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Altera_Forum
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21 years ago

EPCS boot loader start location

Hello, I'm upgrading a Cyclone EP1C6 based Nios 1 to Nios 2 system. In the Nios 1 system I use USB and a PC app to load C code .srec files via ASMI into the serial eeprom used to house the PLD...
Altera_Forum's avatar
Altera_Forum
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21 years ago

Hello Kschuh,

Thanks very much for the long reply.

Yes, I found the bootloader files, and also the format of the boot record as you illustrate. So I did actually change the bootloader, and I've got it loading the C code from a particular location (20000H in my case).

I confirm a typo - it was 2 x M4K ram blocks, and not 2k of ram.

It's good to hear that you've made an even smaller one - just 1 M4K block. Very good!

Yes, I had thought about writing another loader to replace epcs_controller_boot_rom.hex, especially as I found that, as you confirm, both ASMI and initialized RAMs are still supported. Ideally I want a loader to know how to talk over my USB link, as my old one did, so I may go back to it yet. http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/rolleyes.gif

In the meantime, thanks for your suggestions.

Bart