stevepoole wrote: ↑Thu Oct 19, 2023 8:07 pm
Hi Derek,
The program defaults to channel 1, (or perhaps to 0 for KEYROW or PAUSEs ?). SuperBasic handles these, as does TURBO.
If necessary, I could declare a CONsole device channel, and add hashes# to all relevant keywords. No problem.
But under QDOS, CURSOR must be channel one, offset from Main screen at 0,0, so I will investigate to see if I can set a channel number?
That is necessary for backwards system compatibility, a requirement for multi-system use !
When I get the results, or if anyone can answer beforehand, I will report back.
Regards, Steve.
CURSOR with 5 parameters only works on Minerva and SBASIC if I remember correctly - Simon Goodwin's bugs lists does discuss the issue and how to work around it, though it does require a fudge whereby you swap default channel IDs or something like that. Not looked to check, I think QDOS before launch was meant to have an USE command to set default window channel number, though it got dropped. I think Simon implemented something similar.
In addition to Derek's request, I'd like it to work on high resolution screens, necessitating adding something like
wide% = 512 : high% = 256
v$ = VER$
IF v$ = 'HBA' THEN wide% = SCR_XLIM : high% = SCR_YLIM
SCALE high%-1,0,0
If you need to work out the number of horizontal points to detect the number of graphics co-ordinates to work out where the right of the screen is likely to be, use something like:
vertical_scale = high%
hor_scale = wide%/(1.35*high%/vscl)
that would cope with cases where the vertical scale is not equivalent to the number of pixels.
Nice work on this Steve, getting better with each version.
