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Sphereso
PostPosted: Mon Oct 14, 2019 2:16 pm 
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Joined: Mon Oct 14, 2019 2:01 pm
Posts: 1
I know that the state can be set to T0 by the #TWOCYCLE.phi1 signal (signal names from visual6502) but that is just in the case of a two cycle instruction.
Also someone said that setting the state to T0 is handled by the pla in the case of instructions with more cycles but I just can't find out which pla outputs handle this.

I would love if someone could tell me the pla outputs.
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BigEd
PostPosted: Tue Oct 15, 2019 7:58 pm 
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Joined: Thu Dec 11, 2008 1:28 pm
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Location: England
Welcome, Sphereso. You might like to read some of the visual6502 wiki, for example
http://visual6502.org/wiki/index.php?ti ... Decode_ROM

About T0: in a sense, there is not a T0 state. There are a number of state bits, and one of them we call T0, but they are not exclusive. In a typical simulation you'll see combinations of the 'tcstate' bits which we describe in the 'State' column as T0 and as T0+T2. See for example
http://www.visual6502.org/JSSim/expert. ... loglevel=3
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