[BBC-Micro] Scrolling scrolling scrolling...

Richard Gellman splodge at starfleet.homeunix.net
Wed Dec 6 22:32:38 GMT 2006


Steve Fewell wrote:
> --- Ian Wolstenholme <BBCMailingList at beebmaster.co.uk>
> wrote:
>
>   
>> An alternative to my earlier solution, which should
>> work on
>> a BBC B although I have only tried it on the Master,
>> is to
>> define a single-character text window at (39,31):
>>
>> 10 MODE 1
>> 20 VDU 28,39,31,39,31
>> 30 PRINT"*";
>> 40 VDU 26
>>
>>     
>
> Another alternative is to use graphics cursor mode
> (VDU 5):
>   
Unfortunately Dom did say without using VDU 5 :)

I'm sure I saw somewhere as OSBYTE/*FX call that set scroll/no-scroll, 
but having gone thru the AUG thrice, I cannae find it cap'n.

There is a sneaky way to do it in MODE 7, but its not ideal and probably 
won't work if you've already scrolled the screen:

?&7FE7 = <character>

I believe the Acorn parlance for such a trick is "illegal programming" :)

-- Richard



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