cs5535 National Semiconductor Corporation, cs5535 Datasheet - Page 320

• Manufacturer Part Number: cs5535
• Description: Geode Cs5535 Companion Multi-function South Bridge
• Manufacturer: National Semiconductor Corporation

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5.7
The registers for the Floppy Port are divided into two sets:
• Standard GeodeLink Device MSRs (Shared with DIVIL,
• Floppy Port Specific MSRs
The MSRs are accessed via the RDMSR and WRMSR pro-
cessor instructions. The MSR address is derived from the
perspective of the CPU Core. See Section 3.2 "CS5535
MSR Address
see Section 5.6.1 "Standard GeodeLink Device MSRs"
on page 299.)
51400030h
51400031h
51400032h
51400033h
FLOPPY PORT REGISTER DESCRIPTIONS
Type
RO
RO
RO
RO
Register Name
Floppy Port 377h Shadow (FLPY_377_SHDW)
Floppy Port 3F2h Shadow (FLPY_3F2_SHDW)
Floppy Port 3F7h Shadow (FLPY_3F7_SHDW)
Floppy Port 372h Shadow (FLPY_3F2_SHDW)
Table 5-19. Floppy Port Specific MSRs Summary
320
MSR Addressing" on page 53 for more details on MSR
addressing.
All MSRs are 64 bits, however, the Floppy Port Specific
MSRs are called out as 8 bits. The Floppy Port treats writes
to the upper 56 bits (i.e., bits [63:8]) of the 8-bit MSRs as
don’t cares and always returns 0 on these bits. Table 5-19
summarizes the Floppy Port Specific MSRs.
The reference column in the tables point to the page where
the register maps and bit descriptions are listed.
Reset Value
xxh
xxh
xxh
xxh
Reference
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