Kyle22 Posted February 19, 2016 Share Posted February 19, 2016 Exactly. So if you know how to detect it, why not take advantage of the expanded set of legal instructions? That would make everyone happy. Also, the use of double and triple NOPs for cycle timing only means (to me anyway) that the programmer is taking extra steps to obfuscate his code and make it more difficult to repair it for use on other CPUs. I can see someone using SAX for example to save a byte and a few cycles in a critical area if there is no other way, but those who use as many illegals as humanly possible should be horsewhipped (IMHO). Quote Link to comment Share on other sites More sharing options...
phaeron Posted February 20, 2016 Share Posted February 20, 2016 65C02/65C816 compatible version of Robocop3Theme.xex attached, along with source for in-place patch that was appended to executable. robofix.zip 2 Quote Link to comment Share on other sites More sharing options...
Heaven/TQA Posted February 20, 2016 Share Posted February 20, 2016 Well.... Case is of you had no 65816 installed you would not care? Right? And me using undocumented opcodes fex (they are not illegal as they run on our 6502c from 1978 up to late 80s on the XEGS) really don't care.... 2 Quote Link to comment Share on other sites More sharing options...
Heaven/TQA Posted February 20, 2016 Share Posted February 20, 2016 And LAX and SAX are too cool opcodes not to use 2 Quote Link to comment Share on other sites More sharing options...
Heaven/TQA Posted February 20, 2016 Share Posted February 20, 2016 Btw... Atari never released officially a 65816 or 6502c card or expansion so I would that call as hobby custom hardware... As drac030 even needed to patch the OS? Quote Link to comment Share on other sites More sharing options...
emkay Posted February 20, 2016 Share Posted February 20, 2016 Btw... Atari never released officially a 65816 or 6502c card or expansion so I would that call as hobby custom hardware... As drac030 even needed to patch the OS?No problem to me, if people want to create a 16 Bit Atari with a VBXE and some additional OPL 2(3) and/or Digitizer chip. This would point to the missing part inbetween the 8 bits and the Amiga. But this is no Atari 800 . People could name it " Atari 800 VBXE" , making things more clear. Quote Link to comment Share on other sites More sharing options...
Kyle22 Posted February 20, 2016 Share Posted February 20, 2016 (edited) Btw... Atari never released officially a 65816 or 6502c card or expansion so I would that call as hobby custom hardware... As drac030 even needed to patch the OS? You only need to patch the OS if you want to run in 16 bit mode. Everything works fine with a normal OS, including the new opcodes that replace the illegal ones. Remember, the CPU starts up in 8 bit mode and stays there until it's told to switch to 16 bit mode. Edit: spelling. Edited February 20, 2016 by Kyle22 Quote Link to comment Share on other sites More sharing options...
Kyle22 Posted February 20, 2016 Share Posted February 20, 2016 Are there enough CPU cycles left to play PoKey and GTIA together for a stereo effect? Quote Link to comment Share on other sites More sharing options...
Kyle22 Posted February 20, 2016 Share Posted February 20, 2016 65C02/65C816 compatible version of Robocop3Theme.xex attached, along with source for in-place patch that was appended to executable. It sounds great! Thanks again. BTW, this runs using normal OS, or 816 OS. Quote Link to comment Share on other sites More sharing options...
_The Doctor__ Posted March 16, 2016 Share Posted March 16, 2016 Phaeron for the win!! nice job! 1 Quote Link to comment Share on other sites More sharing options...
EnderDude Posted February 28, 2019 Share Posted February 28, 2019 I would love to hear the Agent X II theme on the GTIA beeper, where the Pokey makes the percussion sounds! )))))) Quote Link to comment Share on other sites More sharing options...
Kyle22 Posted February 28, 2019 Share Posted February 28, 2019 I'm sure it can be done, just please stay away from anything illegal so we may ALL be able to enjoy it. Quote Link to comment Share on other sites More sharing options...
xxl Posted February 28, 2019 Author Share Posted February 28, 2019 6502c is the official processor in 8bit atari... 65816 is an unofficial modification so if you have problems with atari software on your moded hardware, run them on the atari emulator. 3 Quote Link to comment Share on other sites More sharing options...
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