Re: Z180 vs Z380 (was Re: ACE 002 and ADVRAM...? New MSX?)

[Daniel Jorge Caetano]

On Fri, 21 Apr 2000 03:07:17 +0200, Patriek Lesparre wrote:

>>  Sorry, I did not understood your proposal. There is no instruction
>>to switch back to Legacy Mode. The only possible solution is
>>reset the entire processor. And, on MSX architeture, this
>>means a generic MSX reboot. Go to Enhanced Mode is easy and AFAIK
>>the Z380 even continue with the same PC and other registers (there
>>is no reset).
>Come on, it should be REALLY easy hardware- and software-wise to implement
>a circuit that will reset just the Z380 in order to switch to legacy mode.
>It's a non-issue.

 It's not a hardware matter. It's a software also. What to do with the
registers...? If the Program Counter is above 64Kb, where will you put
it? If the SP is above the 64Kb, where you'll put it?


     AbraçOS/2, Daniel Caetano ([EMAIL PROTECTED])

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