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H8DMT/H8DMT-IBX/H8DMT-F/H8DMT-IBXF User’s Manual
1-10
1-8 Power Supply
As with all computer products, a stable power source is necessary for proper and
reliable operation. It is even more important for processors that have high CPU clock
rates.
The H8DMT accommodates 12V proprietary power supplies. Although most power
supplies generally meet the specifications required by the CPU, some are inadequate. A
2 amp current supply on a 5V Standby rail is strongly recommended.
It is strongly recommended that you use a high quality power supply that meets 12V
ATX power supply Specification 1.1 or above. Additionally, in areas where noisy power
transmission is present, you may choose to install a line filter to shield the computer
from noise. It is recommended that you also install a power surge protector to help avoid
problems caused by power surges.
1-9 Super I/O
The disk drive adapter functions of the Super I/O chip include a floppy disk drive
controller that is compatible with industry standard 82077/765, a data separator, write
pre-compensation circuitry, decode logic, data rate selection, a clock generator, drive
interface control logic and interrupt and DMA logic. The wide range of functions
integrated onto the Super I/O greatly reduces the number of components required for
interfacing with floppy disk drives.
The Super I/O provides two high-speed, 16550 compatible serial communication ports
(UARTs), one of which supports serial infrared communication. Each UART includes a
16-byte send/receive FIFO, a programmable baud rate generator, complete modem
control capability and a processor interrupt system. Both UARTs provide legacy speed
with baud rate of up to 115.2 Kbps as well as an advanced speed with baud rates of
250K, 500K, or 1 Mb/s, which support higher speed modems.
The Super I/O supports one PC-compatible printer port (SPP), Bi-directional Printer Port
(BPP), Enhanced Parallel Port (EPP) or Extended Capabilities Port (ECP).
The Super I/O provides functions that comply with ACPI (Advanced Configuration and
Power Interface), which includes support of legacy and ACPI power management
through a SMI or SCI function pin. It also features auto power management to reduce
power consumption.
The IRQs, DMAs and I/O space resources of the Super I/O can be flexibly adjusted to
meet ISA PnP requirements, which support ACPI and APM (Advanced Power
Management).
WARNING: To prevent the possibility of explosion, do not use the wrong type of
onboard CMOS battery or install it upside down.