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JackAsser
Registered: Jun 2002
Posts: 1994 |
NMI delay
How much is an NMI delayed if triggered during IRQ-setup? |
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... 45 posts hidden. Click here to view all posts....
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Martin Piper
Registered: Nov 2007
Posts: 645 |
"approximately top fifth of the chip (with the regular rectangular pattern) is the **PLA** that decodes instructions."
https://www.righto.com/2013/01/a-small-part-of-6502-chip-explai..
Basically "paz" you're not considering the actual layout of the gates on the chip and instead applying your incorrect thinking from an incorrect understanding about some higher level context which isn't appropriate. |
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Martin Piper
Registered: Nov 2007
Posts: 645 |
This explains why your PLA explanation is wrong "paz".
https://en.wikipedia.org/wiki/Programmable_logic_array
"In 1970, Texas Instruments developed a *mask-programmable IC*..." "...TI coined the term **Programmable Logic Array** for this device." |
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chatGPZ
Registered: Dec 2001
Posts: 11147 |
If you'd spend as much time programming as googling up your "knowledge", perhaps your verlet integration code would even be ready by now :) |
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Fungus
Registered: Sep 2002
Posts: 629 |
Martin, if you have nothing to add to this conversation, then kindly shut up. No one wants to argue with you about tangential subjects just so you can die on yet another hill about something you clearly misunderstand.
Good lord man... |
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Martin Piper
Registered: Nov 2007
Posts: 645 |
Quote: If you'd spend as much time programming as googling up your "knowledge", perhaps your verlet integration code would even be ready by now :)
We can see when you're wrong when you go into irrelevant topics. |
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Martin Piper
Registered: Nov 2007
Posts: 645 |
Quote: Martin, if you have nothing to add to this conversation, then kindly shut up. No one wants to argue with you about tangential subjects just so you can die on yet another hill about something you clearly misunderstand.
Good lord man...
It's directly relevant since it details exactly how the instructions work.
Paz is just wrong and trying to go into tangents instead of sticking to the topic. |
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chatGPZ
Registered: Dec 2001
Posts: 11147 |
It has been an irrelevant topic since post #28, so yes.
Everyone here knows already how illegal opcodes work and that incomplete decoding is involved. Really. If you want to call it PLA doesn't matter a single bit to the topic. |
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Martin Piper
Registered: Nov 2007
Posts: 645 |
Quote: It has been an irrelevant topic since post #28, so yes.
Everyone here knows already how illegal opcodes work and that incomplete decoding is involved. Really. If you want to call it PLA doesn't matter a single bit to the topic.
It's not me calling it a PLA, it's all the technical sources demonstrating it's a PLA by the analysis of the gates on the chip. Meanwhile we have your lack of knowledge baseless claims.
The fact is "paz" you're just wrong on this topic as you are wrong on so many other topics.
It's relevant to the topic because it directly deals with how the instructions are decoded. It's why studying at things like visual 6502 are important. |
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Martin Piper
Registered: Nov 2007
Posts: 645 |
Quote: Martin, if you have nothing to add to this conversation, then kindly shut up. No one wants to argue with you about tangential subjects just so you can die on yet another hill about something you clearly misunderstand.
Good lord man...
oh and "No one wants to argue with you" if that were true then "paz" wouldn't be trying to reply to my posts right? But here we he, "paz" is spewing rubbish again and again. If you have a problem with irrelevant posts then talk to "paz". |
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chatGPZ
Registered: Dec 2001
Posts: 11147 |
Incomplete logic is not what defines a PLA. Removing "don't care" gates and logic from digital circuits is basically done everywhere, always (And the guys at MOS were really good at this, no doubt).
If you really want to pull the ancient TI terminology - even that doesn't apply. This refers to a standard component that can be customized by the customer. This is not the case for the 6502 either. The "custom chip" on the later AR5 hardware would be one for which this is the correct term, for example (iirc they coined yet another, different, term for this particular IC, because marketing reasons. Forgot what it was).
But what do i know. You are the expert.
(And yes, as soon as someone has to resort to calling names, you can be sure you have to take him serious. for real) |
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