82375EB Datasheet, PDF (52/131 Pages) Intel Corporation – PCI-EISA BRIDGE (PCEB)

82375EB SB
NOTE
Shaded areas represent main memory decode regions for MEMCS
Figure 3 MEMCS Decode Areas
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Table 2 summarizes the attribute registers used in MEMCS decoding The MCSCON MAR1 MAR2 and
MAR3 Registers are used to assign RE WE attributes to a particular memory range The MEMCS hole is
programmed using the MCSTOH and MCSBOH Registers The region above 1 MByte is programmed using
the MCSTOM Register The region from 0–512 KByte is enabled disabled using bit 4 of the MCSCON Regis-
ter MCSCON bit 4 is also used to enable and disable the entire MEMCS function
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