diff options
Diffstat (limited to 'twasm/README.md')
| -rw-r--r-- | twasm/README.md | 28 |
1 files changed, 14 insertions, 14 deletions
diff --git a/twasm/README.md b/twasm/README.md index 6509be7..8d0ce3b 100644 --- a/twasm/README.md +++ b/twasm/README.md @@ -95,15 +95,15 @@ label definitions are stored and recalled from this table. The memory addresses ``` 16 bytes -+---------+ -| 127 64 | -+---------+ -| address | -+---------+ -| 63 0 | -+---------+ -| hash | -+---------+ ++----------+---------+ +| 127 96 | 95 64 | ++----------+---------+ +| reserved | address | ++----------+---------+ +| 63 0 | ++--------------------+ +| hash | ++--------------------+ ``` #### awaiting label table (ALT) @@ -113,7 +113,7 @@ forward references are stored in this table to be filled in after assembly is ot ``` 16 bytes +----------+----------+------------------+---------+ -| 127 105 | 104 104 | 103 96 | 95 64 | +| 127 101 | 100 | 99 96 | 95 64 | +----------+----------+------------------+---------+ | reserved | abs flag | # bytes reserved | address | +----------+----------+------------------+---------+ @@ -263,7 +263,7 @@ entries are as follows: | 63 56 | 55 48 | 47 40 | 39 32 | +----------+---------------+---------------+------------------+ | opcode | opcode | opcode | opcode | -| dst=rel8 | dest=rel | dst=imm8 | dst=imm | +| dst=rel8 | dst=rel | dst=imm8 | dst=imm | +----------+---------------+---------------+------------------+ | 31 24 | 23 16 | 15 0 | +----------+---------------+----------------------------------+ @@ -319,7 +319,8 @@ rel ; rel 16/32 rel8 ; rel 8 opX&8 ; low 8 bits are the operator flag that goes with opcode at offset X from - ; the first opcode in the table entry + ; the first opcode in the table entry. High bit is (somewhat confusingly) + ; a flag for whether or not the operator comes with an `0F` prefix ``` note much room to expand. If an opcode doesn't exist, it should be 0x00 @@ -431,8 +432,7 @@ supported tokens are listed below | db | 0x0100 | pseudo-operator | | | 0x10XX | some memory address; `XX` is as specified below | | | 0x20XX | some constant; `XX` is as specified below | -| | 0x3XXX | some label definition; `XXX` is its entry index in the label table | -| | 0x4XXX | some label reference; `XXX` is its entry index in the label table +| | 0x3XXX | some label; `XXX` is its entry index in the label table | | | 0xFEXX | used to pass some raw value `XX` in place of a token id to a couple of functions that mention this as a feature. If the function doesn't mention it, it will lead to undefined behaviour | | | 0xFFFF | unrecognised token | |