Subject: Re: [stella] "Illegal" opcodes From: Russ Perry Jr <slapdash@xxxxxxxxxxxx> Date: Sun, 18 Jun 2000 23:55:20 -0500 |
At 12:19 AM -0400 6/19/00, Erik Mooney wrote: >>I've always wondered why they didn't just tie off any used opcodes as >>NOPs to actually MAKE them unuseable. >As I said, because tying them off as NOPs would increase complexity and >cost for an actual _reduction_ in chip functionality, which is rather a >bad idea on the engineering level. True, you said that; sorry I didn't recall that while responding. That does make some sense. BUT! >I'd still maintain that the chip designers knew exactly that those >operations would result from those opcodes and intentionally left it >that way. Then why not document them? I imagine they may have planned to announce new opcodes in the next release? :-) -- //*================================================================++ || Russ Perry Jr 2175 S Tonne Dr #105 Arlington Hts IL 60005 || || 847-952-9729 slapdash@xxxxxxxxxxxx VIDEOGAME COLLECTOR! || ++================================================================*// -- Archives (includes files) at http://www.biglist.com/lists/stella/archives/ Unsub & more at http://www.biglist.com/lists/stella/
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