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collapseos/emul/8086/README.md
2020-10-25 10:27:52 -04:00

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# 8086 emulator
This folder contains emulator for 8086 binaries of Collapse OS. The bulk of
it is a fork of Fake86 by Mike Chambers.
`forth` is an imaginary hardware used for userspace development and testing.
This machine has an imaginary interrupt API and does not conform to PC/AT.
`pcat` is a very simple PC/AT emulator. The BIOS interrupt hooks implemented in
it only cover Collapse OS' own needs.
## Requirements
You need `ncurses` to build the `forth` executable. In debian-based distros,
it's `libncurses5-dev`.
## Build
Run `make` and it builds the `forth` and `pcat` interpreters.
## Usage
The `./forth` executable here works like the one in `/cvm`, except that it runs
under an emulated 8086 machine instead of running natively. Refer to
`/cvm/README.md` for details.
`pcat` needs to be suppied a path to a floppy disk image with a proper MBR.
`disk.bin` provided by the `pcat` recipe is sufficient.