Trial VersionVersion 1.3 (April 2008)
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Version 1.3 (April 2008)
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The COMM Extender enables 16 bit Software (DOS or Win16) that uses COMM ports via direct register programming to run in Windows NT, Windows 2000 and Windows XP environment.
With COMM Extender it's now easy to run your "old" DOS communication software in modern Windows. With ease you connect to standard serial ports like COM1/COM2, serial ports on a PCI card, serial ports on a USB adapter or Ethernet port server. Near every serial port visible in Windows is accesible.
Need to support higher baud rates with your DOS software? You can easily configure baud rates higher than 115200 bps with COMM Extender. You can also fix the baud rate no matter your DOS software sets.
COMM Extender runs completely in background. No visual user interface.
COMM Extender does not consume any resources if no 16 bit application is currently using it.
After installation of COMM Extender a default configuration will be created and 16 bit communication software can be started immediately without even rebooting Windows.
The default configuration can be easily changed.
Sample configuration:
Using Windows COM2 with a 16bit DOS program that uses direct hardware access to port address 2F8 and interrupt 3.
[PORT1]
BASE=2F8
IRQ=3
WIN32COM=2
COMM Extender supports eight (8) ports. Custom implementations supporting more ports are possible (PORT1 to PORT8). The used Windows Number "WIN32COM" can be any one between 1 and 255.
COMM port Redirection
COMM Extender also supports Port-Redirection to any Windows COMM Port. It's easy to setup a configuration to redirect i.e DOS COM1 (3F8, IRQ4) physically to the WIN32 COM5. Thus the 16bit application will use as usual 3F8, IRQ4 but the data will physically go via Windows COM5.
[PORT1]
BASE=3F8
IRQ=4
WIN32COM=5
The Windows COMM port can any serial device visible in Windows control panel as serial COMx (internal COM1/COM2, serial PCI card, USB to Serial, Ethernet to Serial, PortServer etc.)
Rewrite a 16bit software ?
It's for sure the most welcomed solution but not always possible and affordable. COMM Extender provides a fast and cost effective solution.
Requirements
In order to work with COMM Extender, a 16 bit communication program has to use direct port access to the serial hardware (UART) or calling the BIOS function. Since most of the times it's unknown what functions a program uses a time limited version is available here.
Software packages (Price list)
| Product | Amount of License* |
| COMM-Extender/1 | 1 |
| COMM-Extender/3 | 3 |
| COMM-Extender/5 | 5 |
| COMM-Extender/10 | 10 |
