[A83] Re: number _vputs and black-out a piece of screen
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[A83] Re: number _vputs and black-out a piece of screen
ld a,($c008)
ld b,a
and 3
ld (contrast_sublev),a
ld a,b
srl a
srl a
add a,'0'
ld (contrast),a
;...
In a message dated 6/27/2001 5:42:25 PM Eastern Daylight Time,
tijlc@hotmail.com writes:
> Undoubtedly :-)
>
> So, updated again:
>
> ld b,00h
> ld a,(8008h)
> rra ; divide by 2
> rl b
> rra ; once again
> rl b
> and 0Fh ; not sure if this is necessary, but I think it is.
> add 30h ; 30h is the character '0'
> ld (contrast),a
> ld a,b
> xor 3
> ld (contrast_sublev),a
> ld hl,contrastTxt
> bcall(_vputs)
> ret
> contrastTxt:
> .db "Contrast is "
> contrast:
> .db 0," "
> contrast_sublev:
> .db 0,"/4",0
----
Jonah Cohen
<ComAsYuAre@aol.com>
http://jonah.ticalc.org