Re: A85: Drawing a menu

To: assembly-85@lists.ticalc.org
Subject: Re: A85: Drawing a menu
From: mgp4007@omega.uta.edu (Michael Pearce)
Date: Tue, 05 May 1998 20:13:47 GMT
Delivered-To: assembly-85-outgoing@towerguard.unix.edu.sollentuna.se
In-Reply-To: <19980505.155226.8710.0.egillespie@juno.com>
References: <19980505.105848.4727.0.justin-b@juno.com> <19980505.155226.8710.0.egillespie@juno.com>
Reply-To: assembly-85@lists.ticalc.org


this can be done quite easily.
 ...
 ld a,$FF
 ld bc,1024 - 1
 ld hl,$FC00
 call CopyByte
 ...

;hl points to starting mem addr.
;a has character
;bc has # of bytes-1 to store
CopyByte:
 ld d,h
 ld e,l
 inc de
 ld (hl),a
 ldir
 ret

-mike pearce

On Tue, 5 May 1998 15:21:03 -0400, you wrote:

>
>This brought up a question I am wondering.  Is there a way to set an
>entire range of memory to a specific value?  I think there is an
>assembler opcode that does this for the 8086.  It's very fast for
>clearing the screen to a certain color.  For the calc it might be useful
>if you want to have a black background.
>
>egillespie@juno.com
>erik_gillespie_1096@gwgate.kvcc.edu
>
>"In a prototypical world, nothing ever goes wrong." -Scott Meyers
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References:

A85: Drawing a menu

From: justin-b@juno.com (Justin M Bosch)

Re: A85: Drawing a menu

From: egillespie@juno.com (Erik L Gillespie)