The SuperCPU 64 and SuperCPU 128 are accelerator cartridges for the Commodore 64 and 128 computers. These cartridges provide advanced features and an enhanced operating speed of 20 MHz -- up to 22 times faster than the stock Commodore 64. For additional information on these exciting products, see the links provided on this page.

SuperCPU Information

General Information 

General Specifications 

Compatibility 

GEOS Operation 

Programming Information 

Version 2/SuperCPU 128 Technical Information 

SuperCPU RAM Expansion and Timing Info in Adobe Acrobat format (210K) 

Commodore World Issue 12 

The Super Processor, by Jim Brain. Provides an overview of the W65C816S microprocessor, with attention to differences between the 6502 emulation mode and the 6502 core used in the MOS 6510. 

A Sneak Preview of the SuperCPU, by Mark Fellows and Doug Cotton. A preliminary look at the SuperCPU 64. Not extremely technical, but a decent early overview of the device. 

 

Commodore World Issue 16 

A 6502 Programmer's Introduction to the 65816, by Brett Tabke. A very good introductory article on the new capabilities that the 65816 provides. Includes programming models (register overviews) of both the Native and Emulation modes, plus a handy listing of the complete 655816 instruction set.

Bookware In Review: The Software Manual (Programming the 65816), by Jim Brain. A review of The Western Design Center's official guide to programming the 65816. Quick review of the review: The book is expensive, but worth it. If you're serious about programming the SuperCPU, and can afford it, don't hesitate to get it.

 

Commodore World Issue 17 

SUPER CPU: CMD's New Time Machine, by Gaelyne R. Gasson. A user's overview with information about how the SuperCPU performs with a wide variety of specific application types. Non-technical, but a very good reference for prospective buyers. 

All About SuperGEOS, by Maurice Randall. Provides an overview of using the SuperCPU with GEOS, along with a little background on the creation of the SuperGEOS patches. (Non-technical). 

Assembly Line: Improve SuperCPU Efficiency the Native Way, by Doug Cotton. Programming examples that show how the use of the 65816's Native mode can improve performance through more efficient code. Includes sample routines for switching modes, 16-bit loops, 16-bit addition, 16-bit subtraction and 16-bit multiplication. 

 

Commodore World Issue 18 

816 Beat: The Great Divide, by Doug Cotton. Provides a source-code level comparison of 16-bit division routines written in 6502 and 65816 assembly language. 

 

Commodore World Issue 19 

816 Beat: CMD SuperCPU RAM Expansion & Timing, by Doug Cotton. Covers the full details of the SuperRAM card, memory mapping, and timing aspects for all functions. This article provides details on cycle timings of various types of operations with the SuperCPU, and also shows how expansion memory is mapped, detected and allocated by programmers. (currently available here only  in Adobe Acrobat format). 

 

Commodore World Issue 20 

816 Beat: SuperCPU Interrupts, by Mark Fellows. Covers how the SuperCPU maps and uses the 65816's interrupt vectors in both Emulation and Native modes, and provides sample routines for creating your own SuperCPU interrupt routines. 

 

Commodore World Issue 21 

816 Beat: Using the MVN and MVP Instructions, by Mark Fellows. A guide to using the 65816's Block Move instructions, complete with sample source code. 

The Unofficial CMD Homepage

Colin's Commodore/SuperCPU page

The Official WiNGs Website