 1 0 3C8H 0 0 1 1 1 3C0H 0 1 0 0 0 3B8H 0 1 0 0 1 3B0H 0 1 0 1 0 3A8H 0 1 0 1 1 3A0H SA7 SA6 SA5 SA4 SA3 I/O Address 0 1 1 0 0 398H 0 1 1 0 1 390H 0 1 1 1 0 388H 0 1 1 1 1 380H 1 0 0 0 0 378H 1 0 0 0 1 370H 1 0 0 1 0 368H 1 0 0 1 1 360H 1 0 1 0 0 358H 1 0 1 0 1 350H 1 0 1 1 0 348H 1 0 1 1 1 340H 1 1 0 0 0 338H 1 1 0 0 1 330H 1 1 0 1 0 328H 1 1 0 1 1 320H* 1 1 1 0 0 318H 1 1 1 0 1 310H 1 1 1 1 0 308H 1 1 1 1 1 300H ASC I/O ADDRESS SPACE JUMPERS ************************************************************************** "W4" BIOS ROM Address Space ************************************************************************** These jumpers can be used to change the BIOS ROM address space when desired. Address lines SA16-13 are selectable, SA19-18 are fixed at a high level, SA17 is fixed at a low level and all other lines are just driven by the host bus as required to access an 8KX8 ROM. The ASC is currently selected to decode CO (SA19-SA13). Address Select (W4) SA19 fixed at +5 V SA18 fixed at +5 V SA17 fixed at 0 V SA16 7 o---o 8 SA15 5 o---o 6 SA14 3 o---o 4 SA13 1 o---o 2 GND ³ ³ 4.7K SA16 SA15 SA14 SA13 BIOS ADDRESS 0 0 0 0 DE00H 0 0 0 1 DC00H 0 0 1 0 DA00H 0 0 1 1 D800H 0 1 0 0 D600H 0 1 0 1 D400H 0 1 1 0 D200H 0 1 1 1 D000H 1 0 0 0 CE00H 1 0 0 1 CC00H 1 0 1 0 CA00H 1 0 1 1 C800H 1 1 0 0 C600H 1 1 0 1 C400H 1 1 1 0 C200H 1 1 1 1 C000H * BIOS ROM ADDRESS SPACE JUMPERS ************************************************************************** "W2" DRQ/DACK Jumpers ************************************************************************** ASC uses DMA channels 5, 6, and 7 with channel 6 being the standard configuration. No other configurations are permitted since a 16 bit host bus is assumed. Also note that the host must turn on the ASC DMA enable first and then enable the system DMA channel. This is required since the DMA line is a tri-state control signal. If this is not done, spurious DMA signals might occur if the host system DMA is enabled first since the ASC will tri-state this signal on power up. Any other I/O card that shares the same DMA channel can also be used to drive this signal to avoid spurious signals. (W2) DRQ7 1 ³ o o ³ 2 * DRQ6 3 ³ o---o ³ 4 DRQ5 5 ³ o o ³ 6 DACK7- 7 ³ o o ³ 8 * DACK6- 9 ³ o---o ³ 10 DACK5- 11 ³ o o ³ 12 DMA CHANNEL CONFIGURATION JUMPERS ************************************************************************** "W1", "W2" IRQ Jumpers ************************************************************************** The ASC supports IRQ channels 3-5, 7, 9-12, and 14-15 with channel 3 being the standard configuration. Since this signal is tri-state driven, the same precaution as the DMA channel enable applies here as well. (W1) & (W2) * IRQ3 1 ³ o---o ³ 2 IRQ15 13 ³ o o ³ 14 IRQ4 3 ³ o o ³ 4 IRQ14 15 ³ o o ³ 16 IRQ5 5 ³ o o ³ 6 IRQ12 17 ³ o o ³ 18 IRQ7 7 ³ o o ³ 8 IRQ11 19 ³ o o ³ 20 IRQ9 9 ³ o o ³ 10 IRQ10 21 ³ o o ³ 22 IRQ CHANNEL CONFIGURATION JUMPERS ************************************************************************** "W5" Terminator Power ************************************************************************** The SCSI bus devices are connected together using a daisy chain cable. This cable should have terminating resistors at each end of the cable. These resistors are designated Z1 and Z2 on the ASC. All SCSI devices between the two ends of the cable should not have the terminating resistor packs but one of them must supply power to these packs via a jumper similar to W5 as shown below: (W5) TRMPWR 1 ³ o---o ³ 2 ************************************************************************** "W7" Dual Speed Spindle ************************************************************************** When the jumper is installed, it enables a dual speed, 360 RPM, floppy spindle. Without the jumper, it disables the dual speed spindle for a single speed, 300 RPM, floppy. (W7) = enable dual speed DRV 1 ³ o o ³ 2 ************************************************************************** "W8" Floppy Write Precomp Select ************************************************************************** With the jumper installed, the write precomp value set is 187 NS (for a 1.2 MB floppy) and with the jumper removed, the write precomp value selected is 125 NS (usually for a 360 KB floppy). (W8) = 187 NS precomp (1.2MB), else = 125 NS precomp (360KB) PRECOMP 1 ³ o o ³ 2 ************************************************************************** "W6" & "W9" Floppy Control ************************************************************************** W6 1 ³ o---o ³ 2 W6 W9 DESCRIPTION 0 0 Onboard Floppy Enabled W9 1 ³ o---o ³ 2 with NO Hard or Combo Card 0 1 Onboard Floppy Enabled with Hard Card only 1 X Onboard Floppy Disabled * FLOPPY CONTROL JUMPERS