mirror of https://github.com/hsoft/collapseos.git
17 lines
656 B
Plaintext
17 lines
656 B
Plaintext
8086 boot code
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Code in the following blocks assemble into a binary that is
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suitable to plug into Core words (B350) to achieve a fully
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functional Collapse OS. It is structured in a way that is
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very similar to Z80 boot code (B280) and requires the same
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constants to be pre-declared.
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RESERVED REGISTERS: SP is reserved for PSP, BP is for RSP and
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DX is for IP. Whenever you use these registers for another
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purpose, be sure to protect their initial value. Like with
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Z80, you can use SP freely in native code, but you have to make
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sure it goes back to its previous level before next is called.
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(cont.)
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