Справочник Пользователя для AMD LX 900@1.5W
AMD Geode™ LX Processors Data Book
203
CPU Core Register Descriptions
33234H
5.5.2.117 FPU x87 Control Word MSR (FPU_CW_MSR)
5.5.2.118 FPU x87 Status Word MSR (FPU_SW_MSR)
5.5.2.119 FPU x87 Tag Word MSR (FPU_TW_MSR)
MSR Address
00001A10h
Type
R/W
Reset Value
00000000_00000040h
FPU_CW_MSR Register Map
63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32
RSVD
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
RSVD
FPU_CW
FPU_CW_MSR Bit Descriptions
Bit
Name
Description
63:12
RSVD
Reserved. Write as read.
11:0
FPU_CW
FPU Control Word.
MSR Address
00001A11h
Type
R/W
Reset Value
00000000_00000000h
FPU_SW_MSR Register Map
63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32
RSVD
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
RSVD
FPU_SW
FPU_SW_MSR Bit Descriptions
Bit
Name
Description
63:16
RSVD
Reserved. Write as read.
15:0
FPU_SW
FPU Status Word.
MSR Address
00001A12h
Type
R/W
Reset Value
00000000_00000000h
FPU_TW_MSR Register Map
63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32
RSVD
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
RSVD
FPU_TW