Design Guide

Reserved, NC, and Test Signals
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280 Intel
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855GM/855GME Chipset Platform Design Guide
15.3. Intel 855GM/GME Chipset GMCH RSVD Signals
The Intel 855GM/GME chipset GMCH has a total of 13 RSVD and 12 NC signals that are Intel reserved
in the pin-map. The recommendation is to provide test points for all RSVD signals for possible future
use. All NC signals should be left as no connects. The location of the Intel reserved signals in the
GMCH pin-map is listed in Table 117.
Table 117. Intel 855GM/GME Chipset GMCH RSVD and NC Signal Pin-Map Locations
Signal Name Ball Name
AJ29 NC
AH29 NC
B29 NC
A29 NC
AJ28 NC
A28 NC
AA9 NC
AJ4 NC
AJ2 NC
A2 NC
AH1 NC
B1 NC
D7 RSVD
F12 RSVD
D12 RSVD
B12 RSVD
AA5 RSVD
L4 RSVD
F3 RSVD
D3 RSVD
B3 RSVD
F2 RSVD
D2 RSVD
C2 RSVD
B2 RSVD