ExpressStationhard diskaccess light power light\. /Shadow RAMClock/calendardiskette disk&eaccess light release latchpokerIreset buttonbuttonParallelcoverscrew wrallel oortpower outlet\/ ‘/“““on slotsserialPO*mouse’ Iport keyboardDotiComputer SpecificationsCPU and MemoryCPU Intel 25 MHz 486SX, or 33 MHz 486DXmicroprocessor; simulated 8 MHzprocessor speed selectable throughsoftware or keyboard commandSystem memoryBIOS4MB RAM standard on one 4MB SIMM;expandable using 1MB, 2MB, 4MB, or 8MBSIMMs up to 32MB (when 8MB SIMMs areavailable); SIMMs must be 80ns, 36bit,72-pin, gold-leaded, fast-page mode type256KB two-part system BIOS includingvideo BIOS in two FLASH ROM devices;write-protection available through jumperand softwareVideo RAMCache memoryInterfacesMonitor1MB standard8KB internal cache integrated into themicroprocessor; optional 128KB Intel 485Turbo Cache module can be installed onmain system board (128KB cache modulestandard on 486/33 model); write-through, two-way set associative cachememory and controller; operationcontrollable through softwareMath coprocessor Socket for optional Intel 25 MHz 487SXcoprocessor (allowable on 486SX/25model only)serialSCSILANMouseKeyboardOption slotsSpeakerControllersDisketteHard diskVideoOptional shadow RAM to copy system,video, or external BIOS information fromROM to RAM; software selectableSocketed DS1287 real-time clock, calendar,and 64-byte CMOS RAM forconfiguration; integrated battery withIO-year life15-pin, D-shell analog connector; supportsstandard VGA, multi-frequency, and high-resolution monitors25-pin, D-shell connector; supports IBMAT compatible or PS/2 compatible(bidirectional) signals; selectable throughsoftwareTwo RS-232-C 9-pin, D-shell connectors;asynchronous; up to 56K baud rateInternal connector for SCSI hard disk driveon drive riser card (single-ended modeonly), terminator soldered onto riser card;external SO-pin, fine-pitch connector onback panel for up to seven external SCSIdevices (six if internal device is used);external SCSI terminator includedOne 15-pin AUI (Attachment UnitInterface) D-sub connector; can connectexternal MAU (Medium Attachment Unit)to provide interface with other networksOne TPE (Twisted Pair Ethernet),10BASET connectorMini DIN, 6-pin connector for PS/2compatible mouse or other pointing deviceMini DIN, 6-pin connector for PS/2compatible keyboardTwo 32-bit EISA expansion slots (16-bitand 8-bit ISA compatible) on option cardriser boardInternal speaker integrated into powersupply; programmable at I/O port 61h;operation controllable through softwareController on drive riser board supportsone 3.5 inch 1.44MB, third-height diskettedriveTwo interfaces on drive riser boardsupport either one IDE drive or oneinternal SCSI hard disk drive; 3.5inch,third- or half- height form factorWD90C30 controller; supports resolutionsup to 1024 x 768 in 256 colors; compatiblewith MDA, CGA, Hercules, EGA, andVGA standardsExpressStation Computer 11/2/92 ExpressStation-