The default value of 20000 should be suitable for most platforms. Decreasing this value will increase keyboard responsiveness, at the expense of emulated CPU speed, and vice versa. The keyboard is polled every KEYBOARD_TIMER_UPDATE_DELAY instructions. To send a Page Up key, press Ctrl+F then Q.įor graphics (SDL) applications, all keys will work as per a 'real' PC without needing the special sequences above. To send a Page Down key, press Ctrl+F then O.To send Ctrl+F, press Ctrl+F then Ctrl+F. To send Ctrl+A, press Ctrl+F then Ctrl+A.For example, to get the F4 key, press Ctrl+F then 4. To send an F xx key, press Ctrl+F then a number key.To send an Alt+ xxx key combination, press Ctrl+A then the key, so for example to type Alt+F, press Ctrl+A then F.Windows 3.0) gives the option.įor console (text) applications, there are special key sequences to get Alt+ xxx, F xx and some Ctrl+ xxx keys, since these are not returned directly by the standard C I/O functions: If you are using an international keyboard layout everything will work fine with no changes, provided 'United States 83-key XT keyboard' or similar is selected if your OS (e.g. The scan code table in the BIOS maps your local keyboard layout onto scan codes matching a US-layout QWERTY keyboard. The OS (DOS/Windows) then converts them back to ASCII characters and normally this process works seamlessly. shift) as necessary to work like a 'real' keyboard. Because a real 8042 returns scan codes rather than the ASCII characters, for portability, the emulator BIOS does the reverse of a real PC BIOS and converts ASCII characters to scancodes, simulating press/release of the modifier keys (e.g. The emulator simulates an XT-style keyboard controlled by an Intel 8042 chip on I/O port 0圆0, generating interrupt 9 on each keypress. While 8086tiny as supplied implements only the 8086 instruction set, it can be extended to more complex, modern instruction sets with relative ease. The emulator uses the SDL graphics library for portability, and compiles under a range of platforms (Windows, Mac OS X, Linux, Android, iOS, Raspberry Pi). Keyboard controller with 83-key XT-style keyboard.Accurate programmable interrupt timer (PIT).CGA/Hercules graphics card with 720x348 2-color and 320x200 4-color graphics (64KB video RAM), and CGA 80 x 25 16-color text mode support.Fixed disk controller (supports a single hard drive up to 528MB).8086tiny emulates a 'late 80's era' PC XT-type machine with the following features: 8086tiny is a tiny, free, open source, portable Intel PC emulator/VM, powerful enough to run DOS, Windows 3.0, Excel, MS Flight Simulator, AutoCAD, Lotus 1-2-3, and similar applications.

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