Specifications

Introduction
1–5
− Onboard programming of 5 V and 12 V Flash EPROMs
− Onboard +12 Volt power supply for Flash EPROM programming
− Configurable as 64K or 128K byte window, addressed in the range of D0000h to EFFFFh
− Supports PCMCIA memory card connection via Ampro Memory Card Adapter
− Supported by Ampro SSD Support Software and many third-party operating systems
! 2K-bit configuration EEPROM:
− Stores system SETUP parameters
− Supports battery-free boot capability
− 512 bits available for OEM use
! Watchdog Timer
− Utilizes the onboard real-time clock alarm function
− Timeout triggers hardware reset
! Powerfail NMI triggers when +5 Volt power drops below +4.7 Volts.
1.3.3 Onboard Peripherals
This section describes standard peripherals found on every Little Board/486i.
! Four buffered serial ports with full handshaking
− Implemented with 16550-equivalent controllers with built-in 16-byte FIFO buffers
− Onboard generation of ±9 Volts for RS232C signal levels
− Each channel supports either RS232C (direct connection) or RS485 (via Ampro RS485 Adapter)
− Logged as COM1, COM2, COM3, and COM4 by DOS
! Multimode Parallel Port
− Superset of standard LPT printer port
− Bidirectional data lines
− IEEE-1284 (EPP/ECP) compliant
− Standard hardware supports all four IEEE-1284 protocol modes
− Internal 16-byte FIFO buffer
− Can use DMA for data transfers
! Floppy Disk Controller
− Supports one or two drives
− Reliable digital phase-locked loop circuit
− BIOS supports all standard PC/AT formats: 360K, 1.2M, 720K, 1.44M
! Fast IDE Disk Controller
− A high-speed implementation of a standard IDE hard disk controller
− Supports up to two hard disk drives.