Subject: RE: [stella] programming teaser From: "Dennis Debro" <dennis@xxxxxxxxxxxxxxx> Date: Fri, 20 May 2005 06:02:33 -0400 |
Hi Andrew, > As promised, here is a programming teaser. Explain how the following code > could ever exit? > ldy #10 ; draw scanlines in groups of 21 > (ie: > 1 character row) > > anotherLine > ; draw a scanline here (code omitted) > > sta WSYNC > > dey > bne anotherLine > bmi Continue Am I missing something here? When y equaled 0 wouldn't the routine fall through and not bmi? Take care, Dennis Archives (includes files) at http://www.biglist.com/lists/stella/archives/ Unsub & more at http://stella.biglist.com
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