
ÉlanSC310 Microcontroller Evaluation Board User’s Manual
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• Application (DOS) ROM space is 16-bits wide (two or four devices must be
used).
• The DOS ROM sockets (U16–U19) can only be populated with the following
(the AMD recommended part is also listed):
– 256Kx8 ROM/EPROM (AMD 27C020)
– 512Kx8 ROM/EPROM (AMD 27C040)
– 256Kx8 Flash (AMD 12-V 28F020 or 28F020A)
NOTE:
512Kx8 Flash can be supported after a minor board rework. Contact
your AMD FAE for more information.
• Some ISA signals are not available when using Local Bus mode. Refer to the
ÉlanSC310 Microcontroller Data Sheet and Programmer’s Reference Manual
for detailed information on the ÉlanSC310 functionality.
• The RTC RAM (integrated in the ÉlanSC310 microcontroller)—which is used
to maintain time, date and system configuration data—is cleared (lost) when
power is removed from the V
CC
& AV
CC
power planes.
• Connectors are available to test local bus operation and modes. However due
to bus loading, High Speed operation is not possible without depopulating
several components.
BIOS
The ÉlanSC310 microcontroller evaluation board comes with SystemSoft BIOS
programmed into the ROM in socket U20, and PhoenixPICO BIOS programmed
into the ROM in socket U59. Jumper JP32 selects which ROM socket is used when
the system boots (JP32 =1-2 selects socket U59, JP32=2-3 selects socket U20).
Each BIOS is an evaluation version specific to the evaluation board.
An evaluation diskette for each BIOS is shipped with your kit. The BIOS ROM
images are located on their respective diskettes.
NOTE:
These are evaluation BIOS’ only. Each BIOS has been tested on the
evaluation board and a list of know errata is available on the AMD Utilities diskette.
For the most recent errata listing, contact your local AMD representative.
evalbd.book : ch2 Page 5 Thursday, August 8, 1996 2:34 PM