PC/II+vxe   Single-board 4"x4" Computer
Preliminary Information

The PC/II+vxe is a rugged single-board computer with a wide range of features that made us famous. This board is compliant to the Megatel 4x4Family mechanical and pin specification, and is interchangeable on designs which use the PC/+Vsc and PC/+Vs boards, mating QTB breakout boards or to custom boards using the 4x4Family (+Vs,+Vsc) interfaces. PC/104 connectivity is also available.

It is available with a broad set of options that can be mixed in any combination to maximize price and performance. It features a 20MHz V40HL processor, a National PC97307 Super I/O, an Intel/Chips 65550 Video controller for SVGA CRT and 8- to 24-bit flat panels, and an Adaptec 6360 SCSI-2 controller. The board uses a 256KB BIOS flash, offers a user Flash Array of 2 to 8MB in size, and offers a Disk-on-Chip 32-pin DIP socket for user population of an additional 2MB - 144MB of flash disk. Many other peripheral options are available. 

The PC/II+vxe PCB is manufactured on FR4 with all parts mounted on the top (component) side of the board (with the single exception of  the Disk on Chip socket - this optional 32-pin DIP socket is provided on the bottom of the board), and it measures 100mm x 100mm (4" x 4"). Latest technology was used in the design of this board to provide the right combination of performance, low power, ruggedness, small size and compatibility.

We think you'll agree that the outstanding features, low power and low price all combine to make this, the board of choice for upgrading your applications and for new design-ins.

Technical Reference Manual (PDF, 757Kb)
Datasheet (PDF, 266k)

Photographic Image ( JPG, 80 Kb)

Selection Guides

Calculator : Design your own PC/II+vxe


PC/II+vxe Summary

  • V40HL 20MHz Processor with 640KB main memory

  • 256 KB BIOS Flash with Shadow DRAM

  • Altera PLD

  • National PC97307 Super I/O

  • Floppy Disk Controller - for up to 2 Drives

  • AT Keyboard Controller

  • Optional Watchdog & Power Monitor

  • Optional Flash Array - 2MB, 4MB or 8MB

  • Optional Flash Disk - 32-pin DIP socket for user Disk-on-Chip, 2 - 144 MB

  • Optional Intel/Chips 65550 CRT/Panel Controller (SVGA/8/16/24-bit Panels) with 2MB Video EDO DRAM

  • Optional Adaptec 6360 SCSI-2 Controller

  • Optional 2 Full 16550 RS-232 Serial Ports

  • Optional 1 V40 two-wire RS-232 Serial Port

  • Optional 1 SPP / EPP / ECP Parallel Port

  • Optional Mouse

  • Optional RTC (Y2K) provided by PC97307

  • Optional PC® Bus Support


PC/II+vxe Features

  • V40HL microprocessor
  • 20 MHz CPU clock frequency
  • PC® compatible BIOS and architecture
  • 256KB BIOS Flash
  • 2MB, 4MB or 8MB of User Flash Array
  • 640 KB User EDO DRAM
  • PLD technology on-board
  • 8 Levels of Interrupt (IBM standard)
  • 3 DMA Channels
  • 3 16-bit Counter Timers
  • Chips Super VGA & Panel Video Controller
  • Both 8/12-bit panel support through standard 4x4Family 96-pin Peripheral I/O connector, and 8/24-bit panel support via 36-pin header
  • 2MB 512Kx32 EDO DRAM Video memory
  • 1024 x 768 display w/75Hz refresh
  • 64-bit graphics engine
  • supports many STN, TFT/MIN LCD, and EL panels, 16M colors on 24-bit TFT LCDs, 4K colors on STN LCDs, 64 gray scales on mono LCD
  • On-board 8-bit PC® Bus expansion (supports up to 4 external slots)
  • Adaptec 6360 standard SCSI-2 controller
  • Standard IBM PC® Hard Disk BIOS support via SCSI port
  • National PC97307 Integrated CMOS Floppy Disk Controller
  • Software compatibility with the PC8477, a superset of the mDP8473, NEC mPD765A and N82077
  • Support for 5.25" and 3.5" drives
  • 16-byte FIFO
  • Supports 250, 300, 500 Kbps or 1 Mbps standard data rates
  • Supports MFM, and perpendicular formats
  • Can Use 720 KB, 1.2 MB, 1.44 MB or 2.88 MB Drives
  • Will support up to two drives directly (four with external logic)
  • Multi-mode Parallel Port
  • Supports two SPP modes (for PC/AT, PS/2 and Centronics interfaces)
  • Supports two EPP modes (1.7 and 1.9) per/ IEEE 1284
  • Supports ECP mode per/ IEEE 1284 Level 2
  • Provides a printer power-up protection circuit
  • National PC97307 Integrated Standard 8042AH KBC
  • Standard Keyboard Port
  • Standard Mouse Port available on 2-pin header
  • Mouse and Keyboard ports protected by on-board filters
  • National PC97307 Integrated Dual Serial I/O Controller (UART), supports 2 full 16550A-compatible RS232 ports, with selectable bauds up to 115.2 Kbps
  • 1 V40 two-wire serial RS232 port (used via BIOS calls)
  • Maxim ESD-hardened transceivers used for all RS232 signals
  • National PC97307 Integrated RTC with battery backup
  • 2uA maximum draw during power-down
  • Century calendar with automatic leap year, is Y2K compliant
  • Alarm and Periodic interrupt support
  • Two-bank 242-byte CMOS RAM used for system configuration and/or user data
  • Peripheral I/O – 96-pin DIN Eurocard (32x3 .100" grid)
  • PC® bus option – 64-pin 8-bit header
  • Full Video – second video output option 36-pin header provides simultaneous 24-bit panel and VGA output
  • Flash Disk (SSD) 32-pin DIP Socket Option
  • Watchdog & Voltage Power
  • Hardware and Software Enable
  • Hardware and Software Strobe
  • When enabled, 1 second failures produce system Reset
  • Status LED
  • Only 100 mm x 100 mm, 4" x 4"
  • Requires only +5V for operation; small +3.3V requirement is supplied by on-board regulator
  • Surface Mounted, Single-side (SSD DIP-32 can be ordered and will be bottom-mounted)
  • Temperature range 0C - +70C operating; -20C - +85C storage

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