F$SchBit modified by Lothan

Lothan — Fri, 27 Jun 2014 23:20:35 -0000

Search Bits
Searches a specified memory allocation bit map for a free memory block of a specified size

OS9 F$SchBit 103F 12

Entry Conditions

D starting bit number

X starting address of the map

Y bit count (free bit block size)

U ending address of the map

Exit Conditions

D starting bit number

Y bit count

Error Output

CC carry set on error

B error code (if any)

Additional Information

The Search Bit call searches the specified allocation bit map for a free block (cleared bits) of the required length. The search starts at the starting bit number. If no block of the specified size exists, the call returns with the carry set, starting bit number, and size of the largest block.

krnp2

Recent changes to F$SchBit