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collapseos
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Mirror of CollapseOS
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collapseos/blk/290

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  1. lbluflw BSET ( abortUnderflow )

  2.     DE BIN( @ 0x06 ( uflw ) + LDdd(n),

  3.     JR, lblexec BWR

  4. lblchkPS BSET ( chkPS )

  5. ( Note that you only need to call this in words that push

  6.   back to PSP. If they don't, calling chkPS is redundant with

  7.   check in next )

  8.     EXX,

  9. ( We have the return address for this very call on the stack

  10.   and protected registers. 2- is to compensate that. )

  11.     HL PS_ADDR 2- LDdn,

  12.     SP SUBHLd,

  13.     EXX,

  14.     CNC RETc, ( PS_ADDR >= SP? good )

  15.     JR, lbluflw BWR