Program UBoot

Hi tns1,

> Are there two bootloaders?

Sort-of ... the code in the epcs on-chip rom is built-in to the device

configation. At reset, this code searches for the end of the config

data in the epcs device, then loads the records that follow (which

in this case would be u-boot). It then jumps to the u-boot entry

point. The epcs u-boot command will tell you the size of the

configuration data.

> How do you figure out how much app code you can fit?

In my case, it's purely observation ... my fpga configuration data

is about 192 KB (compressed). I'm using an EPCS4 ... so that leaves

me plenty of room for u-boot (which ends up being roughly another

128 KB).

> Do you lose the ability to use compressed files when you program

> with the flash programmer?

I use compressed bit streams & haven't had any problems.

Regards,

--Scott