Hardware

From DD-WRT Wiki

Contents 1 NVRAM 2 Boardflags 3 Overclocking 4 Hardware Modifications 硬件改造

[edit] NVRAM

NVRAM (non-volatile RAM) is the place where the permanent settings are stored. This includes

• DD-WRT settings that you normally change using Web Interface
• settings for user Startup Scripts

You can run the following commands using Command Line:

• Show the whole NVRAM content:

nvram show

• Show NVRAM content containing the pattern <search_pattern> (useful for quickly finding things in NVRAM):

nvram show | grep <search_pattern>

Replace <replace_pattern> with what you are actually looking for. This can simply be a word or a regular expression

• Show value of a certain variable:

nvram get <variable_name>

• Change variable value in RAM only:

nvram set <variable_name>="<value>"

Now you can play with the new settings or test user scripts but this new value will be lost after reboot unless you do nvram commit.

• Save all changed variables to NVRAM:

nvram commit

Reboot the router for new settings in NVRAM to go into effect.

[edit] Boardflags

/* boardflags */

1. define BFL_BTCOEXIST 0x0001 /* This board implements Bluetooth coexistence */
2. define BFL_PACTRL 0x0002 /* This board has gpio 9 controlling the PA */
3. define BFL_AIRLINEMODE 0x0004 /* This board implements gpio13 radio disable indication */
4. define BFL_ENETROBO 0x0010 /* This board has robo switch or core */
5. define BFL_CCKHIPWR 0x0040 /* Can do high-power CCK transmission */
6. define BFL_ENETADM 0x0080 /* This board has ADMtek switch */
7. define BFL_ENETVLAN 0x0100 /* This board has vlan capability */
8. define BFL_AFTERBURNER 0x0200 /* This board supports Afterburner mode */
9. define BFL_NOPCI 0x0400 /* This board leaves PCI floating */
10. define BFL_FEM 0x0800 /* This board supports the Front End Module */
11. define BFL_EXTLNA 0x1000 /* This board has an external LNA */
12. define BFL_HGPA 0x2000 /* This board has a high gain PA */
13. define BFL_BTCMOD 0x4000 /* This board' BTCOEXIST is in the alternate gpios */

[edit] Overclocking

BCM3303 v0.7 clock frequencies: (todo...)

MIPS/CPU

Backplane

Comment

BCM3303 v0.8 clock frequencies:

MIPS/CPU	Backplane	Comment
183	91
188	94
197	98
200	100
206	103
212	106
216	108
217	109
225	113
238	119
240	120
250	125

[edit] Hardware Modifications 硬件改造

Hardware Modifications (mods) are not necessarily DD-WRT specific or compatible.
硬件改造不需要特殊或兼容的DD-WRT'

Serial Port 串口
Additional external SMA-R connector 添加外置SMA-R连接器
Dual Serial Port 双串口
SD-Card 添加SD卡
Temperature sensor for WRT54G 2.x and WRT54GS with DS1820 往WRT54G 2.x 或 WRT54GS添加温度传感器DS1820
DIR-320 64 Mb RAM Upgrade