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Table of Contents Table of Contents Section 1 Applications Support ... ------------ 1-1 Section 2 Introduction ________ ............... _. __ 2-1 Section 3 DP8390 Evaluation Board -------··· 3-2 Cable Installation --............... ----- 3-11 Section 4 - Software Reference Software Update -. -............... ---- 4-4 Computer Conferencing . ----------- 4-5 Demostration Network Software ---- 4-7 NIA Access Software ... ---------. -. 4-9 Network Load Simulator ... --------- 4-17 Network Evaluation Software------- 4-21 Writing Drivers for DP8390 ......... -- 4-25 Section 5 - Hardware Reference DP8390 Introductory Guide _... .. 5-1 Hardware Design Guide -. .. .. .. 5-9 Guide to Loopback -----. ......... 5-17 StarLAN with the DP8390 . .. .. .. 5-26 Section 6 Tranceiver Evaluation Kit . .. .. .. 6-1 SECTION 1 APPLICATION CONTACTS National Objectives Semiconductor Preliminary Corporati on July 1986 OBIECTIVE OF DP839EB CHEAPER/ETHER DEMONSTRATION KIT The Cheaper/Ether demonstration kit is intended to provide designers With tools tor evaluations and development of networking products usmg the DP839X chip set. The kit supports Ethernet, Cheapernet and Starlan networks as described in the IEEE 602.3 standard. All required documentation has been provided inside this binder. including the circuit diagram. PAL equations and option set­ tings. Software tools are also provided as guides to developing drivers tor the DP8390 Network Interface Controller. It is important to read all hardware and software manuals prior to inst.a1l1ng the demonstration kit. IN CASE OF PROBLEMS... If yC111 encounter problems not addressed in the documentation, contact your local Natianal Semicon­ ductor Field En&i."leer or Field Sales Office. They will provide you with any additional support you may require. I! you have ~ier "echnicai !nquiries regardin& operation of ~'lie JP839X chip set contact !'l'ational Semiconductor at (408) 72l 4247 (for the DP8390) or (408) 721 3M7 (DP8392 and !)PB391). - r SECTION 2 INTRODUCTION ~Introduction Advanced Peripherals Ell'lernet ,___......__ _, CneatJernet .-------. Memory Local Maa Support Area Storage Network Graph lea Display Control Today's computer systems and information processing needs have created a huge demand for Local Area Networks (LANs). The IEEE 802.3 Standard for Ethernet/Cheapernet and Starlan has become the most popular networking solution. National Semiconductor provides a complete three chip solution for an entire 802.3 design as well as supplying a broad range of products to fill the needs of network design engineers. The chipset consists of the OP8390 Network Interface Controller (NIC), the DP8391 Serial Network Interface (SNI) and the OP8392 Coaxial Transceiver Interface (CTI). To place your name on the mailing list for design information updates and to receive further information on National's Advanced Peripherals please return the enclosed card or contact your local National Semiconductor Sales Office. THE CHIPSET FEATURES INCLUDE DP8390 DP8391 DP8392 • Interfaces with 8-, 16-, and • 10 Mbitlsec Manchester • Integrates all transceiver 32·bit microprocessor systems encoding/decoding with electronics except signal and paws isolation • Implements simple, versatile receive clock recovery buffer management • Patented digital phase locked loop • Innovative design minimizes extemal component count • Utilizes low power microCMOS decoder requires no precision process external components • Externally selectable CD heartbeat allows operation with IEEE 802.3 • Includes • Decodes Manchester data with up to compatible repeaters - Two 16-bit OMA channels ± 20 ns of jitter -16-byte internal FIFO with • Squelch circuits at the receive and • Designed for rigorous reliability programmable threshold collision inputs reject noise requirements of IEEE 802.3 -Network statistics storage • Connects directly to the AUi cable • Squelch circuitry at all inputs rejects noise SECTION 3 NETWORK EVALUATION BOARD ,,., : ...... :.. ·~· ..... ~ .·~ .. ··,! ~ .·I ~-f Ul'lt 1111:1t lilllm' t1·:t·:1·:ttu.l.t l·:V/\l.11/\T I c >N IU )/\Hit I \ c National Semiconductor Corp. .,, DP839EB Network CD w Evaluation Board Riv C co m m OVERVIEW NETWORK INTERFACE OPTIONS z The National Semiconductor DP839EB Evaluation Board The evaluation board supports three physical layer options: CD provides IBM PCs and PC Compatibles with Ethernet. Ethernet, Cheapernet and STARLAN. When using Ethernet, Cheapemet and STARLAN• connections. The evaluation a drop cable is connected to an external transceiver which i board is compatible with the PC-bus and requires only a Ya ii connected to a standard Ethernet networtt. (See Fl(JUf9 0 Size Slot for installation. The evaluation board utilizes Na­ 7). When using Cheapemet. a low cost version of Ethernet, ...=-:" tional Semiconductor's Ethemet/Cheapemet chipaet con­ a transceiver is available on-board allowing direct connec­ sisting of the DP8390 Networtt Interface Controller, the tion to the network via the evaluation board. (See Figure 2). m DP8391 Serial Network Interface and the DP8392 Coaxial When using a ST ARLAN network, an optional daughter card Transceiver Interface. The OMA capabilities of the DP8390, replaces the SNI function and implements the required elec­ c- coupled with tronics to interface the DP8390 NIC to ST ARLAN. = 8 kbytes of buffer RAM, allow the Network Thia con­ I» Interface Adapter to appear u a standard 110 port to the figuration ii Hlustrated in Figure 3. No software changes are ... system. needed for conversion between any of the described config­ 0-· urations. HARDWARE FEATURES :::s • HaH-Size IBM PC 110 Card Form Factor HARDWARE DESCRIPTION m • DP8390 Networtt Interface Controller with OMA The block diagram shown in Figure 4 illustrates the architec­ 0 ture of the Network Interface Adapter. The system/network I» • 8 kbyte on-board Multipacket Buffer interface is partitioned at the DP8390 Network Interface • Clean OMA Interface to IBM-PC Controller (NIC). The NIC acts as both a muter and a slave a. • Ethernet Interface via 15-Pin D Connector on the local bus. During reception or transmillion of pack· • Cheapemet Interface via BNC Connector eta. the NIC is a muter. When accessed by the PC, the NIC becomes a slave. The NIC utilizes a local 8-bit data bus • Startan Support with Optional Daughter Card and 8-Pin Modular Phone Jack· connected to an Bk x 8 Static RAM for packet storage. The 8k x 8 RAM is partitioned into a transmit buffer and a re­ • DP8391 Serial Network Interface ceive buffer. All outgoing packets are flrat assembled in the • OP8392 Coaxial Transceiver Interface (For Cheapernet) packet buffer and then transmitted by the NIC. All incoming • Low Power Requirement packets are placed in the packet buffer by the NIC and then transferred to the PC's memory. The transfer of data be­ SOFTWARE FEATURES tween the evaluation board and the PC ii accomplished us­ • No Software changes for conversion between Ethernet/ ing the PC's OMA in conjunction with the NIC's Remote Cheapemet and STARLAN OMA. Two LS374latchesimplementabidirectional110 port • Demonstration and diagnostic software available with the PC bus. The 8-bit transceiver (LS245) allows the PC TRANSCDYER TVF/1111-1 FIGURE 1. Ethernet Connection >z I ....._. lllM •• ........,....,_of-..__....,._ColpcnllDn. .. STAAL.AH•• a......,_ of AT&T. co STARU.N OAUGHttR CARD INSTALLED BNC T CONNECTOR WODUW PHONE ------­ CONNECTOtt Tl.IF/91711-3 FIGURE 3. STARLAN Connector FIGURE 2. Chupemet Connector LOCAL BUS IBM PC BUS 0 p ..............i a BNC 3 t OPllto 1 NIC ETHERNET CTI SNI Ol-15 STARLAN IK x I PHONE STAllC RAM 00-07 JACK AO-M 32 x a PROM 00-07 TUF/91711-4 FIGUAE4 to accesa to the NIC's internal registers for programming. A work Load Simulator, ii a program that limulates network 32 x 8 PROM located on the evaluation bo9rd contains the loads based on statistical distributions of packet sizes, unique Physical Address Uligned to each boltd. bursls and Intervals. NLS Is useful for performance mea­ Since the NIC is accessing 8-bit memory, only a single dem­ surement and debug of software drivers. NES, Netwo11t ultiplexing latch is required for the lower 8-bits of address. Evaluation Software, coclliltl of sample software drMn An LS373 Is provided for this pwpose. implementing a low level Interface to the evaluation boltd. A 20L8 PAL provides the addr811 decoding and support for LOCAL MEMORY MAP OMA handshaking and wait state generation. The DP8390 NIC accesses an 8k x 8 buffer RAM located in SOFTWARE SUPPORT its 84 kbyt• memory space. This buffer RAM II used for temporary Storage of receive and nntmit packets. Data The evaluation board provides a simple programming int•· from this RAM Is transferred between the host (the PC) and face for development of software. Several software pack­ the evaluation board using the OP8390 NIC's remote OMA ages are provided for evaluation and development of net· channel. An ID address PROM, containing the physical ad­ works using the DP8390 Chip set. SDEMO is a demonstra· dress of the evaluation board is allO mapped into the mem­ tion program that provides a low level interface to the ory space of the NIC. DP8390 NIC for transmission and reception of packets. Note Plllll decoding 11 pei1omlld on tM PROM encl RAM wtllctl ..,_. SDEMO supports register dumps and simple register modifi. in ltllM devlcel ~ at olW lcalionl In llMI 1411 lll9lllOIY cation. CONF Is a conferencing program which supports epece. The ftrlt occurrM01 of-fW PROM and RAM .. UMCI for~ simple message transfer. WORKSTAT and SERVER sup­ grwnming purpolll.
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