Re: RPG on other platforms...

[qappdsn@xxxxxxx]

Jim Welsh wrote:

> This is a second attempt to get this message to the group, first one
> never showed up...
>
> Yo Guru's...
>
> I have a question
>
> I've been asked by my employer to do some research on the effects of
> running an RPG III
> program on platforms other than the AS400.
>

If you have source code, check out Baby/400 for a PC based solution.  At the
object level I don't believe there are any other choices.  The Model 150 or 170
might be your low cost offload solution.

As far as your information on reentrant goes: All programs on the AS/400 are
reentrant by nature.  There is no special coding required.  The compiler creates
an object which contains the instruction set and base memory offset to the data.
Each user upon calling the program will be assigned a base memory address for
their data and control information to track the current instruction being
executed.  So A + B = C turns into OffsetForA + OffsetForB = OffsetForC and is
executed as (UserBaseAddress+OffsetForA) + (UserBaseAddress+OffsetForB) =
(UserBaseAddress+OffsetForC).

Special coding was required for the S/36 MRT programs which were a crude attempt
at reentrant concept: one copy of instructions, many copies of data.



+---
| This is the Midrange System Mailing List!
| To submit a new message, send your mail to "MIDRANGE-L@midrange.com".
| To unsubscribe from this list send email to MIDRANGE-L-UNSUB@midrange.com.
| Questions should be directed to the list owner/operator: david@midrange.com
+---