| DOS/4GW 1.97 | DOS/4GW 2.01 | DOS/4GW Professional | DOS/4G for Watcom | |
|---|---|---|---|---|
| Purchase from | WATCOM | Update from Tenberry | Tenberry | Tenberry |
| Price (plus shipping) | free with compiler | $49 | $299 | $999 |
| Documentation -- User's Guide | $49 | $49 ($89 in bundle) | Included | Included |
| Documentation -- Programmer's Guide | Not available | Not available | Not available | Included |
| Licensing/Royalties | royalty-free | royalty-free | 10 copies bundled, $500/250 add'l copies | 100 copies bundled, $500/250 add'l copies |
| Support: Email | unofficial | unofficial | $500/year | full support free for 30 days |
| Support: FAX/Phone | WATCOM only | unofficial | $250/qtr | please call |
| Compilers Supported | Watcom C/C++ Watcom Fortran | Watcom C/C++ Watcom Fortran | Watcom C/C++ Watcom Fortran | Watcom C/C++ Watcom Fortran |
| Linkers | WLINK | WLINK | WLINK | WLINK; GLU or 3rd party |
| Debugger | WVIDEO or WD | WVIDEO or WD | WVIDEO or WD | WVIDEO or WD; D32 or 3rd party |
| Virtual Address Space | 32 MB | 32 MB | 128 MB | 4 GB |
| Physical Address Space | 32 MB | 32 MB | 64 MB | 64 MB (Currently -- more later) |
| Memory Models | zero-based flat | zero-based flat | zero-based flat | zero-based flat |
| .EXE format | LE or LX | LE or LX | LE or LX | LE or LX; BW, NE, or mixed with handholding |
| DLLs | No | No | No | Yes |
| TSR's | No | No | No | Yes |
| Virtual Memory | available | available | faster | fastest |
| Demand Loading | No | No | Yes | Yes |
| Footprint (low) | 29K-54K or more | 29K-54K or more | 29K-54K or more | 29K-54K or more |
| Footprint (ext.) | 314K and up | 314K and up | 276K and up | 284K and up |
| Disk Overhead | 259K | 259K | 154K + VM (58K) | 164K + VM (58K) |
| Configurability | low | low | low | high |
| Load Multiple Programs on a Single Extender | No | No | No | Yes |
| C API | No | No | No | Yes |
| Interrupt Control | limited | limited | limited | full API |
| Translatable Error Messages | No | No | No | Yes |
| DPMI Coverage | limited 0.9 | limited 0.9 | limited 0.9; INT 31h, 301h-304h | most 0.9, some 1.0 |
| Documentation | WATCOM | complete manual | complete manual | 2-manual set |
| Bound Extender | No | No | Yes | Optional |
Tenberry Software has created three levels of DOS extender for Watcom users: DOS/4GW, DOS/4GW Professional, and DOS/4G for Watcom.
DOS/4GW v.1.97 is the 32-bit DOS extender bundled free with the purchase of Watcom C/C++ or Watcom Fortran. The manual for DOS/4GW, and an update to v.2.01, are available from Tenberry Software. Order Online.
DOS/4GW Professional provides all the power of DOS/4GW, plus:
DOS/4GW Professional is fully compatible with programs written for DOS/4GW 1.9 and up. The only functional difference is that the extender is bound to your program instead of residing in a separate file. Not only does this help reduce startup time, but it eliminates version-control problems when someone has both DOS/4GW and DOS/4GW Professional applications present on one machine.
Price of $299 includes 10 run-time (distribution) copies. Order Online.
DOS/4G is Tenberry's top-of-the-line 32-bit extender. DOS/4G for Watcom offers all the features of DOS/4GW and DOS/4GW Professional, plus:
Special Watcom-only price is $999 and includes the special Development Kit plus 100 run-time licenses, 2 manual set, 30 day support, and optional support and enhancement services. Contact <sales@tenberry.com>