Supero SUPER P6DLF, User Manual

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1-17
Chapter 1: Introduction
obtain the highest system reliability, be certain that your AT power
supply pr5 VDC with a voltage range b4.95 VDC
(minimum) and +5.25 VDC (maximum).
It is highly recommended that you use a high quality power supply.
Additionally, in areas where noisy power transmission is present,
you may choose to install a line filter to separate noise from the
computer. You can also install a power surge protector to help
avoid problems caused by power surges.
1-7 National Semiconductor Super I/O Controller
The National Semiconductor 87307 Super I/O Controller incorpo-
rates an IDE control logic, two full function serial ports, an IEEE
1284 parallel port, industry standard floppy disk controller with 16
byte FIFO, Real Time Clock and an 8042 compatible keyboard con-
troller all in one chip.
The IDE interfaces provide up to Mode 4 support. The two serial
ports are software compatible with the Fast UART 16550. The par-
allel port is EPP (Enhanced Parallel Port) and ECP (Extended Ca-
pabilities Port) compatible, including level 2 support. It includes a
protection circuit against damage caused when the printer is pow-
ered up. EPP mode provides for greater throughput than Compat-
ible or Extended modes by supporting faster transfer rates and a
mechanism that allows the host to address peripheral device regis-
ters directly. Faster transfers are achieved by automatically gener-
ating the address and data strobes. EPP is compatible with both
Compatible and Extended mode parallel-port devices.