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zorchenhimer/vars-in-ops.asm

Last active June 26, 2019 19:06
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vars-in-ops.asm
;; cmp word [ball_x], WIDTH - BALL_WIDTH
ref_x: cmp word 30, WIDTH - BALL_WIDTH
;; the "+ 1" here is the size of the "cmp word" opcode
;; ball_x will point to the memory address of "30" above
%define ball_x (ref_x + 1)
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