🚀 go-pugleaf

mhardy@acorn wrote:
> 2105995@hydra.maths.unsw.EDU.AU writes:
>>>shunger@waikato.ac.nz wrote:
>>>: what was the *fx call or sys call to drag sprites around the desktop???.
>>>Me too could someone post it???
>>>Alfred Tascon at ernie@tartarus.uwa.edu.au
>>*fx 162,28,3
>
>Well, I've posted before explaining that this is not a good way to do it,
>since you are also altering the state of seven other bits which control
>other aspects of FileSwitch and the Wimp. A better way is to read the byte,
>set bit 1, and then write it back. This is the program that I use:
[..proglet deleted..]

Didn't you receive the program I sent you? Or wasn't it worth acknowledging?
>You *must* use the OS_Byte calls, otherwise the checksum byte will become
>incorrect. This byte is calculated on a power-on reset, and then maintained
>by the OS_Byte calls (in other words, they don't recalculate it, but merely
>update it in a manner that is appropriate to the changes made).

Yeah *I* know. Please not here that the original request was for 'the *fx
call or sys call' - I gave the FX call.

[..lots of helpful hints on Risc OS 3.1 upgrades..]
This is assuming we can GET Risc OS 3.1 (quiet grumble)

>Hope this helps. I'd say this is one for the FAQ list too, otherwise there
>will be loads of people blowing away the seven other bits of that
>configuration byte with the incorrect (but commonly recommended) method...

Well, I wasn't going to pressure Philip here, but I also said that it was
possibly a candidate...

>- Michael J Hardy
>  Technical Publications    Email:      mhardy@acorn.co.uk




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