RadiSys EPC-5A, Справочное руководство по аппаратному и программному обеспечению

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EPC-5A Hardware & Software Reference Manual
Page 48
5 5
The core logic system support provided by the R400EX includes the following:
RadiSys
R400EX
PC-
Compatible
Features Real Time Clock Provides Motorola 146818A-
compatible real time clock and
alarm with 114 bytes of battery-
backed CMOS memory. The RTC
also generates a periodic interrupt.
Access to the CMOS memory is
through registers 070h and 071h in
an index/data fashion.
Keyboard/Mouse
Controller Implements a 8042-Compatible
keyboard controller.
Cache Supports L1 write-through cache.
Shadow Shadow BIOS in DRAM.
PC Speaker/Port B
Functionality Port B register is located at 061h.
RadiSys
R400EX
Core System
Support
Features DRAM Refresh
Controller Supports two banks of SIMMs as
Fast Page Mode (FPM), Extended
Data Out (EDO) or Flash SIMMs.
Second bank start address is
configurable. Supports EDO/FPM
memory type detection. SIMM
types cannot be mixed.
Power
Management
Support This interface is not used on the
EPC-5A.
Programmable
Chip Select Units
(4) This interface is not used on the
EPC-5A.
IDE Interface This interface is not used on the
EPC-5A.
Table 5-1. R400EX Features.
Memory
The following memory options are available: 4 MB, 8 MB, 16 MB, 32 MB and
64 MB. (Check with RadiSys Technical Support for 128 MB and 256 MB
configurations.) Two SIMM sockets are available. See Chapter 8, Upgrades, for
memory upgrade instructions.