Hi, I am trying to use the QEMU based Raspberry Pi configuration at https://sourceforge.net/projects/rpiqemuwindows/ to simulate bare metal development on the Pi, but having some weird difficulties.
First of all, I tried assembling an ARM program and placing it on the provided disk image in the kernel.img file. However, the Pi emulator by default launches with the command line option "-kernel kernel-qemu" which seems to ignore this, as even when kernel.img was changed it booted Linux in the same way. So I tried putting my arm program's assembly file into the command line in the parameter to "-kernel", and QEMU started but nothing happened. So I used -S and the monitor to try to figure out what was happening. However on running, it appeared that the program was not loaded at $8000 (as the documentation claimed would normally be the case on the Pi) as there was no code there, and the starting PC (R15) was set to $0, where there was no code either. So when using an alternative "kernel" in this way, where is it actually loaded? Also, removing the "-kernel" option from the command line, which I hoped would cause it to use the kernel.img file from the virtual disk, instead caused QEMU to simply "fall out" with no error message or suggestion as to what had gone wrong. I did encounter this before as it happened when another process had the virtual disk open, but even after closing everything else, it still falls out without explanation. Is there any reason for this and is the lack of an error message a bug which could be fixed? Mark
