
1-22
AlphaServer DS20
Service Manual
1.8.3
System Board Switchpacks
There are two switchpacks on the system board. They control the writing of the
flash ROM and the speed of the crossbar switch among other things.
Figure 1-12 Switchpack Location
CPU 0
CPU 1
D
Chip
D
Chip
P
Chip
P
Chip
PK1410-99
SW2
SW2
SW3
SW3
System Board
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
Off On
Off On
fsb
coa
cob
mdb
sp0
sp1
sp2
pby
cn7
cn2
cn3
cn4
cn5
cn6
spr
flash_wr
Содержание AlphaServer DS20
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Страница 122: ...4 32 AlphaServer DS20 Service Manual 4 16 CD ROM Removal and Replacement Figure 4 15 Removing CD ROM PKW0519 97...
Страница 124: ...4 34 AlphaServer DS20 Service Manual 4 17 Floppy Removal and Replacement Figure 4 16 Removing Floppy 1 PK1401 98...
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