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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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82375EB датащи(PDF) 37 Page - Intel Corporation |
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82375EB датащи(HTML) 37 Page - Intel Corporation |
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37 / 131 page  82375EBSB 3113 MCSTOHMEMCS TOP OF HOLE REGISTER Address Offset 46h Default value 0Fh Attribute ReadWrite Size 8 bits This register defines the top of the MEMCS hole MEMCS is not generated for accesses to addresses within the hole defined by this register and the MCSBOH Register The hole is defined by the following equation TOH t address t BOH TOH is the top of the MEMCS hole defined by this register and BOH is the bottom of the MEMCS hole defined by the MCSBOH Register For example to program the TOH at 1 MByte a 64 KByte this register should be programmed to 10h To program the TOH at 2 MByte a 128 KByte this register should be programmed to 21h To program the TOH at 12 MByte this register should be programmed to BFh When the TOH k BOH the hole is disabled If TOHeBOH the hole size is 64 KBytes It is the responsibility of the programmer to guarantee that the TOH is above 1 MByte AD 3124 must be 0’s for the hole meaning the hole is restricted to be under the 16 MByte boundary The default value for the BOH and TOH disables the hole Bit Description 70 Top of MEMCS Hole Bits 70 correspond to address lines AD 2316 respectively 3114 MCSTOMMEMCS TOP OF MEMORY REGISTER Address Offset 47h Default value 00h Attribute ReadWrite Size 8 bits This register determines MEMCS top of memory boundary The top of memory boundary ranges from 2 MBytes-1 to 512 MBytes-1 in 2 MByte increments This register is typically set to the top of main memory Accesses t 1 MByte and s top of memory boundary results in the assertion of the MEMCS signal (unless the address resides in the hole programmed via the MCSBOH and MCSTOH Registers) A value of 00h sets top of memory at 2 MBytes-1 (including the 2 MByte-1 address) A value of FFh sets the top of memory at 512 MByte-1 (including the 512 MByte-1 address) Bit Description 70 Top of MEMCS Memory Boundary Bits 70 correspond to address lines AD 2821 respectively 37 |
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