more work on reducing residual similarity with C64 KERNAL

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Paul Gardner-Stephen committed 2019-04-24 15:31:36 +09:30
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Most likely LDA $0288 / STA $D2 - Set upper half of screen RAM address
$0288 is publicly documented as the location where screen RAM lives.
$D1/$D2 is the current pointer to screen memory. This is the simplest
way to set this. Also, copying one memory location to another is not
copyrightable.