doc:appunti:hardware:technicolor_tg789vac_v2
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doc:appunti:hardware:technicolor_tg789vac_v2 [2020/03/18 16:08] – [Router Bircked] niccolo | doc:appunti:hardware:technicolor_tg789vac_v2 [2020/03/18 17:03] – [Router Bircked] niccolo | ||
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Someone says that this Technicolor router has **two memory banks** to store (flash) the firmware. | Someone says that this Technicolor router has **two memory banks** to store (flash) the firmware. | ||
- | * In normal condition, the router boot from bank1. | + | * In normal condition, the router boot from bank_1. |
- | * Flashing via TFTP will write to bank1. | + | * Flashing via **TFTP** will write to **bank_1** only. It will do so even if the active bank is currently bank_2. It will never set bank_1 as active. |
- | * If something goes bad during the kernel | + | * You can see what is the **active bank** by reading **/ |
- | * FIXME Is there a software command to switch from bank1 to bank2? | + | * If something goes bad during the kernel |
+ | * FIXME Is there a software command to switch from bank_1 | ||
So I immagine at least two methods to force the router to boot from the other bank: | So I immagine at least two methods to force the router to boot from the other bank: | ||
- Load a bad image via TFTP flashing (e.g. by disconnecting the cable during the upload, or powering the router off during the flash. I did not tried it. | - Load a bad image via TFTP flashing (e.g. by disconnecting the cable during the upload, or powering the router off during the flash. I did not tried it. | ||
- | - Force some **memory read errors** during bootstrap. This can be accomplished by connecting the **RE#** line (pin 8) of the TSOP chip to ground for some short times during bootstrap. This was reported to work by some users. | + | - Force some **memory read errors** during bootstrap. This can be accomplished by connecting the **RE#** line (pin 8) of the TSOP chip to ground for some short times during bootstrap. This was **[[https:// |
+ | |||
+ | {{tg789vac_v2_tsop-pinout.jpg? | ||
===== Credits and Web References ===== | ===== Credits and Web References ===== | ||
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* **[[https:// | * **[[https:// | ||
* **[[https:// | * **[[https:// | ||
+ | * **[[https:// | ||
* **[[https:// | * **[[https:// | ||
+ | * **[[https:// |
doc/appunti/hardware/technicolor_tg789vac_v2.txt · Last modified: 2020/03/23 18:52 by niccolo