LPC1768 upgrade backup issue

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LPC1768 upgrade backup issue

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Contributor I
I want to design software using LPC1768 with a user bootloader and two user app witten at different flash address. Each time the bootloader will jump to the latest app address.
As the app backup function,when user apgrade app,the bootloader will save the app at the address of the oldest app,if upgrade successfully,bootloader will set the the newly upgraded app as the latest one.
The issue is that, my LPC1768 app is compiled by keil with a on-chip ROM address, and the app must save at the address, so the second app must save at the save address with the first app.
Can I compile two app save at different address and make user bootloader jump and run any one of them? How can I do that?
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