Themis RES-22XR3, Installation Manual

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1-13
Themis Computer
1—Overview and Specifications
1.6.2 Main Switch Override Mechanism
When an ATX power supply is used, the power button can function as a system sus-
pend button to make the system enter a SoftOff state. The monitor will be suspended
and the storage drive will spin down. Pressing the power button again will cause the
whole system to wake-up. During the SoftOff state, the ATX power supply provides
power to keep the required circuitry in the system “alive.” In case the system mal-
functions and you want to turn off the power, just press and hold the power button
for 4 seconds. This option can be set in the Power section of the BIOS Setup routine.
1.7 Super I/O Controller
The Super I/O chip storage-drive adapter functions include:
• a floppy storage drive controller (industry standard 82077/765 compatible)
• a data separator
• write pre-compensation circuitry
• decode logic
• data rate selection
• clock generator
• drive interface control logic
• interrupt and DMA logic
The wide range of functions integrated onto the Super I/O greatly reduces the num-
ber of components required for interfacing with floppy storage drives. The Super I/O
supports 360K, 720K, 1.2M, 1.44M or 2.88M storage drives, and data transfer rates
of 250 Kb/s, 500 Kb/s or 1 Mb/s.
It also provides two high-speed, 16550-compatible serial communication ports
(UARTs). Each UART includes a 16-byte send/receive FIFO, a programmable baud
rate generator, complete modem control, and a processor interrupt system. Both
UARTs provide legacy speed with baud rate up to 115.2 Kbps, and an advanced
speed with baud rates of 250K, 500K, or 1 Mb/s (for higher speed modems).
Note: All RES systems leave the factory with ATX compliant power supplies pre
installed.