SMA16

Introduction

SMA16 is a compact RISC-ish 16/12-bit architecture. SMA16 lends itself to simple VMs due to the small number of instructions and it's support for partial implementations of the instruction set. This does not, however, mean it is simple to write for as self modifying code is a requirement for any mildly complex program.

Architecture

For architecture documentation, see SMA16.md.

Components

sma16vm.c

sma16vm.c is a simple VM for the architecture.

Usage

make
./sma16vm program.bin

sma16asm.py

sma16asm.py is a simple assembler for the architecture.

Usage

python3 sma16asm.py program.a16 --output program.bin

Example Assembly

.vec.reset @main
.vec.fault @RESET_VECTOR

.sec program

main:
  load @hi
  store @SMALL_OUT
  halt
  
.sec constant

hi: .const s"hi"

TODO

• Add support for .var directive to specify variable in addition to .const.
• Add support for %X to propagate constants and not their addresses.