Q33364: Small-Memory Model and Far Routines

Article: Q33364
Product(s): See article
Version(s): 4.00 5.00 5.10 | 5.10
Operating System(s): MS-DOS | 5.10
Keyword(s): ENDUSER | | mspl13_c
Last Modified: 27-JUL-1988

Question:
   Is it incorrect to call a routine with a far call in the small
memory model?
   When I try to call a C routine with a far call (from assembler),
the CS register never changes and items start to be executed from the
current CS instead of the one my routine is at. Are there any rules
that must be followed to make a far call in the small-memory model?

Response:
   In order for this to work correctly you need to be sure that the
function is declared and defined as a far function (e.g. int far foo()).