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- STABLE ABI: As a compatible binary, this binary follows the
- same stable ABI as its z80 counterpart.
-
- PS CHECKS: Unlike z80 boot code, we don't check PS at each next
- call (we do check RS though). It is the responsibility of every
- native PSP-modifying word to call chkPS, . Also, chkPS, is a
- bit different than in z80: it is parametrizable. The idea is
- that we always call chkPS, before popping, telling the expected
- size of stack. This allows for some interesting optimization.
- For example, in SWAP, no need to pop, chkPS, then push, we can
- chkPS and then proceed to optimized swapping in PS.
-
- To assemble, load blocks 805 through 820.
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