Hi André, "André Fachat" schrieb: > > In case you haven't noticed, some brilliant guys have analyzed the > 6502. >From microscopic images of the chip they built a netlist and a > simulator to actually run the chip, from this netlist! > > http://www.visual6502.org/ wow, thanks for the info. _This_ is great stuff. And my previous boss at the university, visiting each and every SIGGRAPH, did _not_ inform me about this! > This allows to actually analyze all the peculiarities, for example > why an interrupt during a taken branch is delayed by an instruction. > http://forum.6502.org/viewtopic.php?t=1634 - might be worth looking > into that for the Commodore emulators... And the true nature of _all_ the illegal opcodes can be figured easily as Michael Steil already did for some here: http://www.pagetable.com/?p=39 > I voted for the 6522 as next chip to analyze, to find out about the > shift register bug. But if you're willing to donate some 6526, they > might open this one and we finally find out how the timers work.... There are some 20000x20000 shots from the 8726 REU-DMA chip lying around at my harddisk.... But I thought to save them until I retired ;-) Womo -- ------ to obtain more infos about me, look up the page ------ ------ http://www.wmsr.de | wm (at) wmsr (dot) de ------ Message was sent through the cbm-hackers mailing listReceived on 2010-09-16 10:00:03
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