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====== DRVREADY=====

^Published By^Date^Version^Knowledge Level^Keywords^
|Revelation Technologies|23 APR 1982|2.1X|INTERMEDIATE|DRVREADY, FLOPPY, DRIVE|

The DRVREADY function, provided with Advanced Revelation 2.12, lets you
determine whether a floppy disk drive is ready. Pass a 0 for drive A and a 1
for drive B. DRVREADY returns true (1) if the drive is ready, otherwise
false (0). Drives C and higher are not supported.

Figure 1 shows how DRVREADY can be used in a program.

**Note**: On some single floppy drive systems DRVREADY will return true when
testing (the non-existent) drive B.

=== Example: Figure 1 ===

<code>
DECLARE FUNCTION DRVREADY
DECLARE SUBROUTINE MSG
DRV  = 0
DONE = 0
LOOP
  DONE = DRVREADY(DRV)
  IF DONE ELSE
    MSG('Insert disk into drive %1%|and close door','','',CHAR(65DRV))
  END
UNTIL DONE
REPEAT
</code>