Re: A83: Re: scroll text
[Prev][Next][Index][Thread]
Re: A83: Re: scroll text
Hey hey hey... why are you all correcting his use of a instead of b? He says
he gets a blank screen, and that's probably NOT because of that. The real bug
is that _vputs trashes a.
Linus
On 14-Jul-98, James Matthews wrote:
>No wait...
>wtf...what's that "ld a,96" for? To use DJNZ you need the B register.
>For example:
>ld b,96
>DELAY:
> halt
> djnz DELAY
>That would call HALT 96 times.
>James.
>____________________
>James Matthews.
>E-mail (family): matthews@tkb.att.ne.jp
>E-mail (private): james_matthews@hotmail.com
>Homepage: http://home.att.ne.jp/gold/tomcat21/index.html
>ICQ: 7413754
>____________________________________
>----------
>> From: Chris Hiszpanski <mecad@scv.net>
>> To: assembly digest <assembly-83-digest@lists.ticalc.org>
>> Subject: A83: scroll text
>> Date: Tuesday, July 14, 1998 12:48 PM
>>
>>
>> I tried this routine I partialy made but all I get is a blank screen. No
>> text appears. What am I doing wrong?
>>
>> ld a,96
>>
>> DELAY:
>> halt
>> djnz DELAY
>>
>> DISP:
>> ld hl,53
>> ld (penrow),hl
>> ld (pencol),a
>> ld hl,ONIT
>> call _vputs
>> dec a
>> cp 0
>> jr z,FIN
>> ld b,70
>> jr DELAY
>>
>> ONIT:
>> .db "**Under Development**",0
Follow-Ups:
References: