Specifications

Theory of Operation
EPC-100 Hardware Reference 4-4
Upgrading Main System Memory
At the time of writing, the the following sizes of 60 or 70ns Fast Page Mode or EDO
DRAM were useable:
Type Row/Column Total Size (MB) Number of SODIMMs
512Kx32 10/9 4 2
1Mx32 10/9 or 10/10 8 2
2Mx32 10/10 or 10/11 16 2
4Mx32 11/10, 11/11, or12/10 32 2
4Mx32 11/10, 11/11, or12/10 64 4
8Mx32 12/11 128 4
16Mx32 12/12 256 4
Table 4-1. Memory Upgrade DRAMs.
Memory Map
The 2
32
byte physical address space seen by the Intel Pentium occupies three areas:
1. The area between 0 and 1 MB is largely defined by the IBM PC/AT
architecture.
2. The area between 1 MB and 256 MB depends on how much DRAM is
installed in the EPC-100.
Memory addresses from the Pentium or Pentium Pro between 0 and 4 MB
(0FFFFFFFh) is mapped as follows: