If you did everything correctly console window of the first DOSBox instance should report something like this: Serial1: Nullmodem server waiting for connection on port 5000. Serial1 nullmodem server:127.0.0.1 port:5000Īdjust the port number accordingly if you provided different one in the first DOSBox instance. Next run second instance of DOSBox and at the command prompt type: The port number can be different from the above example but 5000 should be safe both on Windows and Linux systems. Now run first instance of DOSBox without NoConsole option and at the command prompt type: In first option you need to prepare additional DOSBox configuration file and provide at least TDREMOTE.EXE file. If you don’t need full isolation between host and remote debugging machine you can get away with second option. The second option is easier as both DOSBox instances will share the same files, unless you plan to overwrite debugging binary or the binary you are debugging could be dangerous to the DOSBox emulated file system. In first case you can later use TD or TRF.EXE to transfer files from one DOSBox to the second over the “cable”. Configuring DOSBoxįirst of all you have to choose if you would like to have 2 separate DOSBox configurations or just run single configuration twice as separate instances. Also please note that earlier version of Turbo Debugger also support remote debugging. If you are using different version or settings your mileage may wary. Dos box is not supporting debug registers for example so some functionality of TD on 386 and higher CPUs is not available.įor providing nullmodem cable emulation I’ve been using Turbo Debugger 5, DOSBox 0.74 under Windows 7 圆4. Fortunately Turbo Debugger works partially under DOSBox. Unfortunately none of those two great debuggers work under DOSBox. Much later came SoftICE that was capable to debug Windows on single PC. In fact most early Windows debuggers like Periscope32 for Windows required second PC connected with nullmodem cable. One of best debuggers that I have been able to use later as remote debugger was Periscope. This was great aid in debugging application using graphic modes.

Later same debuggers provided ability to use two monitors if you would add Hercules graphic card for the second display. It requires either network link or serial connection through nullmodem cable that can be emulated under DOSBox.īack in the DOS days, when I got my hands on first debugger that offered remote debugging capability I could only dream about being able to get second PC just for debugging purposes. Among many different features Turbo Debugger offers remote debugging capability.

Turbo debugger dosbox