http://beebwiki.mdfs.net/index.php?title=OSWORD_%262C&feed=atom&action=historyOSWORD &2C - Revision history2024-03-28T16:14:54ZRevision history for this page on the wikiMediaWiki 1.30.0-rc.0http://beebwiki.mdfs.net/index.php?title=OSWORD_%262C&diff=2655&oldid=prevJgharston: Created page with "Category:OSWORD &2C 44 Send VDU code direct to PRISMA Prisma On entry: XY?0 = VDU code XY?1.. = VDU sequence parameters This call provides a fast means ..."2015-10-25T19:53:40Z<p>Created page with "<a href="/Category:OSWORD" title="Category:OSWORD">Category:OSWORD</a> &2C 44 Send VDU code direct to PRISMA Prisma On entry: XY?0 = VDU code XY?1.. = VDU sequence parameters This call provides a fast means ..."</p>
<p><b>New page</b></p><div>[[Category:OSWORD]]<br />
&2C 44 Send VDU code direct to PRISMA Prisma<br />
On entry:<br />
XY?0 = VDU code<br />
XY?1.. = VDU sequence parameters<br />
<br />
This call provides a fast means of sending a whole VDU sequence<br />
directly to the PRISMA-3. It is recommended that, where possible,<br />
machine code programmers use this entry in preference to using<br />
OSWRCH.<br />
<br />
OSWORD &2C is always directed at the PRISMA-3 and only the<br />
PRISMA-3 regardless of the setting of *TEXT or *GRAPHICS.<br />
OSWORD &2C can be used without upsetting characters currently<br />
in the VDU queue.<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]]) 19:53, 25 October 2015 (UTC)</div>Jgharston