In article <19970902190744949.AAA282@xxxxxxxxxxxxxxxxxxxxx>, you wrote:
>O.K. a plain English example it is then:
>
>You have two ways of changing the horizontal position of a player.
>
> 1) Coarse positioning. Wait the appropriate number of cycles
> after the WSYNC on a scanline and then write to RESP0. The reason
> this positioning is referred to as coarse is that since there are 3
> color cycles per machine cycle, it would be impossible to place the
> player at the exact pixel you want. A common way to do the coarse
> positioning is:
>
> ; Routine to position player horizontally
> ; On entry X=player (0/1)
> ; Y=Coarse position
>
> STA WSYNC ;3 Wait for horizontal sync
> resloop
> DEY ;2
> BPL resloop ;2
> STA RESP0,X ;4
> sta WSYNC ;3
> RTS ;6
>
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Thanks Bob! This makes more sense.
You know... I would pay good money for a Stella Programming Guide that
was written in plain english and had source code examples like this.
CRACKERS
(I hate tech manuals from hell!!!!!)
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