INT 21 - Turbo Debug HARDWARE BREAKPOINTS - SEND CMD TO HARDWARE BRKPNT DRIVER AH = 40h BX = handle for character device "TDHDEBUG" CX = number of bytes to write DS:DX -> hardware breakpoint command (see #01418) Return: CF clear if successful AX = number of bytes actually written CF set on error AX = error code (05h,06h) (see #01680 at AH=59h/BX=0000h) Note: results are retrieved by reading from the device SeeAlso: AH=3Fh"Turbo Debug"