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Subject: Re: SWI / BASIC command to read number of Pixels in a screen mode
Newsgroups: comp.sys.acorn.programmer
Reply-To: Bryan Hogan <news@helpful.demon.co.uk>
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In message <11510590.202.1317160195012.JavaMail.geo-discussion-forums@ 
yqnk41>
          Michael <michaelremerton@gmail.com> wrote:

> suitable SWI to return the width of a MODE MODE'd Screen

Dragging out some very old code of mine:

SYS "OS_ReadModeVariable",-1,3 TO ,,ncolours%:ncolours%+=1
SYS "OS_ReadModeVariable",-1,4 TO ,,screenXfact%
SYS "OS_ReadModeVariable",-1,5 TO ,,screenYfact%
SYS "OS_ReadModeVariable",-1,11 TO ,,screenXpix%
SYS "OS_ReadModeVariable",-1,12 TO ,,screenYpix%
screenXmax%=screenXpix%<<screenXfact%
screenYmax%=screenYpix%<<screenYfact%

Bryan.
-- 
RISC OS London Show - Saturday 29th October 2011
http://www.riscoslondonshow.co.uk/