Why can't I find an IVT at location 0x400 of the demo SD card supplied with Tower Vybrid module

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Why can't I find an IVT at location 0x400 of the demo SD card supplied with Tower Vybrid module

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alanball
Contributor III

Trying to work out why an SD card built from scratch won't boot

Looking at the demo card (which boots fine) there is no recognisable IVT at 0x400 (this area is all 0)

Anyone know why?

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alanball
Contributor III

OK - my fault

I was mounting the SD card as a disk in the hex editor - I guess this was causing it (or the USB driver ?) to hide anything not in a partition

Dumping the SD card to a file using dd and looking at that reveals the expected IVT

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alanball
Contributor III

OK - my fault

I was mounting the SD card as a disk in the hex editor - I guess this was causing it (or the USB driver ?) to hide anything not in a partition

Dumping the SD card to a file using dd and looking at that reveals the expected IVT

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