eiowlta
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5bc6be0a70
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single byte operands for bit functions, register pointer offsets
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2023-07-21 18:00:07 +03:00 |
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eiowlta
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e734528c26
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allow dst to be used to increment by 2, 4 or 8
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2023-07-20 16:51:37 +03:00 |
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hyenasky
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6348e233d0
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fix the semantics of the HALT instruction
makes it useful for saving host cpu usage again
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2023-06-06 18:06:55 -06:00 |
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hyenasky
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8c4967cb13
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fix several edge case interactions between page faults and instruction execution
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2023-03-14 08:24:49 -06:00 |
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jn
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c739f8ecb3
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Refactor physical memory address resolution code
The physical memory layout is the same whether we use the MMU or not, so
let's implement it only once.
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2023-02-01 23:51:15 +01:00 |
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jn
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4758c45171
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Fix skipping of CMP instructions
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2023-01-27 17:37:10 +01:00 |
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jn
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6ddf60fba6
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Handle division by zero instead of crashing
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2023-01-27 11:33:26 +01:00 |
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jn
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1d9de64e5f
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Print IP and SP in debug mode
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2023-01-27 11:33:26 +01:00 |
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jn
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bf38917ee0
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Fix number of operands for OP_FLP in instruction info table
FLP takes a source operand.
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2022-12-31 12:17:29 +01:00 |
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Ry
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3246859ff2
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Revert previous commit
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2022-12-25 23:38:26 -08:00 |
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Ry
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acbfa82a18
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If halted, report that the entire tick was completed
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2022-12-25 23:24:03 -08:00 |
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Ry
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3d1dff8495
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BRK exceptions should resume *after* the BRK instruction
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2022-10-27 19:03:34 -07:00 |
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Ry
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3608796e88
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Fix a few formatting things
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2022-10-26 18:03:00 -07:00 |
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hyenasky
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072cb452e1
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make writes to readonly pages cause a page fault correctly
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2022-10-26 18:03:00 -07:00 |
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hyenasky
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7d383cff3c
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add int instruction, make cross-page accesses work
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2022-10-26 18:03:00 -07:00 |
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Ry
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b06f6de79c
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Implement a somewhat hacky MMU
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2022-10-26 18:03:00 -07:00 |
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Ry
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8f0c4e6c51
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Add docs, add exception handling, rearrange some instrs
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2022-10-26 18:03:00 -07:00 |
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Ry
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53cbc0d96c
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Implement overlays
Co-authored-by: Lua MacDougall <lua@foxgirl.dev>
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2022-10-23 13:16:40 -07:00 |
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Ry
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5804084401
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Initial commit
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2022-10-22 18:00:51 -07:00 |
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