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AM79C976 Datasheet(PDF) 198 Page - Advanced Micro Devices |
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AM79C976 Datasheet(HTML) 198 Page - Advanced Micro Devices |
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198 / 309 page  198 Am79C976 8/01/00 P R E L I M INARY %&5 0DVWHU 0RGH 5HDG$FWLYH Bit Name Description 31-16 RES Reserved locations. Written as zeros and read as undefined. 15-0 MSRDA Reserved locations. After H_RESET, the value in this regis- ter will be 0005h. The setting of this register has no effect on any Am79C976 controller function. It is only included for software com- patibility with other PCnet family devices. Read always. MSRDA is read only. Write operations have no ef- fect. %&5 0DVWHU 0RGH :ULWH $FWLYH Bit Name Description 31-16 RES Reserved locations. Written as zeros and read as undefined. 15-0 MSWRA Reserved locations. After H_RESET, the value in this regis- ter will be 0005h. The setting of this register has no effect on any Am79C976 controller function. It is only included for software com- patibility with other PCnet family devices. Read always. MSWRA is read only. Write operations have no ef- fect. 25 SRAMSIZ 0000h SRAM Size Yes Yes 26 SRAMB 0000h SRAM Boundary Yes Yes 27 Reserved N/A Reserved No No 28 EBADDRL N/A Expansion Bus Address Lower Yes No 29 EBADDRU N/A Expansion Bus Address Upper Yes No 30 EBDR N/A Expansion Bus Data Port Yes No 31 STVAL FFFFh Software Timer Value Yes No 32 MIICAS 0400h MII Control and Status Yes Yes 33 MIIADDR N/A MII Address Yes Yes 34 MIIMDR N/A MII Management Data Yes No 35 PCIVID 1022h PCI Vendor ID No Yes 36 PMC_A C802h PCI Power Management Capabilities (PMC) Alias Register No Yes 37 DATA0 0000h PCI DATA Register Zero Alias Register No Yes 38 DATA1 0000h PCI DATA Register One Alias Register No Yes RAP Mnemonic Default Name Programmability User EEPROM 39 DATA2 0000h PCI DATA Register Two Alias Register No Yes 40 DATA3 0000h PCI DATA Register Three Alias Register No Yes 41 DATA4 0000h PCI DATA Register Four Alias Register No Yes 42 DATA5 0000h PCI DATA Register Five Alias Register No Yes 43 DATA6 0000h PCI DATA Register Six Alias Register No Yes 44 DATA7 0000h PCI DATA Register Seven Alias Register No Yes 45 PMR1 N/A Pattern Matching Register 1 Yes No 46 PMR2 N/A Pattern Matching Register 2 Yes No 47 PMR3 N/A Pattern Matching Register 3 Yes No |
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