ARCNET Adapter (260-6505) Settings Faxback Doc. # 5481 LEGEND S1 1 - 8 Node ID Select S2 1 - 3 I/O Base Address Select 4 - 6 Memory Base Address Select 7 - 8 RAM Offset Select EXT Extended Timeout Select IRQ Interrupt Select ROM Enable Auto-boot PROM SETTING SWITCHES AND JUMPERS A. Each switch is equivalent to a logical zero (0) when set to set to the ON or CLOSED position and a logical one (1) when set to the OFF or OPEN position. 1. For lever-type switches, push the switch up (towards the OFF position) to set it to a logical one, or down to set it to a logical zero. 2. For slider-type switches, DOWN is the same of OFF. 3. For rocker-type switches, press in as far as possible on the side of the switch labeled ON to set it to the ON position. 4. To select a jumper, connect the two pins of the jumper with a shorting plug. C. SETTINGS FOR NETWARE 1. The most common switch settings are: A. I/O base address 2E0 B. RAM memory address D0000 C. IRQ 2 2. In the S2 bank of switches, the OFF position would be for switches 2,5, and 6. Switches 1,3,4,7, and 8 are ON. 3. With different hardware configurations or other software, other switch settings may be required. D. SETTING THE NODE ID 1. The eight switches in group S1 are used to set the PC identification number of node ID. A. Each node attached to the network must have a unique node ID. A node ID of zero (0) is not permitted. B. Switch 1 serves as the least significant bit (LSB) for the node ID. C. The following chart shows how to set the node ID to a decimal number. SWITCHES LSB 1 2 3 4 5 6 7 8 ────────────────────────────── Switch - - - x - x x x On/Closed = 0 Group S1 x x x - x - - - Off/Open = 1 ────────────────────────────── Value 1 2 4 8 16 32 64 128 Example: Node ID 23 Decimal = 1 + 2 + 4 + 16 = 11101000 Binary D. After setting these switches, be sure to write the node ID on the identifying label located on the outer edge of the board. E. Setting the I/O Base Address 1. Switches 1 - 3 in switch group S2 are mapped to the table of eight hexadecimal I/O base addresses shown below. I/O I/O Address Switches Address Switches Hex 1 - 3 Hex 1 - 3 ────────────────────────────────────────────────── 260 0 0 0 300 1 0 0 290 0 0 1 350 1 0 1 2E0 0 1 0 380 1 1 0 2F0 0 1 1 3E0 1 1 1 ────────────────────────────────────────────────── 2. Remember 0 = On/Closed 1 = Off/Open F. Setting the Base Memory (RAM) Buffer Address 1. The memory buffer requires only 2K of a 16K block of RAM. The base of this 16K block can be located in any one of eight positions. 2. S2 switches 4 - 6 select the base address of the 16K block. Within that 17K address space, the buffer may be assigned any one of four positions, determined by the offset, S2 switches 7 - 8. Base Address --> Offset 2K 0 2K 1 2K 2 2K 3 8K ROM 3. These switches are mapped to the table of 32 hexadecimal base memory buffer addresses for the board shown below. For example, for D0000, set S2, 4-8 to 011 00. 4. Three additional expansion cards may utilize the three unused 2K blocks of memory. The remaining 8K is reserved for ROM. RAM Switches RAM Switches Address 4 - 8 Address 4 - 8 ────────────────────────────────────────────────── C0000 000 00 D4000 100 00 C0800 000 01 D4800 100 01 C1000 000 10 D5000 100 10 C1800 000 11 D5800 100 11 C4000 001 00 D8000 101 00 C4800 001 01 D8800 101 01 C5000 001 10 D9000 101 10 C5800 001 11 D9800 101 11 CC000 010 00 DC000 110 00 CC800 010 01 DC800 110 01 CD000 010 10 DD000 110 10 CD800 010 11 DD800 110 11 D0000 011 00 E0000 111 00 D0800 011 01 E0800 111 01 D1000 011 10 E1000 111 10 D1800 011 11 E1800 111 11 ──────────────────────────────────────────────── G. Setting the Timeouts and Interrupts 1. The jumper set labeled EXT is used to determine the timeout parameters. The two jumpers in this set are normally left open. 2. IRQ jumper set is used to select the interrupt level. The numbers next to each of the five jumpers correspond the interrupts. Jumper Function 2 IRQ2 3 IRQ3 4 IRQ4 5 IRQ5 7 IRQ7 INSTALLING THE AUTO-BOOT PROM A. This option allows a diskless PC to access the network by booting from the network disk. The PROM can also be used in PCs having floppy and/or hard disk drives. B. The PROM requires 8K of memory space on the board. To enable the PROM, the jumper labeled ROM must be selected by connecting the staking pins with a jumper. 1. Position the notch on the PROM over the notch on the socket. 2. Check to make sure each pin of the PROM is aligned with the receptacles on the socket. 3. Push the PROM into the socket gently, but firmly, making sure not to bend the pins on the PROM. (dkh-08/03/93)