AppleWin/linux.md

Linux

• Structure
• What works
• Executables
  • applen
  • qapple
  • sa2
  • libretro
• Build
  • Checkout
  • Fedora
  • Raspbian
• Speed
  • Fedora
  • Raspbian

Structure

There are 4 projects

• libapple: the core emulator files
• applen: a frontend based on ncurses
• qapple: Qt frontend
• sa2: SDL2 frontend
• libra2: a libretro core

The libapple interface is a link time interface: some functions are not defined and must be provided in order to properly link the application. These functions are listed in interface.h.

The main goal is to reuse the AppleWin source files without changes: only where really necessary the AppleWin source files have been modified, mostly for

• header files issues
• const char *
• exclude some Windows heavy blocks (source/MouseInterface.cpp)

What works

Some key files have been completely reimplemented or discarded:

• AppleWin.cpp
• WinFrame.cpp
• WinVideo.cpp

Some features totally ignored:

• ethernet
• serial port
• debugger
• speech (currently it hangs the emulator)

The rest is in a very usable state.

Executables

applen

Frontend based on ncurses, with a ASCII art graphic mode.

Keyboard shortcuts

• F2: reset the machine
• F3: terminate the emulator
• F11, F12: Save, Load Snapshot
• ALT-RIGHT: wider hi res graphis
• ALT-LEFT: narrower hi res graphics
• ALT-UP: vertical hi res (smaller)
• ALT-DOWN: vertical hires (bigger)

In order to properly appreciate the wider hi res graphics, open a big terminal window and choose a small font size. Try CTRL- as well if ALT- does not work: terminals do not report a consistent keycode for these combinations.

The joystick uses evdev (currently the device name is hardcoded).

qapple

This is based on Qt, currently tested with 5.10

• keyboard shortcuts are listed in the menu entries
• graphics: runs the native NTSC code
• joystick: it uses QtGamepad
• emulator runs in the main UI thread
• Qt timers are very coarse: the emulator needs to dynamically adapt the cycles to execute
• the app runs at 60FPS with correction for uneven timer deltas.
• full speed when disk spins execute up to 5 ms real wall clock of emulator code (then returns to Qt)
• (standard) audio is supported and there are a few configuration options to tune the latency (default very conservative 200ms)
• plain mockingboard is supported as well (not speech, which hangs the emulator)
• Open Apple and Solid Apple can be emulated using AltGr and Menu (unfortunately, Alt does not work well)

sa2

See sa2.

ra2

There is an initial libretro core.

A retropad can be plugged in port 1 (with or without analog stick).

Keyboard emulation

• JOYPAD_R: equivalent to F9 to cycle video types
• JOYPAD_L: equivalent to CTRL-SHIFT-F6 to cycle 50% scan lines
• START: equivalent to F2 to reset the machine

In order to have a better experience with the keyboard, one should probably enable Game Focus Mode (normally Scroll-Lock) to disable hotkeys.

Video works, but the vertical flip is done in software.

Audio (speaker) works with some glitches.

Must be manually configured: cmake -DLIBRETRO_PATH=/path/to/libretro-common

Easiest way to run from the build folder: retroarch -L source/frontends/libretro/libra2.so ../Disks/NoSlotClockTest.dsk

Build

The project can be built using cmake from the top level directory.

qapple can be managed from Qt Creator as well and the 2 have coexisted so far, but YMMV.

Checkout

git clone https://github.com/audetto/AppleWin.git --recursive
cd AppleWin
mkdir build
cd build
cmake ..
make

Use cmake -DCMAKE_BUILD_TYPE=RELEASE to get a release build.

Fedora

On Fedora 31, from a fresh installation, install all packages from fedora.list.txt.

Raspbian

On Raspbian 10, from a fresh installation, install all packages from raspbian.list.txt.

See Travis CI too.

Speed

Fedora

Intel(R) Core(TM) i5-4460 CPU @ 3.20GHz

Full update = 582 MHz

Video Stype	Video update
RGB Monitor	39
NTSC Monitor	27
Color TV	25
B&W TV	27
Amber Monitor	31

Raspbian

Pi 3B+

Full update = 54 MHz

Video Stype	Video update
RGB Monitor	5.3
NTSC Monitor	3.6
Color TV	2.6
B&W TV	2.9
Amber Monitor	4.5