Epson Apex 386/33 Canadian Product User Manual - Page 58

Shadow RAM

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Shadow RAM For higher performance, the PEM-3301 has two shadow RAM functions. Shadow RAM is one of the features of the PEM-3301. Your BIOS or diskette will support the following: A 64KB DRAM space allocated for system BIOS shadow RAM A 64KB DRAM space allocated for video BIOS shadow RAM BIOS and video addresses are allocated for shadow RAM. Both sections are 64KB in size. Refer to the table below for more information. Figure 2-15: System and Video BIOS Note that a reserved 128K DRAM space is allocated for shadow RAM. You cannot use it for another purpose even if these functions are disabled. Refer to the table below for more information. Table 2-6: Shadow RAM Control Port Chapter 2: Setting Up Your System 19

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Shadow RAM
For higher performance, the PEM-3301 has two shadow RAM func-
tions. Shadow RAM is one of the features of the PEM-3301. Your BIOS
or diskette will support the following:
A 64KB DRAM space allocated for system BIOS shadow
RAM
A 64KB DRAM space allocated for video BIOS shadow RAM
BIOS and video addresses are allocated for shadow RAM. Both
sections are 64KB in size. Refer to the table below for more informa-
tion.
Figure 2-15: System and Video BIOS
Note that a reserved 128K DRAM space is allocated for shadow RAM.
You cannot use it for another purpose even if these functions are
disabled. Refer to the table below for more information.
Table 2-6:
Shadow RAM Control Port
Chapter 2: Setting Up Your System
19