Technical data

Overview
1–4
DIGITAL HiNote Ultra 2000 Service Guide
ISA Bus Devices
The ISA bus interface is provided by the PicoPower V3 chip.
Audio
Audio support is provided by the ES1878 chip. This chip provides the following functions:
Monophonic full-duplex operation using two DMA channels.
I
2
S interface to internal stereo D/A for external Zoomed Video port.
Complete general interrupt mapping including the sharing of all interrupts.
Support for 16-bit Stereo, FM Synthesizer, MPU-401, and MIDI.
Self-timed joystick port.
Hot docking 6-pin interface to expansion audio mixer (ES978).
BIOS
The system BIOS is implemented using the Intel 28F002BX-T 2MB Boot block Flash ROM.
System Command Processor
The System Command Processor is implemented using the Hitachi H8 IKAP II processor.
This processor provides the following functions:
Simultaneous support of two external PS/2 ports and the internal Touch pad.
I
2
C bus master for communication to:
Status LCD
EEPROM
Docking interface components
Hot Key interface.
Secure password protection.
System power plane control and power sequencing.
Battery management interface for charging and the Smart battery information.
Status LCD and device monitoring interface.
Active thermal interface for CPU thermal management.
Internal keyboard scanning.
Super I/O
I/O support is provided by the National Semiconductor PC87338 chip. This chip supports the
following functions:
Floppy disk controller with Japanese floppy support.
IEEE 1284 Parallel port.
Serial infrared support – IrDa 1.1 (115Kbps and 4Mbps).
16550 UARTs.
Full Plug-and-Play support.