SicTools

Tools for SIC/XE hypothetical computer from the Leland Beck's book System Software. Includes:

• Assembler
• Simulator
• Linker

Assembler

Assembler supports all instructions and directives described in the book. This includes load/store instructions, arithmetic instructions, jumps etc. And directives START, END, ORG, LTORG, BASE, NOBASE, CSECT, USE, EQU, RESB, RESW, EXTDEF, EXTREF. Some features:

• immediate addressing, indirect addressing, simple addressing
• PC-relative addressing, base addressing (BASE and NOBASE directive), indexed addressing
• standard directives START, END, ORG
• support for literals, LTORG directive
• support for EQU expressions, full forward and backward references resolved via the algorithm described in the book
• support for sections via CSECT directive
• support for blocks via USE directive
• assembler syntax is (see command line options) more flexbile and free than original
• floating-point syntax extensions (FLOT and RESF directives)
• syntax extension for specifying numbers in binary, octal, decimal and hexadecimal format
• generates debugging-friendly listing file showing original source and corresponding address and generated code
• generates log file showing code statistics, list of blocks, list of sections, list of symbols, list of literals, list of relocations
• and more

Simulator

Simulator is user-friendly GUI based application that loads asm or obj files. Features:

• CPU view of registers and current instructions, shows changed registers in different color, supports changing registers values
• disassembly view with breakpoints and data breakpoints
• memory view with full edit support in hexadecimal and character mode
• watch view with symbols from assembly file
• textual screen support
• devices 0, 1, 2 are redirected to standard input, output and error
• detected pseudo HALT instruction (jump on itself)
• automatic execution with set speed (from 1 Hz to 1 MHz)
• keyboard input
• and more

Linker

Linker supports linking .obj files produced by the assembler into one. Each object file can have multiple control sections and needs to be relative. Other features include:

• a graphical interface for selecting .obj files and choosing the linker settings
• inspecting, editing and reordering control sections or symbols in a gui or textual interface
• partial linking when some of the references are not present
• option to keep symbols in the output file to allow further linking
• and more

See also http://jurem.github.io/SicTools/ for the main page as well as https://github.com/jurem/SicDemos for several examples.

Installation

SicTools may be downloaded as a JAR file or built from source.

JAR

Download the latest stable version from releases. You may need to change the file permissions to allow execution.

Building from source

Download / clone source code and run make.

git clone https://github.com/jurem/SicTools.git
cd SicTools
make jar

Usage

To run simulator

java -jar out/make/sictools.jar

To run assembler

java -cp out/make/sictools.jar sic.Asm source.asm

where source.asm is the file to be compiled.

To get assembler help

java -cp out/make/sictools.jar sic.Asm -help

To run linker

java -cp out/make/sictools.jar sic.Link -o out.obj in1.obj in2.obj ...

where out.obj is the output file and in1.obj, in2.obj,... are .obj files to be linked.

To get linker help

java -cp out/make/sictools.jar sic.Link -help

To get graphical linker interface

java -cp out/make/sictools.jar sic.Link -g