PB1176 has the same CPU core as the Pi. It, in all probability, does not have the same peripherals (DMA, SD/MMC, USB and Framebuffer). If it does, they are unlikely to work the same way.
Without Broadcom releasing a whole bunch of information that they are unlikely to release, or releasing a simulator themselves, you aren't gonna get a simulator that realistically reflects the Pi. Once the kernel source is released, you might be able to reverse engineer than and hack something together for qemu or skyeye.