CompuServe Messages

This is the wrong place to reply for this I Think: 1. My story on TAS is: TAS holds AS low, the only thing that changes is the status of the R/W pin. For some reason, it is easier to not account for this.. Ah.. heres the Sidekick note I wrote: so its fragmented… At 12:50 an hour ya want war and peace? I got this part off somebody at DELPHI whose name I can't remember, which is a darn shame as he's really bright… TAS, as well as CAS and CAS2 on the 68020, drops the Address Select line for the duration of the RMW (read-modifywrite) cycle. Only the state of the R/W pin changes. I'm not really sure on these details but: The Amiga's ram doesn't accept only the R/W pin change as a valid bus request. AS HAS to be strobed. TAS is harmless on the amiga, however: the read is performed, but the memory never sees the write! Not quite what you wanted! Use BITSET instead. As it precludes even the possibility of multiple-processoring the current amiga, and probably creates some of the DMA problems, I'm a tad upset. (I think everyone will have multiple processor systems in 5 years or so) 'Course on the ST and Mac these instructions utterly crash the machine last I looked… Go ahead, plug a 68010, even, into a mac… Stand BACK! there ya go! Mike.