Eric Smith's Free Software

An eclectic assortment of software I've written, as well as a few programs by others that I've enhanced or just find useful.

Most of these programs are Free Software, and are freely redistributable under the terms of the Free Software Foundation's General Public License, Version 2 or Version 3, or, for a few programs, other licenses. See the web page for the specific program or the comments in the source code for definitive information on the license applicable to that program.

Non-GPL licenses are also available by arrangement with the author.

• altogether — a microcode-level simulator for the Xerox Alto personal workstation
• anyipd — a daemon for FreeBSD to automatically add proxy ARP and routing table entries for any machine on a LAN that has an IP address outside the LAN's configured subnet. This allows a user to plug in a machine (e.g., a laptop) with any IP configuration, and have immediate network access without reconfiguring. Source code will be available soon.
• asm21 — a crossassembler for the HP 21xx and HP 1000 series minicomputers, written in Perl. Intended to provide the exact functionality and exact listing output used by the HP assembler, as used to assemble the HP 2000C' Time Shared BASIC source code.
• barebones — an interpreter for the Bare Bones programming language
• bishops — solves the Gentle Bishops puzzle.
• BlackBox — a classic game.
• caption — a closed-caption decoder with serial output, based on Microchip PIC microcontrollers. A collaboration with Richard Ottosen.
• centsim — a simulator for the Atari Centipede and Millipede coin-operated video game hardware. Based on the vecsim project. Discovered some details of how the Atari POKEY chip works that allowed use of unpatched ROM images; this information was provided to the MAME developers. Obsolete, use MAME instead.
• dectape_decode — a program to extract block data from a raw DECtape image file.
• DESPICable — an implementation of the DES cryptographic algorithms for midrange Microchip PIC microcontrollers.
• diskii_nybble — a simple C program demonstrating how tables of valid nybbles for the Apple Disk II 13- and 16-sector disk formats my be generated.
• dmklib — a library to copy physical floppy disks (3.5-, 5.25-, and 8-inch) to DMK-format disk image files, and to read and write those image files. DMK format is commonly used for archival purposes or simulation because it preserves details of the disk format such as sector interleave.
• edit33 — a symbol editor for the DEC PDP-1 Type 33 Symbol Generator.
• elfcrc — a utility to insert a magic number, image length, and CRC into an ELF file, intended for use with ARM Cortex-M3 and -M4 microcontrollers.
• fduart — an interrupt-driven high-speed full duplex software UART virtual peripheral for the Ubicom (formerly Scenix) SX microcontrollers.
• ggps — a small GTK-based program to display GPS satellite information (satellites in view, SNR).
• glock — a GTK-based analog clock intended as a demo of an undecorated non-rectangular window using gtk_widget_shape_combine_mask(), moveable with the mouse using gtk_window_begin_move_drag().
• gSXprog — a command line interface for the Parallax SX-Key and SX-Blitz programmers for Ubicom (formerly Scenix) SX microcontrollers
• hexterm — a simple serial terminal program with hexadecimal input and hexadecimal dump w/ ASCII output, for debugging serial communication.
• ksim — an 8080 simulator.
• la2vcd — a utility to translate waveforms captured with HP and Agilent logic analyzers (e.g., 16500B) into a VCD file for use with a waveform viewer application such as GTKWave.
• lcdtest — a utility to display LCD monitor test patterns.
• mathdis — a disassembler for the microcode of the math box (2901-based bit-slice processor) used in the Atari Battlezone and Tempest coin-operated video games. May be useful as a base for developing disassemblers for other 2901-based systems.
• mmon — a tiny monitor program for MIPS processors, which does not require any RAM. Can download programs in S-record format.
• m2psd — an MPEG 2 Program Stream demultiplexer.
• m9312 — a utility to decode (or encode) PDP-11 boot PROMs.
• nonpareil — a microcode-level calculator simulator. Formerly known as CASMSIM. Now simulates more calculator models, including the HP-25, HP-35, HP-45, HP-55, and HP-80. Currently runs on Linux using GTK+, but should be easily ported to other platforms.
• ns16 — assembler and simulator for National Semiconductor PACE, first monolithic 16-bit microprocessor, and incomplete support for the even earlier National Semiconductor IMP-16 multi-chip processor.
• NSIM — a microcode-level simulator for the HP-41 calculator. Written for Unix and X11, but easily portable to other systems. Obsoleted by nonpareil.
• pdp1dump — dump PDP-1 RIM and BIN format paper tame images in human-readable format.
• psim — a crude PIC16C71 simulator with NTSC video support, which was used to debug PIC-Tock and PIC-Pong. Unless you need the video support, you may be better off with gpsim, a much more sophisticated PIC simulator.
• r5test — a program I hacked together to recover from accidentally wiping out the metadata of a RAID 5 on a 3ware controller.
• SERVID — a serial video display using a Ubicom (formerly Scenix) SX microcontroller, generating the video in software. A collaboration with Richard Ottosen. We won the SXlist Video Challenge.
• shdis, a flow-tracing disassembler for the Renesas (formerly Hitachi) SH1 RISC processor.
• skipjack — an implementation of the SKIPJACK cryptographic algorithms for Ubicom (formerly Scenix) SX microcontrollers and midrange Microchip PIC microcontrollers.
• srecutil — utilities to convert object files between Motorola S-Record, Intel Hex, and raw binary format, and to split files. I don't think this version was my latest, as the Intel Hex file support doesn't seem to present. In any case, it is obsolete, and you should use Peter Miller's srecord package instead. It's much more capable and is actively maintained.
• tapeinfo — a utility to read logs and other information from the HP C1533A DDS2 tape drive; may be useful on other HP DDS drives.
• tapeutils — copy tapes (9-track, Exabyte, DDS, etc.) to/from tape image files. Includes a tapeio library which provides an API for dealing with tapes and tape image files.
• theseus — solves the "Theseus and the Minotaur" puzzle.
• tsbutils — extract and decode programs and data files from HP 2000 Access Time Shared BASIC hibernate, sleep, or dump tapes or tape images.
• TTYHAN — a Baudot Teletype driver for the Apex operating system. From around 1981, this is the earliest program I've written for which I have machine-readable source code.
• tumble — create PDF files from TIFF and JPEG images, useful for scanned documents
• vecsim — a simulator for the Atari vector display coin-operated video game hardware. Also contained a simplistic attempt at binary translation. A collaboration with Hedley Rainnie. Some of the vector generator and math box code lives on in MAME. vecsim is obsolete, use MAME instead.
• verbum — a program to punch human-readable text on paper tape.
• vobdump — a program to decode DVD .VOB files. Not complete, but handles enough of the format to be somewhat useful.
• WREC — a program to reform large aluminum electrolytic capacitors, using an SCPI-programmable power supply such as the Agilent E3631A.

Free Software written by others, that I've patched, modified, or enhanced:

• dis6502 — a flow-tracing disassembler for the 6502, originally written by Robert Bond with enhancements by Udi Finkelstein and me.
• gop_fixup — a program to fix GOP timestamps in MPEG 2 program streams. This is a very small patch to avoid an assertion when used with files encoded by a Hauppauge WinTV PVR 350 card and the IVTV driver, as used with MythTV.

Free Software written by friends, that I recommend:

• nc — a network build tool. Similar to distcc, but better (IMNSHO). Works with make or SCons.

Free Software written by others, that I'm redistributing:

• kx10 — PDP-10 simulator by Stu Grossman
• MysqlTool — a MySQL database administration program, by Joseph Ingersoll of Dajoba, LLC
• PALASM and PLEASM — logic compilers for PAL and PROM chips, written in FORTRAN
• rpm-cvs — CVS to RPM conversion program, by Michael Beach

Other software projects that I've contributed to:

• MAME — the Multiple Arcade Machine Emulator — Atari analog and digital vector generator simulation code and Battlezone/Tempest math box simulation code (originally from vecsim)

Other Free Software I use:

I use a lot of common free software, such as the GNU software (including GCC) and Linux. But here are some lesser known program I've found to be quite useful:

• AS macro cross assembler by Alfred Arnold
• SCons, a better build tool than make
• Subversion, a much improved replacement for CVS

Last updated January 3, 2015 Copyright 2003, 2004, 2005, 2006, 2008, 2012, 2014, 2015 Eric Smith spacewar@gmail.com

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