The Language

T32 source files use the .s32 extension. The language is intentionally small and easy to scan.

Comments

Comments start with ; and continue to the end of the line.

; this is a comment
LDI 65     ; this is also a comment

Instruction names are written as mnemonics such as LDI, LDA, ADD, and HLT.

LDI 72
PRT
HLT

You can write numeric operands in decimal or hexadecimal.

Examples:

LDI 65
LDI $41
LDP $1234

Labels mark addresses in the program. They are useful for jumps, subroutines, and data locations.

start:
    LDI 65
    PRT
    HLT

You can then refer to that label as an operand:

JMP start

T32 also supports local-looking sublabels that begin with @. A sublabel is scoped under the most recent top-level label.

printstr:
@loop:
    LDA
    CMI $00
    JEQ @done
    PRT
    IDP
    JMP @loop
@done:
    RET

Inside printstr, the assembler treats @loop and @done as labels under that section.

T32 supports two simple directives for embedding data directly in the program.

Use .data for raw bytes:

bytes:
    .data $48, $69, $21, $00

Use .ascii for a quoted string:

message:
    .ascii "Hello"
    .data $00

Common escapes supported by the parser include \n, \r, \t, \\, and \".