Chapter 3 Award BIOS Setup 59
Shadowing copies firmware from ROM into system RAM, where
the CPU can read it through the 16-bit or 32-bit DRAM bus.
Firmware not shadowed must be read by the system through the 8-
bit X-bus. Shadowing improves the performance of the system
BIOS and similar ROM firmware for expansion peripherals, but it
also reduces the amount of high memory (640 KB to 1 MB) avail-
able for loading device drivers, etc.
Enable shadowing into each section of memory separately. Many
system designers hardwire shadowing of the system BIOS and
eliminate a System BIOS Shadow option.
Video BIOS shadows into memory area C0000-C7FFF. The remain-
ing areas shown on the BIOS Features Setup screen may be
occupied by other expansion card firmware. If an expansion
peripheral in your system contains ROM-based firmware, you need
to know the address range the ROM occupies to shadow it into the
correct area of RAM.
Summary of Contents for All-in-One Super7 Single Board Computer PCM-5896
Page 1: ...PCM 5896 All in One Super7 Single Board Computer with LCD Ethernet Audio 4 COMs ...
Page 12: ......
Page 19: ...Chapter 1 General Information 7 Board layout ...
Page 24: ...12 PCM 5896 User Manual Locating jumpers J11 J2 J3 J4 J6 J7 J8 J12 J10 J9 S3 J5 S1 ...
Page 92: ...80 PCM 5896 User Manual ...
Page 116: ...104 PCM 5896 User Manual ...
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Page 124: ...112 PCM 5896 User Manual ...
Page 125: ...Appendix C Optional Extras 113 C Optional Extras A P P E N D I X ...
Page 127: ...Appendix C Optional Extras 115 Optional USB Cable Optional USB Cable part no 1709080150 ...
Page 128: ...116 PCM 5896 User Manual ...