mirror of https://github.com/hsoft/collapseos.git
17 lines
735 B
Plaintext
17 lines
735 B
Plaintext
BIN( is the addr at which the compiled binary will live. It is
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often 0.
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ORG is H@ offset at which we begin spitting binary. Used to
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compute PC. To have a proper PC, call "H@ ORG !" at the
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beginning of your assembly process. PC is H@ - ORG + BIN(.
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Labels are a convenient way of managing relative jump
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calculations. Backward labels are easy. It is only a matter or
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recording "HERE" and do subtractions. Forward labels record the
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place where we should write the offset, and then when we get to
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that point later on, the label records the offset there.
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To avoid using dict memory in compilation targets, we
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pre-declare label variables here, which means we have a limited
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number of it. For now, 4 ought to be enough. (cont.)
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