7526 DCT Reference

Library Function Usage

The 7526 program environment is different from PC-DOS, and thus not all the IBM C/2 library functions can be supported on the 7526. In general, all functions that are hardware or operating system dependent cannot be used by the 7526 application programs. The following is a list of categories of such C library functions.

Directory Control

Examples are (chdir, mkdir, rmdir). The 7526 does not support a file system.

File Handling

Examples are (fopen, rename). The 7526 does not support a file system.

Standard I/O

Examples are (getc, putc, gets, puts). The 7526 does not support DOS INT 21 functions. The API keypad and video function calls support these features on the 7526.

Math (floating point)

Examples are (_clear87, _control87). The 7526 does not support a math coprocessor. These calls may be used with floating point emulation.

Allocation Storage

Examples are (alloc, free, halloc). These calls are operating system dependent. The 7526 does not support dynamic memory management.

Process Control

Examples are (abort, exit, signal). The 7526 does not directly support multi-processing.

Time

Examples are (asctime, ctime, time). The API Real Time Clock function calls support these features in the 7526.

Printf

The printf, sprintf, scanf, etc. family of library routines should not be used because they pull in routines which are specific to personal computers hardware devices.