1.0 - Hax Assembler Overviw
The Hax Assembler (HASM) translates a hax assembly input (.hasm) file into a SIC/XE
compatible object program (.obj) which can be loaded by the Hax Loader.
This software is written for studying purposes.
1.1 - Hax Assembler Specifications
- SIC Format 1 and Format 2 support
- SIC/XE Format 3 and Format 4 support
- Literals support
- Program blocks support
- Relocatable programs only
- SIC/XE Register-to-Register instructions
- Addressing modes supported:
1. Immediate addressing
2. Indirect addressing
3. Base-relative indexing
4. PC-relative indexing
- Multiple-pass assembling
- Expression support
1.2 - SIC/XE Format Specifications
Instruction format field lengths are specified within {}, and are 1-bit long when
the braces are omitted.
1.2.0 - Format 1
Length: 1 byte
Format: [ opcode{8} ]
1.2.1 - Format 2
Length: 2 bytes
Format: [ opcode{8} ][ r1{4} ][ r2{4} ]
1.2.2 - Format 3 (SIC upward-compatible)
Length: 3 bytes
Format: [ opcode{6} ][n][i][x][b][p][e][ disp{12} ]
1.2.3 - Format 4 (SIC/XE only)
Length: 4 bytes
Format: [ opcode{6} ][n][i][x][b][p][e][ target address{20} ]
Notation:
Format 4 (extended) instructions are denoted by prefixing the first operand with '+', ie:
+LDT #MAXLEN