----- Original Message ----- From: <email@example.com> > For a while I've been assessing the feasibility of using a PC as a > sort-of-SuperCPU, getting PC software to run an emulation of the CPU and a > cable /adaptor to control the write back and I/O read functions necessary. > With modern PCs some pretty amazing CPU emulation speeds are possible, but > its all brought back to reality by the need to write to the real hardware. > Hello, Nick- I checked out the 64HDD page and it does contain a lot of neat stuff and interesting information. I checked out your 'V6510' project and it looks good and looks well thought out. Apparently, you seem to be familar with the SuperCPU and how accelleration should operate asynchronously for CBM computers, how host memory should be mirrored, how i/o registers should be handled, etc. However, a 'fast' 6510 via the V6510 is just a 6510 in its stark essence. I would favor using a 65816 core engine. There should be C language models of the 65816 available and modern computers sport speeds enough to provide an accellerated 65816 flavor. I mean, all of this speed gained by the V6510 will still be bottled up by the 64Kb memory limit. I'm aware of the REU and c128's memory banking schemes. But such memory is *indirectly* addressed and limits the 6510/8502 core accordingly. The 65816 allows me to program and run geoZIP (http://www.cs.tut.fi/~albert/Dev/gunzip-geos/), the WAVE, my Silicon Dreams program (animation player), cool 65816 specific demos, etc. Speed alone is very nice and I think you've struck reasonable compromises in designing the hardware and software in providing a low cost solution for Commodore based accelleration. But at the same time, I feel it should be useful as well, by allowing the ability to emulate the extra opcodes, the increased stack space, relocatable zero page space and sporting *directly* addressable 16Mb of RAM. The 65816 emulation core will fit the bill very nicely. That said, I probably would not use it. I do own a SuperCPU, after all. :) But for many Commodore owners, a low cost accelleration solution would be very beneficial to those people. Moreover, having a 65816 engine readily available at a low cost resulting in a wider reach within the Commodore audience will spur more software development which can only benefit the real McCoy, the SuperCPU, as it is kinda lacking in 65816-specific software. Enjoy. -Todd Elliott Message was sent through the cbm-hackers mailing list
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