Colin - just checking - did you get my subscription renual? --- Colin Piggot <[EMAIL PROTECTED]> wrote:
> I am now pleased to announce that on the 8th June > the prototype of the > Mayhem Accelerator was finally completed. > > With work on the accelerator starting in January > 2004, then first unveiled > as a work in progress with an initial (and dodgy!) > 12MHz speed at the ORSAM > show in November 2004. There's been plenty of > hiccups along the way, > including the latest just a couple of weeks ago when > I somehow killed the > prototype, so for quickness I built up another one > from scratch and carried > on where I had left off as I really wanted to get > the hardware finished! > > What does the Mayhem Accelerator offer? Speed! It's > what the Sam Coupé has > been crying out for and the Mayhem Accelerator > speeds up the Sam to 10MHz, > 16MHz and 20MHz speeds, with uncontended memory > reading for a further boost. > The final design also offers a 6MHz 'legacy' speed > as well, to run at stock > speed without having to unplug the interface. > > Using 'BogoMIPS' (by Frode Tennebo) and 'Fractal > Explorer' (by Dr Andy > Wright and Simon N. Goodwin) as two test programs to > give some benchmarks of > the final design here are the results: > > Fractal Explorer (generating the default Mandlebrot > image) > > Normal Sam: 21.30 seconds > Mayhem @ 10MHz: 10.56 seconds (202% speedup) > Mayhem @ 16MHz: 7.20 seconds (296% speedup) > Mayhem @ 20MHz: 6.06 seconds (352% speedup) > > BogoMIPS > > Normal Sam: 0.360 BogoMIPS > Mayhem @ 10MHz: 0.748 BogoMIPS (208% speedup) > Mayhem @ 16MHz: 1.208 BogoMIPS (336% speedup) > Mayhem @ 20MHz: 1.513 BogoMIPS (420% speedup) > > The final stage now is to complete the designs for > the PCB for the > production version and build one up to go through > testing, then the > Accelerator will be ready. All going well it will be > available in 8 weeks > time at the start of August. > > More information will be in the forthcoming issue of > Sam Revival covering > the last month of development as well as the pricing > of the Mayhem > Acclerator and preordering information. (SR issue > 15 - out later this > month, see www.samcoupe.com to preorder this issue > or to subscribe to the > magazine) > > For previous news and updates please see: > > ORSAM 2004 Show report - Sam Revival issue 11 > Creating Mayhem article - Sam Revival issue 12 > Quazar News - Sam Revival issue 14 > www.samcoupe.com website - for news and videos of > the > Mayhem Accelerator in > action. > > All the best, > > Colin > ===== > Quazar : Hardware, Software, Spares and Repairs for > the Sam Coupe > April 1995-2006 - Celebrating 11 Years of developing > for the Sam Coupe > Website: http://www.samcoupe.com/ > > >
