Re: Fw: A83: Re: scroll text (for Linus)
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Re: Fw: A83: Re: scroll text (for Linus)
thanks
On 16-Jul-98, James Matthews wrote:
>Olle's post was this:
>----------
>> From: Olle Hedman <oh@hem.passagen.se>
>> To: assembly-83@lists.ticalc.org
>> Subject: Re: A83: Re: scroll text
>> Date: Tuesday, July 14, 1998 11:33 PM
>>
>>
>> At 09:17 1998-07-14 -0500, you wrote:
>> >
>> >i made a new version of the routine below...
>> >
>> >-Harper Maddox
>> >
>> >jerky@ebicom.net
>> >IRC nick: Geori
>> >ICQ: 1214597
>> >
>> >-----Original Message-----
>> >From: Chris Hiszpanski <mecad@scv.net>
>> >To: assembly digest <assembly-83-digest@lists.ticalc.org>
>> >Date: Monday, July 13, 1998 10:43 PM
>> >Subject: A83: scroll text
>> >
>> >
>> >>
>> >>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
>>
>> The problem is probably that _vputs is fuckin a-reg up...
>> try pushing af before the call and popping it after...
>>
>> and to you other.. he _is_ using the B for the djnz.. the ld a,96 sets
>> the start-col in his progg.. the ld b,70 is the load for djnz.. he
>> doesn't want a delay the first time...
>>
>> and the cp 0 or or a instructions are pointless.. the dec-instructions
>> sets the zeroflag if you reach 0.. so you dont need to cp 0 or or a or
>> something...
>>
>> //Olle
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