READFAT	     PROC 

; ebx = cluster
WRITEFATX	     PROC 

; writes a value to a specified fat entry directly
; output : if error ax contains 0 
; preserves all other registers
; ecx = value
; ebx = cluster
XWRITEFAT12	     PROC 

; reads a fat value from the specified fat entry from sector directly
; output : cx contains fat value		ebx=start fat 
; preserves dx and bx
XREADFAT12	     PROC 

; writes a value to a specified fat entry in es:bx
; output : if error ax contains 0 
; preserves all registers but ax
; all fat should be loaded into memory before this macro
; ecx = value
; ebx = cluster
WRITEFAT12	     PROC 

; reads a fat value from the specified fat entry from es:bx
; output : cx contains value
; entire fat12 should be loaded into memory before this macro
READFAT12	     PROC 

DELFAT12CHAIN	     PROC 

; output bx equal the first fat number which contains value
;  bx = fat no that contains value
; clusters is 3 sector long so we read 3 sectors and 1024 fat entries at once
; preserves all other registers except bx and dx
; all fat should be loaded into memory before this macro
SEARCHFAT12	     PROC 

READFAT16		     PROC 

; ecx = value
; ebx = cluster
WRITEFAT16		     PROC 

XREADFAT16	     PROC 

XWRITEFAT16		     PROC 

DELFAT16CHAIN	     PROC 

SEARCHFAT16	     PROC 

; ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
; //////////////////////////////////////////////  fat32  routines  /////////////////////////////////////////////////
; ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
READFAT32	     PROC 
READFAT32	ENDP
WRITEFAT32	     PROC 
WRITEFAT32	ENDP
; call	xreadfat32	ebx
XREADFAT32	     PROC 

; xwritefat32	ebx,ecx
; ecx = value
XWRITEFAT32	     PROC 

; call	delfat32chain	ebx
; ebx = start fat
WRITEFAT32CHAIN	     PROC 

DELFAT32CHAIN	     PROC 

; call	searchfat32		ebx
SEARCHFAT32		     PROC 
FAT2MEM	     MACRO 
MEM2FAT	     MACRO 

FORMATA	     MACRO 	DRIVE,ENDSECT,VALUE
SETFLOPPYSERIAL	     MACRO 
WRITEFAT	     MACRO 	CLUSTER,VALUE
LOADFAT	     MACRO 
SAVEFAT	     MACRO 	CLUSTER,VALUE
DELFATCHAIN		     MACRO 	CLUSTER
SEARCHFAT	     MACRO 	VALUE

; input : es:di should point to filename 
GETCURRENTFATCLUSTER		     MACRO 
	ENDM
; es:di should point to filename
SETCURRENTFATCLUSTER		     MACRO 	CLUSTER

GETFILECLUSTER		     MACRO 	FNAME
SETFILECLUSTER		     MACRO 	FNAME,CLUSTER