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PostPosted: Sat Jul 14, 2018 7:40 pm 
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Here's an idea, inspired as a mutation of an idea of Dr Jefyll's: what old threads would you like to share, here on 6502.org?

Only two rules:
- Can't have a thread you created yourself
- Can't have a thread started this year, or a sticky thread

Also, please present your finds as linkified thread titles like so:
If you comment here, you have to include at least one fine old thread link!


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PostPosted: Tue Jul 24, 2018 12:33 pm 
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Here's another one:
(Things were quite lively for a while in the world of 6502 cores and FPGAs, but seem to have gone a bit quiet.)

Any more fine threads from anyone?


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PostPosted: Fri Jul 27, 2018 4:26 pm 
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Here's a few I enjoyed:


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PostPosted: Fri Jul 27, 2018 4:32 pm 
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Nice choices Rich - thanks!

Here's my obligatory additional submission:


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PostPosted: Sat Jul 28, 2018 10:58 pm 
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There are much more but to throw them in:


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PostPosted: Sun Aug 05, 2018 6:01 pm 
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Nice finds, GaBuZoMeu, thanks for stepping up to the challenge!

Obligatory threads... here's a couple recently mentioned by Garth and Jeff, respectively:


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PostPosted: Sun Aug 05, 2018 8:27 pm 
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GaBuZoMeu wrote:
[list]BRK detection (2002, schidester)
schidester wrote:
My findings show that BRK is absolutely, completely useless except in the one special case where the ONLY cause for interrupt can be from it (i.e., no interrupt driven I/O). I'll explain shortly...I'd love to be proved wrong on this or shown a way to do it, but my suggestion to anyone wishing to benefit from my experience is to stay the heck away from BRK!!!

I always get a laugh when someone declares a particular 6502 feature to be useless, as I've found a number of uses for BRK, as well as its close cousin in the 65C816: COP.

Apparently, Mr. Schidester has not engaged in the debugging of a program that was executed with the G ("go") command of a typical 65xx machine language monitor. If he had, he would have found BRK to be a convenient means of temporarily halting program execution to examine the registers, dump memory, etc. In fact, I have a macro called (what else) BREAK that I use to put break points into programs in areas where I suspect I might run into bugs.

Declaring a 6502 feature useless reminds me of the periodic debates on the value of the 6502's decimal mode (I use it for binary-decimal conversion) or (<zp>,X) addressing (my 28L92 driver makes extensive use of that addressing mode to select which channel is being processed).

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PostPosted: Sun Aug 05, 2018 8:36 pm 
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Thanks for taking part BDD - but where's your mini-challenge entry? You seem to have mistakenly taken exception to some small part of an interesting old thread here.

Oops, almost forgot the obligatory fine thread from the archives:


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PostPosted: Sun Aug 05, 2018 9:26 pm 
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BigEd wrote:
Thanks for taking part BDD - but where's your mini-challenge entry? You seem to have mistakenly taken exception to some small part of an interesting old thread here.

Oops, almost forgot the obligatory fine thread from the archives:

How about some back-and-forth about assembler syntax (Mats, Jan 2004)?

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PostPosted: Mon Aug 06, 2018 7:00 am 
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Thanks BDD!

Obligatory:


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PostPosted: Sun Aug 19, 2018 4:58 pm 
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Any more responses to the mini-challenge? Here are two more threads for your retroreading pleasure:



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PostPosted: Fri Sep 28, 2018 9:50 am 
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This one is exceptional I think:

    Getting young people into 6502


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PostPosted: Sun Sep 30, 2018 12:48 pm 
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Good find GaBuZoMeu! I enjoyed reading that 2013 thread.

Obligatory thread... let's see... how about



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PostPosted: Thu Oct 18, 2018 12:06 am 
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UM* (multiplication) bug in common 6502 Forths. Includes good animation of several multiplication algorithms by Dr Jefyll.

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PostPosted: Fri Jan 11, 2019 8:51 pm 
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A fine one that presumably never will finish:


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