8051 and 6805 Verilog source code available for free download PLANO, Texas, November 9, 2003 -- QuickCores is pleased to announce that it has posted developmental versions of its Q8051 and Q6805 microcontroller CPU soft cores at its web site for free downloading and may be used without restriction. The Q8051 and Q6805 CPU soft cores should easily synthesize when targeted to Actel ProASIC-PLUS, Xilinx Spartan or QuickLogic Eclipse II FPGAs when using Synplify Lite, or to ALTERA Cyclone when using Quartus II web edition software. The Q8051 CPU is provided in original Verilog RTL source format and features QuickCores real-time monitor architecture. The .zip files contain all the modules necessary for developers to start creating their very own 8051 microcontroller designs in an FPGA, including example top-level designs, simple test fixtures and example C programs for creating stimulus .v files. Also included is a recently enhanced JTAG debug module with 144-channel real-time trace buffer. The 144-channel real-time trace buffer traces, in parallel, a 36-bit time stamp along with the CPU’s Accumulator, B register, Data Pointer, Program Counter, Program Status Word, Stack Pointer, Instruction Register and internal read and write data address and data buses. The trace buffer comprises extra logic which automatically aligns program fetch cycles with decode cycles which helps to eliminate the confusion associated with displaying and interpreting the instruction pipeline in the debugger’s trace window.
Once a breakpoint is encountered, the trace buffer contents are scanned out via the debug module’s JTAG pins. When combined with the QuickCores JTAG-accessible, real-time monitor architecture, the 144-channel trace buffer offers an enhanced visibility into the CPU core during real-time monitoring and debugging operations.
The Q8051 CPU is compatible with both Keil Software C51 C compiler and uVision2 integrated development environment as well as Domain Technologies BoxView real-time debugger software. The Q6805 CPU is compatible with ByteCraft Ltd., Metrowerks, and Cosmic Software 6805 C compilers and Domain Technologies BoxView real-time debugger. Both the Q8051 and Q6805 CPU designs are micro-code free.
QuickCores develops and licenses synthesizable microcontroller IP for embedding in FPGA and ASIC devices. Since its inception in 1996, QuickCores has been focused on adapting the models of popular microcontrollers to include on-chip, real-time monitoring and debug capability. All of QuickCores microcontroller IP is built on a patented real-time monitor and data exchange architecture that enables high speed exchange and monitoring of data between target and host using a JTAG interface. For more information about QuickCores and its products, visit
www.quickcores.com .
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