http://beebwiki.mdfs.net/index.php?title=OSWORD_%262E&feed=atom&action=historyOSWORD &2E - Revision history2024-03-28T10:53:20ZRevision history for this page on the wikiMediaWiki 1.30.0-rc.0http://beebwiki.mdfs.net/index.php?title=OSWORD_%262E&diff=2657&oldid=prevJgharston: Created page with "Category:OSWORD &2E 46 Read PRISMA base screen visible origin Prisma On exit: XY+0..1=X coordinate XY+2..3=Y coordinate The coordinates are returned with r..."2015-10-25T19:54:50Z<p>Created page with "<a href="/Category:OSWORD" title="Category:OSWORD">Category:OSWORD</a> &2E 46 Read PRISMA base screen visible origin Prisma On exit: XY+0..1=X coordinate XY+2..3=Y coordinate The coordinates are returned with r..."</p>
<p><b>New page</b></p><div>[[Category:OSWORD]]<br />
&2E 46 Read PRISMA base screen visible origin Prisma<br />
On exit:<br />
XY+0..1=X coordinate<br />
XY+2..3=Y coordinate<br />
<br />
The coordinates are returned with respect to the current graphics<br />
origin. The coordinate returned is the bottom left hand corner<br />
of the BASE screen when the LOWER screen is disabled. When<br />
enabled, the LOWER screen will cover this point.<br />
<br />
The BASE screen co-ordinate in the bottom left hand corner of the<br />
visible screen will vary with the current zoom factor and with<br />
panning and tilting commands. The OSWORD &2E call can be used to<br />
return this co-ordinate.<br />
<br />
==PRISMA calls==<br />
* [[OSWORD &28]] Read PRISMA information table<br />
* [[OSWORD &29]] Read PRISMA pixel value<br />
* [[OSWORD &2A]] Read PRISMA logical screen size<br />
* [[OSWORD &2B]] Read PRISMA colour palette<br />
* [[OSWORD &2C]] Send VDU sequence direct to PRISMA<br />
* [[OSWORD &2D]] Read last two PRISMA graphics cursors<br />
* [[OSWORD &2E]] Read PRISMA base screen visible origin<br />
* [[OSWORD &2F]] Read PRISMA graphics origin<br />
* [[OSWORD &30]] Read PRISMA interrupt status<br />
* [[OSWORD &31]] Direct call to PRISMA command<br />
* [[OSWORD &32]] Read position of PRISMA-3 roller screen<br />
* [[OSWORD &33]] Read/Write PRISMA overlay or nonvolatile memory<br />
<br />
==See Also==<br />
* http://mdfs.net/Docs/Comp/BBC/Oswords<br />
[[User:Jgharston|Jgharston]] ([[User talk:Jgharston|talk]]) 19:54, 25 October 2015 (UTC)</div>Jgharston