OSWORD &5F

From BeebWiki

Revision as of 14:37, 8 March 2015 by WikiSysop (talk | contribs) (update)

(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)

Jump to: navigation, search

OSWORD &5F (95) - Read/write I/O memory across Tube (BBC Soft/ISMEC Monitor)

   On entry:
       XY?0  =command: 0=read, 1=write
       XY!1  =I/O memory address, b16-b31 ignored
       XY?5  =byte to write when writing
       XY?6  =ROM number or 128 for shadow screen
   On exit:
       XY?5  =byte read when reading

See Also

http://mdfs.net/Docs/Comp/BBC/Oswords

Jgharston 13:12, 26 May 2009 (UTC)

Retrieved from "http://beebwiki.mdfs.net/index.php?title=OSWORD_%265F&oldid=1241"

OSWORD