INT 13 u - QUICKCACHE II v4.20 - FLUSH CACHE AH = 21h Return: AX = status (0000h successful) Desc: immediately write all dirty sectors back to disk Note: this is one out of several cache flush calls issued by the PTS-DOS 6.51 and S/DOS 1.0 kernel before rebooting. It is called with DL=80h and conflicts with the PS/2IBM PS/2, any model function of the same function number, because the kernel does not perform Quickcache's installation check first. SeeAlso: AH=25h"QUICKCACHE",AH=2Eh,AH=2Fh