Re: A82: ld hl,$FC00+13+(16*7) ---??what??

To: assembly-82@lists.ticalc.org
Subject: Re: A82: ld hl,$FC00+13+(16*7) ---??what??
From: ilya winham <ilyamojo@geocities.com>
Date: Mon, 13 Oct 1997 21:19:25 -0600
References: <19971013223256.19087.qmail@hotmail.com>
Reply-To: assembly-82@lists.ticalc.org

Patrick Davidson wrote:
> 
> >What are the screen coordinates of |  ld hl,$FC00+13+(16*7)  |
> >At least I think that is what it is used for. It is from an 86
> >assembly program, used for displaying a small pic.
> 
> Row 7, column 104
> 
> The TI-86 screen is a 16 bytes wide bitmap, so the Y coordinate
> given by the upper 6 bits of the address (7 in this case), and
> the X coordinate is 8 times the value of the lower 4 bits (13).
> 

So, for the 82, how would I get it to be Row 7, column 78?

References:

Re: A82: ld hl,$FC00+13+(16*7) ---??what??

From: "Patrick Davidson" <eeulplek@hotmail.com>

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