Quark ядросы және MorphOS жүйесінде 68k қолданбаларын орындау

In computing, Quark is an operating system kernel used in MorphOS. It is a microkernel designed to run fully virtualized computers, called boxes (see sandbox). as of 2020, only one box is available, the ABox, that lets users run extant AmigaOS software compiled for Motorola 68000 series (MC680x0 or 68k) and PowerPC central processing units (CPUs).

Trance JIT is a MorphOS just in time (JIT) compiler, or code translator, for running 68k applications within the MorphOS environment. It has been part of the MorphOS operating system since MorphOS 1.4. MorphOS has a fully integrated 68k emulator to run many Amiga applications, which were almost exclusively compiled for the 68k processor, though MorphOS runs on PowerPC. Trance supplements this function by adding JIT compiling, increasing the speed of the emulation. It does not interfere with the full integration of 68k and PowerPC tasks MorphOS provides. Trance was developed by Ralph Schmidt and Teemu Suikki, with minor support from other MorphOS team members, Mark Olsen, Sigbjørn Skjæret, and Harry Sintonen.

Under the Quark kernel, a PowerPC native reimplementation of the OS known from the Commodore International A1000, A500(+), A600, A2000, A1200, A3000(T), and A4000(T) systems runs as a mix of a virtual emulation and a driver. This OS driver is called an ABox. The 68k emulation is written in C and uses GNU Compiler Collection (GCC) assembly language macros where needed to speed up some complex instructions. A JIT engine named Trance is also available for MorphOS, to speed up old 68k programs beyond the current state of the traditional emulation. The PPC native Exec supports the PowerPC register model which means there is no difference for this Exec if it runs 68k or PowerPC code. PowerPC code does not block multitasking inside the OS box like in emulations where the 68k code is just emulated in some host system's task (then every access outside this environment would stop the multitasking in the emulated environment). For applications running under this new PowerPC ABox kernel 68k code runs as subroutines inside PowerPC tasks. For 68k or PowerPC applications it's fully transparent if some library, hook, interrupt is still 68k or already using PowerPC code.