Best Resources: Main QEMU Usage Documentation Qemu Man Page – Invaluable resource when working with qemu. Quick Start Guide – Slightly ubuntu/debian specific. Covers KVM. Qemu Networking Guide – Great resource, super useful. Have fun qemu’s a great tool.
It’s the carry from bit 3 to bit 4, just like the normal carry flag records carry from bit 7. So, e.g. to get the half carry bit in an add: ((a&0xf) + (value&0xf))&0x10 Which gives 0x10 if half carry should be set, 0 otherwise. Getting half carry from the other relevant ops follows naturally … Read more
Virtual machines make use of CPU self-virtualization, to whatever extent it exists, to provide a virtualized interface to the real hardware. Emulators emulate hardware without relying on the CPU being able to run code directly and redirect some operations to a hypervisor controlling the virtual container. A specific x86 example might help: Bochs is an … Read more
(Using as an example your first link) You want to duplicate the behavior of an old HP calculator, there are two options: You write new program that draws the calculator’s display and keys, and when the user clicks on the keys, your programs does what the old calculator did. This is a Simulator You get … Read more
Emulation is a multi-faceted area. Here are the basic ideas and functional components. I’m going to break it into pieces and then fill in the details via edits. Many of the things I’m going to describe will require knowledge of the inner workings of processors — assembly knowledge is necessary. If I’m a bit too … Read more