Difference between revisions of "OSWORD &5F"
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Latest revision as of 19:13, 8 March 2015
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
Jgharston 13:12, 26 May 2009 (UTC)
