因为要装中文字体和Tomtom，就想把pagepool稍微调大一点（从前用WM6.1的时候是调成了32MB）。结果发现这个ROM的pagepool设置不对。随package跟的pagepool changer也不能正确设置pagepool，它误报20MB的pagepool，实际上是24MB。正如我所料这个坊间广泛流传的pagepool changer可能从WM6.1以来就没有work过。
现在简单总结一下正确的设置方法，记录下来做个备忘录。基本方法参见 http://forum.ppcgeeks.com/showthread.php?t=43110 这个帖子是WM6.1的，到了WM 6.5要稍微变一下。经过实验，结果如下：
1. 解开压缩包的RUU_signed.nbh文件，用hex editor搜索如下字段。其实搜索a0开始10个byte应该就可以了。
18 16 a0 03 06 16 a0 13 00 10 83 e5 8b bb ff eb
前两位是pagepool的大小，18 16是24MB。 以下摘抄自ppcgeeks tsab的帖子：
03 15 - Sprint Diamond WM 6.1 stock rom (1.09) default; 12MB dynamic (When viewed under Settings -> System -> Memory, you should have around 203.84MB of Total Program memory available.)
02 15 - 8MB dynamic
01 15 - 4MB dynamic
18 16 - 24MB static (should give you around 191.84MB Total Program memory)
10 16 - 16MB static (should give you around 199.84MB Total Program memory)
[PAGEPOOL EXPLANATIONS AND CALCULATIONS]
"XX 15" pagepools are dynamic based (first byte value multiplied by 4 to determine pagepool size)
"XX 16" pagepools are static based (first byte value multiplied by 1 to determine pagepool size)
03 15 = 0x03 * 0x400000=0xC00000=decimal 12582912 bytes = 12 MB dynamic pagepool
02 15 = 0x02 * 0x400000=0x800000=decimal 8388608 bytes = 8 MB dynamic pagepool
18 15 = 0x18 * 0x400000=0x6000000=decimal 100663296 bytes = 96 MB dynamic pagepool
18 16 = 0x18 * 0x100000=0x1800000=decimal 25165824 bytes = 24 MB static pagepool
10 16 = 0x10 * 0x100000=0x1000000=decimal 16777216 bytes = 16 MB static pagepool
20 16 = 0X20 * 0x100000=0x2000000=decimal 33554432 bytes = 32 MB static pagepool
02 15 - 8MB dynamic
01 15 - 4MB dynamic
18 16 - 24MB static (should give you around 191.84MB Total Program memory)
10 16 - 16MB static (should give you around 199.84MB Total Program memory)
[PAGEPOOL EXPLANATIONS AND CALCULATIONS]
"XX 15" pagepools are dynamic based (first byte value multiplied by 4 to determine pagepool size)
"XX 16" pagepools are static based (first byte value multiplied by 1 to determine pagepool size)
03 15 = 0x03 * 0x400000=0xC00000=decimal 12582912 bytes = 12 MB dynamic pagepool
02 15 = 0x02 * 0x400000=0x800000=decimal 8388608 bytes = 8 MB dynamic pagepool
18 15 = 0x18 * 0x400000=0x6000000=decimal 100663296 bytes = 96 MB dynamic pagepool
18 16 = 0x18 * 0x100000=0x1800000=decimal 25165824 bytes = 24 MB static pagepool
10 16 = 0x10 * 0x100000=0x1000000=decimal 16777216 bytes = 16 MB static pagepool
20 16 = 0X20 * 0x100000=0x2000000=decimal 33554432 bytes = 32 MB static pagepool
2. 用hex editor把上述字段改成
20 16 a0 03 06 16 a0 13 00 10 83 e5 8b bb ff eb
3. 存盘重新刷ROM。开机剩余内存从104.75MB降低到97MB，少了大约8MB，正好是原来24MB pagepool到新32MB pagepool的差值。修改完毕，收工。
顺便说一句，Juicy, OMJ这些刷机cook ROM鼎鼎有名的人始终都整不明白pagepool怎么设，ROM cooker和他们cook的ROM质量实在让人担心。多数人估计就是浪费时间抓一堆dll凑来凑去。。。
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