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t/data/zx48.asm  view on Meta::CPAN

;   Note. the jump to DRW-STEPS is just to decrement B and jump into the 
;   middle of the arc-drawing loop. The arc count which includes the first 
;   vertical arc draws one less than the perceived number of arcs. 
;   The final arc offsets are obtained by subtracting the final COORDS value
;   from the initial sx and sy values which are kept at the base of the
;   calculator stack throughout the arc loop. 
;   This ensures that the final line finishes exactly at the starting pixel 
;   removing the possibility of any inaccuracy.
;   Since the initial sx and sy values are not required until the final arc
;   is drawn, they are not shown until then.
;   As the calculator stack is quite busy, only the active parts are shown in 
;   each section.


; ------------------
; THE 'DRAW' COMMAND
; ------------------
;   The Spectrum's DRAW command is overloaded and can take two parameters sets.
;
;   With two parameters, it simply draws an approximation to a straight line
;   at offset x,y using the LINE-DRAW routine.

t/data/zx48_base.asm  view on Meta::CPAN

;   Note. the jump to DRW-STEPS is just to decrement B and jump into the 
;   middle of the arc-drawing loop. The arc count which includes the first 
;   vertical arc draws one less than the perceived number of arcs. 
;   The final arc offsets are obtained by subtracting the final COORDS value
;   from the initial sx and sy values which are kept at the base of the
;   calculator stack throughout the arc loop. 
;   This ensures that the final line finishes exactly at the starting pixel 
;   removing the possibility of any inaccuracy.
;   Since the initial sx and sy values are not required until the final arc
;   is drawn, they are not shown until then.
;   As the calculator stack is quite busy, only the active parts are shown in 
;   each section.


; ------------------
; THE 'DRAW' COMMAND
; ------------------
;   The Spectrum's DRAW command is overloaded and can take two parameters sets.
;
;   With two parameters, it simply draws an approximation to a straight line
;   at offset x,y using the LINE-DRAW routine.

t/data/zx48_benchmark.asm  view on Meta::CPAN

;   Note. the jump to DRW-STEPS is just to decrement B and jump into the 
;   middle of the arc-drawing loop. The arc count which includes the first 
;   vertical arc draws one less than the perceived number of arcs. 
;   The final arc offsets are obtained by subtracting the final COORDS value
;   from the initial sx and sy values which are kept at the base of the
;   calculator stack throughout the arc loop. 
;   This ensures that the final line finishes exactly at the starting pixel 
;   removing the possibility of any inaccuracy.
;   Since the initial sx and sy values are not required until the final arc
;   is drawn, they are not shown until then.
;   As the calculator stack is quite busy, only the active parts are shown in 
;   each section.


; ------------------
; THE 'DRAW' COMMAND
; ------------------
;   The Spectrum's DRAW command is overloaded and can take two parameters sets.
;
;   With two parameters, it simply draws an approximation to a straight line
;   at offset x,y using the LINE-DRAW routine.