tjc@castle.ed.ac.uk (A J Cunningham) (08/07/90)
Please don't reply to me as I'm posting this for my boss. Replies to P.Moran@uk.ac.ed.castle We have a DOS based communications package which provides support for a wide variety of networks (X.25,ISO CONS,Netbios gateways etc). The applications communicate with the underlying network support module via a Software interrupt interface. The network support program opeates as a DOS TSR and the app is a stnadrd DOS or Window application. The app issues an INT nn which the network module responds to. We provide versions of these applications which operate under Windows amd run under Windows 2 and Win386. We need to make these applications also operate under Win 3 in enhanced 386 mode. There would appear to be two problems in doing this 1)we need to force the processor into real mode to allow the DOS TSR to run when the 'INT' or an equivalent is invoked. 2)We need to have at least one memory are that both the Windows app and the DOS TSR can access so that they can exchange information. I have access to the Windows 3 SDK beta release but cannot find anything in it which suggests how we could enable the windows app to communicate with the DOS TSR. Is there anything in Windows3 which we could use to set up this communication. We cannot simply re-write all the DOS TSRs as there are too many of them and other people provide such modules for different networks.