EXOS 201 NIC Type Ethernet Transfer Rate 10Mbps Data Bus Multibus Topology Linear bus Wiring Type AUI transceiver via DB-15 on sub-connector Boot ROM Available (in firmware) [Image] FACTORY CONFIGURED Jumper Setting J2 Closed J3 Open J9 Open J10 Closed J12 Open J61 Closed ONBARD BUFFER RAM Size J4 J7 128KB Open Open 256KB Open Closed 512KB Closed Open CARRIER SENSE CONFIGURATION Setting J5 » Carrier sense enabled Open Carrier sense disabled Closed Note:Carrier sense should be disabled when using a broad-band transceiver. BOOT ROM Setting J6 Enabled Closed Disabled Open SIGNAL QUALITY CONFIGURATION Setting J11 » Signal quality check enabled Closed Signal quality check disabled Open Note:Signal quality checking should be disabled in any Ethernet version 1 installation. MULTIBUS I/O (SLAVE) ACCESS CONFIGURATION The EXOS 201 supports two simultaneous I/O ports, labeled port A and port B. In addition, the 201 supports either 8-bit or 16-bit memory addressing. When in 16-bit addressing mode, the port A address is selectable via jumper J52 & J53. Jumper J52A-G defines bits 1-7 of the memory address respectively, and J53A-H defines bits 8-15 respectively (when a jumper is closed, the bit that it corresponds to is set to 1; when open, the bit is set to 0.). For expample, if JP52A is closed, and JP52B-G & JP53A-H are open, the memory address selected is 0001h. When in 8-bit addressing mode, JP52A-G select bits 1-7 respectively, and JP53 is inactive. Regardless of the memory addressing mode, port B will always be located 1 byte above port A's address (e.g. Port A = 0001h, Port B = 0002h). Bit 0 is always set to 0 for port A, and 1 for port B. (Open=0, closed=1) MULTIBUS MEMORY ADDRESSING METHOD Memory Address J50 J51 8-bit memory addressing Open Closed 16-bit memory addressing Closed Open 44-PIN ISBX CONNECTOR CONFIGURATION The iSBX connector (IEEE P969 specification), is included for daughterboard options. There are two jumper-selectable interrupt lines (J13 and J14) which should be left open unless an optional daugherboard is installed. If a daughterboard is installed, one jumper or the other must be closed, but not both. JP13 closed selects IR0, JP14 selects IR1. WATCHDOG TIMER CONFIGURATION Setting J15 Watchdog timer enabled Open Watchdog timer disabled Closed MULTIBUS INTERRUPT ACCESS INT J54A J54B J54C J54D J54E J54F J54G J54H 0 Open Open Open Open Open Open Open Closed 1 Open Open Open Open Open Open Closed Open 2 Open Open Open Open Open Closed Open Open 3 Open Open Open Open Closed Open Open Open 4 Open Open Open Closed Open Open Open Open 5 Open Open Closed Open Open Open Open Open 6 Open Closed Open Open Open Open Open Open 7 Closed Open Open Open Open Open Open Open USER PROGRAMMABLE EPROM TYPE Type J55 J56 27128 Closed Open 27256 Open Closed None Open Open MULTIBUS PRIORITY RESOLUTION METHOD Resolution Scheme J57 » Enabled Closed Disabled Open BUS ARBITRATION Setting J58 J59 » Disabled Open Closed Enabled Closed Open CLOCK CONFIGURATION Setting J60 /CCLK and /BCLK bus driven Open /CCLK and /BCLK card driven Closed DIAGNOSTIC LED(S) LED Status Condition 1 On Performing power on self tests 1 Flashing Waiting for host or network initialization 1 Off Card succesfully inserted into network 2 On Data is being transmitted 2 Off Data is not being transmitted 3 On Attempted access to non-existant memory location on multibus 3 Pulsing Multibus cycle in progress 3 Off No multibus cycle in progress