Re: Alsys Ada Compiler for MS-DOS

["Randy Brukardt" <randy@rrsoftware.com>]

Debs Wisbey wrote in message ...
>"Randy Brukardt" <randy@rrsoftware.com> wrote in message
news:<vcss9g3e338ka1@corp.supernews.com>...
>> Debs Wisbey wrote in message ...
>> >All,
>> >
>> >I currently have a software program that is written in Ada and built
>> >using the Alsys Ada 286/DOS compiler v4.3, with the target hardware
>> >being an old 286 with operating system MS-DOS v4.01.  I want to port
>> >the software to a more modern compiler but am unable to upgrade any
of
>> >the target hardware/software.
>> >
>> >Can anyone suggest any good Ada compilers for DOS that will enable
me
>> >to do a straight port of the software without having to change the
>> >target hardware/software specifications?
>>
>>
>> The only Ada compiler that I know of that's still supported targeting
>> MS-DOS and 186/286's is ours: Janus/Ada (at
http://www.rrsoftware.com).
>> And that's still an Ada 83 compiler; we never made an Ada 95 version.
>>
>>                 Randy.
>
>I was wondering, could I compile on Win NT using Janus/Ada 83 and then
>run the executable on a 286?

Well, the vanilla DOS version would run on Win NT (it is just an MS-DOS
program without much extra). But it's limited in the size of programs it
compiles (the symboltable has to fit in 640K, and Text_IO takes up more
than half of the available space). The DOS Extender hosted version of
Janus/Ada 83 (which is not limited in the size of programs) doesn't work
on Windows NT, although it does work on Windows 95/98/ME. The DOS
Extender company went out of business instead of fixing it when we
complained. :-(

It would be possible to compile a Windows NT hosted version of the
Janus/Ada 83 compiler, but it would take a bit of work (because of Ada
83-95 incompatibilies and system-dependent code). So we'd have to charge
a bit extra for that. Write me a note at randy@rrsoftware.com if you're
interested.

                  Randy Brukardt.






>Thank you, Debs.