D-4 SPARCengine Ultra AX
i
OEM Technical Manual • May 1999
D.3 Flash Memory and NVRAM Layout
The Ultra AXi PROM space is arranged as blocks containing headered segments. The
key organizational component is the header. The information content of the PROM
and its headers are shown in
FIGURE D-2.
FIGURE D-2 Ultra AXi CPU PROM Content Layout
POST
Space for optional
drop-ins
Unused
Compressed OBP
Keyboard
Header 0x20 bytes
0x1ff.f000.0000
Reset Vector
Plug-ins
0x1ff.f00.A000
0x1ff.f00f.fff
Fonts
Fonts
ATI graphics driver 2
ATI graphics driver 1
OBDIAG
320K
180K
250K
250K
1 MB
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