Difference between revisions of "OSWORD &06"
(Added transfer routines.)
m (1 revision)
Revision as of 00:58, 29 August 2013
OSWORD &06 (6) - Write I/O processor memory Acorn MOS 1.20 and later
On entry: XY!0=address to write to XY?4=byte to be written.
Some systems recognise screen memory at &FFFExxxx and sideways ROMs at &FFFr8000-&FFFrBFFF.
The following routines can be used to copy data to and from I/O memory
regardless of the location of the calling program. It requires
X%=>5-byte control block,
DEFPROCmem_rd(io%,mem%,num%) A%=5:REPEAT !X%=io%:CALL&FFF1:?mem%=X%?4 io%=io%+1:mem%=mem%+1:num%=num%-1 UNTILnum%<1:ENDPROC : DEFPROCmem_wr(io%,mem%,num%) A%=6:REPEAT !X%=io%:X%?4=?mem%:CALL&FFF1 io%=io%+1:mem%=mem%+1:num%=num%-1 UNTILnum%<1:ENDPROC
Jgharston 23:54, 30 October 2011 (UTC)