README.md
April 13, 2026 ยท View on GitHub
#simh support/migration tools.
The tools are organized into categories, each of which has a subdirectory.
For consistency, each tool has its own subdirectory, even if it only contains a single file. (READMEs for tools without them are welcome)
Configuration support
Tools to assist with configuring a simulator.
| Directory | Contents |
|---|---|
| config11 | Calculate the floating address space layout of a PDP-11 or VAX. |
Converters
Tools that convert/support simulator data file formats
| Directory | Contents |
|---|---|
| asc | Convert ASCII file line endings |
| decsys | Convert decimal listing file to a DECtape file |
| dtos8cvt | Convert a PDP-8 DECtape image from OS/8 format to simulator format |
| gt7cvt | Convert a gt7 magtape dump to a SIMH magtape |
| hpconvert | Convert an HP disc image between SIMH and HPDrive formats |
| imd2dsk | Convert an ImageDisk (IMD) file to DSK (pure data) |
| indent | Convert simulator sources to 4-column tabs |
| lbn2pbn | Logical-to-physical (and reverse) converter for single-sided floppy disk images |
| littcvt | Remove density maker from litt format tapes |
| m8376 | Assembles 8 PROM files into a 32bit binary file |
| mt2tpc | Convert a simh simulated magtape to TPC format |
| mtcvtfix | Fix a SIMH magtape containing a misread EOF |
| mtcvtodd | Convert an E11 magtape (with odd record sizes) to SIMH |
| mtcvtv23 | Convert a tape image in .TPC format to SIMH (.tap) |
| noff | Remove |
| sfmtcvt | Convert a Motorola S format PROM dump to a binary file |
| strrem | Remove a string from each line of a file |
| strsub | Substitute a string in each line of a file |
| tar2mt | Convert a tar file to a simulated 8192B blocked magtape |
| tp512cvt | Convert a tp data file to a simulated 512B blocked magtape |
| tpc2mt | Convert a TPC simulated magtape to simh format |
Cross-assemblers
Cross-assemblers for various machine architectures
| Directory | Contents |
|---|---|
| hpasm | Assembler for the HP2100 |
| macro1 | Assembler for the PDP-1 |
| macro7 | Assembler for the PDP-7 |
| macro8x | Assembler for the PDP-8 |
| macro11 | Assembler for the PDP-11. Synchronized from git https://gitlab.com/Rhialto/macro11.git; most recently from tag macro11-v0.7.2. |
Extracters
Data extraction tools
Except as noted, all read SIMH tape container format.
| Directory | Contents |
|---|---|
| backup | Extract files from a TOPS-10 backup tape |
| ckabstape | Disassemble 18-bit binary paper tape |
| mmdir | List directory of Interdata MDM tape |
| mtdump | Dump the record structure of a SIMH, E11, TPC, or P7B |
| ods2 | Directory, Copy & Search commands for VMS ODS2 disk images |
| rawcopy | Create SIMH disk image from physical media on RAW device. |
| rstsflx | Manipulate PDP11 RSTS file systems. |
| sdsdump | Disassemble SDS SDS paper tape |
| tpdump | Dump files on IBM 1401 tape |
File systems
Provide access to a foreign files system from a host machine.
| Directory | Contents |
|---|---|
| putr | Read (and write some) DEC filesystems from PCs |