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Inside Macintosh: Mac OS Runtime Architectures /

Appendix B - The RTLib.o and NuRTLib.o Libraries / Runtime Operations

kRTGetVersion and kRTGetVersionA5

The operation kRTGetVersion returns the value of the current A5 world and kRTGetVersionA5 returns the value of the specified A5 world.

The fRTParams structure (page B-2) used with these operations is as follows:

struct RTGetVersionParam {
   unsigned short fVersion;
   };
typedef struct RTGetVersionParam RTGetVersionParam;

The kRTGetVersion operation assumes the current A5 world, while RTGetVersionA5 lets you specify one in the fA5 field of the RTPB structure (page B-2).

The fVersion field holds the returned version number as shown in Table B-4.

Table B-4 Current version numbers

Version number	Description
$0000	Classic 68K near model A5 world
$FFFD	CFM-68K runtime A5 world
$FFFF	Classic 68K far model (32-bit everything) A5 world