Difference between revisions of "OSBYTE &84"
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Revision as of 23:58, 28 August 2013
OSBYTE &84 (132) - Read top of user memory
On exit X and Y point to the first byte after the top of user memory, used to initialise BASIC's 'HIMEM'. If b7 of A is clear, then A:Y:X holds the 23-bit address of the top of user memory, as when running 6502Turbo code on a CoProcessor, which returns A=&04, XY=&0000.
See Also
Jgharston 21:59, 26 May 2009 (UTC)
