INT 2A,87 - Critical Section
AH = 87h AL = 00 start critical section = 01 end critical section returns nothing - specifies the start or end of a critical section - called by PRINT.COM - see Bibliography reference to "Undocumented DOS"
AH = 87h AL = 00 start critical section = 01 end critical section returns nothing - specifies the start or end of a critical section - called by PRINT.COM - see Bibliography reference to "Undocumented DOS"