Abstract
This module supplies procedures for reading from and writing to MMIX memory addresses that exceed 48 bits. Such addresses are used by the operating system for input and output, so they require special treatment. At present only dummy versions of these routines are implemented. Users who need nontrivial versions of spec_read and/or spec_write should prepare their own and link them with the rest of the simulator.
Many I/O devices communicate via bytes or wydes or tetras instead of octabytes. So these prototype routines have a size parameter, to distinguish between the various kinds of quantities that MMIX wants to read from and write to the memory-mapped addresses.
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© 1999 Author and Springer-Verlag Berlin Heidelberg
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Knuth, D.E. (1999). MMIX-MEM. In: MMIXware. Lecture Notes in Computer Science, vol 1750. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-46611-8_6
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DOI: https://doi.org/10.1007/3-540-46611-8_6
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-66938-8
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