Thanks for taking a close look at that, Eric. Speculating as to why the author did this, the only thing I can observe is that this comes from an old DOS Point-Of-Sale system. It apparently used CBIS Desk-To-Desk for its network functions, but I have have seen some evidence that the POS application (PRISM) was installed on the machines with further customizing of the network installation, either for performance or proprietary protection.
So even if the system will support FreeDOS SHARE as a substitute, there is the question of its similarly problematic NPS.EXE, which may be a Network Print Server. (There is so little known about these particular old applications.) Unless I can find a supported substitute for that, I would be locked into using MS-DOS 6.22 ----- Original Message ----- From: Eric Auer To: freedos-user@lists.sourceforge.net Sent: Friday, August 18, 2006 2:47 PM Subject: Re: [Freedos-user] "Incorrect DOS version" even with Version=6.22 Hi John, > - This concerns SHARE installed by CBIS Desk-To-Desk (not FreeDOS SHARE), > temporarily available at [...] > - Testing still failed with HIMEM and EMM386 not loaded... I ran your SHARE in DOSEMU. It indeed insists that the DOS version is 6.22, and it does something bad: 0439:0adb B452 mov ah,0x52 0439:0add CD21 int 0x21 0439:0adf 26C6060303FF mov es:[0303],0xff 0439:0ae5 FA cli 0439:0ae6 BE0C0A mov si,0a0c 0439:0ae9 BF9000 mov di,0090 0439:0aec B91E00 mov cx,001e 0439:0aef F3A5 repe movsw 0439:0af1 26833E440000 cmp es:[0044],0000 0439:0af7 754F jne 0b48 ... In other words, it asks DOS for the location of some internal data structure, then ignores the exact location, and uses the memory block which contains the data structure to as a target for overwriting 1 plus 60 bytes of data. In short, your SHARE modifies the DOS kernel, because it believes that it knows what it is doing. This will work with no other kernel except the MS DOS 6.22 one... I wonder why the author of that SHARE made it so limited. I mean it will not even work with any other version of MS DOS... FreeDOS crashes at the first time when SHARE asks the DOS kernel to do anything useful after that, because SHARE has overwritten parts of the kernel. Eric ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Freedos-user mailing list Freedos-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-user ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Freedos-user mailing list Freedos-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-user
