68quad 1.1 (Mac)

Overview:

The basic goal of the 68quad project is to create an Open Source definition of a high performance Microprocessor Architecture. The 68k architecture created by Motorola was the most ambitious design of 1981. But the latest version was the 68060 (a superscalar pipelined 32 bit processor with up to 110MIPs) introduced about 1992. Then, Motorola apparently stopped development of this product line in favour of the IBM/Apple/Motorola PowerPC architecture. In the 80's, software in the Macintosh and UNIX enviroment was mainly available for the 68k architecture but since then most of these systems were ported to RISC architectures. Therefore, the 68k architecture is be the best candidate for revival in an Open Source project, as it is well known, general purpose but currently not continued. In the last years, other silicon vendors (Intel Merced, HP PA, MIPS, DEC alpha, ...) have extended their architecures to 64 bit to extend the directly (and therefore fast) addressable memory range and integer processing power especially for server applications. As the 68k floating point architecture already defines 64 bit (double) and 80 bit (extended) precision, the 68quad is targeted to have 64 bit and 80 bit integer operands as well to make the architecture more homogenous. Therefore, the goals of 68quad project are: define a 64 bit (or 80 bit) upwards compatible API for the 68k architecture extend the Mac06 (http://www.dsitri.de/projects/mac06/mac06.html) assembler and C compiler to create 68quad code write a simulator demonstrating the pipeline architecture provide enough information for independent silicon designers to create 68quad compatible chips port Linux/m68k to 68quad The project ist hosted by DSITRI at the 68quad Project Homepage

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