| This file describes the virtual device of qemu for supporting this test suite. | |
| Services supplied by the testdev device: | |
| serial output: write only, on io port 0xf1 | |
| exit process: write only, on io port 0xf4, value used as exit code | |
| ram size: read-only, on io port 0xd1, 4 bytes' size | |
| irq line setting: write only, on io ports 0x2000 - 0x2018, value to set/clear | |
| simple io: read/write, on io port 0xe0, 1/2/4 bytes | |
| Test device used a char device for actual output | |