prepare for fat12

Author: jakiki6

os.asm

@@ -468,15 +468,15 @@ cs_command:
         ; Commands supported by bootOS
         ;
 commands:
-        db 2,"ls"
-        dw ls_command
-        db 4,"edit"
-        dw edit_command
-        db 2,"rm"
-        dw rm_command
+	db 2,"ls"
+.ls:	dw ls_command
+	db 4,"edit"
+.edit:	dw edit_command
+	db 2,"rm"
+.rm:	dw rm_command
 	db 1,"#"
-	dw cs_command
-        db 0
+.cs:	dw cs_command
+	db 0
 
 int_restart:            equ 0x20
 int_input_key:          equ 0x21

osall.iso

@@ -1,8 +1,23 @@
+; Entry: DS:BX = Filename terminated with zero.
+;        ES:DI = Point to source data (512 bytes)
+; Output: Carry flag = 0 = Found, 1 = Not found.
 load_file:
 	iret
+
+; Entry: DS:BX = Filename terminated with zero.
+;        ES:DI = Point to data target (512 bytes)
+; Output: Carry flag = 0 = Successful. 1 = Error.
 save_file:
         iret
+
+; Entry: DS:BX = Filename terminated with zero.
+; Output: None
 delete_file:
         iret
+
+; Entry: ES:DI = Point to data target (seperated by \r)
+;        DS:BX = Directory name terminated with zero.
+; Output: CL = Number of file.
 list_files:
-	iret
+	mov cl, 0x00
+	ret

shared/dummyfs.asm

@@ -1,8 +1,23 @@
+; Entry: DS:BX = Filename terminated with zero.
+;        ES:DI = Point to source data (512 bytes)
+; Output: Carry flag = 0 = Found, 1 = Not found.
 load_file:
 	iret
+
+; Entry: DS:BX = Filename terminated with zero.
+;        ES:DI = Point to data target (512 bytes)
+; Output: Carry flag = 0 = Successful. 1 = Error.
 save_file:
         iret
+
+; Entry: DS:BX = Filename terminated with zero.
+; Output: None
 delete_file:
         iret
+
+; Entry: ES:DI = Point to data target (seperated by \r)
+;        DS:BX = Directory name terminated with zero.
+; Output: CL = Number of file.
 list_files:
-	iret
+	mov cl, 0x00
+	ret

shared/fat12.asm

@@ -2,6 +2,7 @@
 	bits 16
 
 current_dir:	equ 0xe200
+dir_space:	equ 0xe300
 
 stage1:	mov si, 0x7c00
 	mov di, 0xe000
@@ -16,7 +17,7 @@ stage3:	mov si, int_table
 	xor ax, ax
 	stosw
 	loop .copy
-	mov word [bootOS.ls_command], ls_command
+	mov word [bootOS.commands + 3], ls_command
 	mov di, current_dir
 	mov cx, 0xfe
 	mov al, "/"
@@ -33,8 +34,38 @@ stage3:	mov si, int_table
 %include MODULE
 
 ls_command:
-	mov si, current_dir
+	push cs
+	pop es
+	mov bx, current_dir
+	mov di, dir_space
+	push di
+	mov cx, 0xff
+	xor ax, ax
+	rep stosb
+	pop di
 	call list_files
+	mov ah, 0x0e
+	mov bx, 0x0007
+	mov si, dir_space
+	inc cl
+	jmp short .1
+.loop1:	pusha
+	mov al, 0x0a
+	int 0x10
+	mov al, 0x0d
+	int 0x10
+	popa
+.1:	dec cl
+	cmp cl, 0x00
+	je .end
+.loop2:	lodsb
+	cmp al, 0x00
+	je .loop1
+	pusha
+	int 0x10
+	popa
+	jmp .loop2
+.end:	ret	
 
 int_table:
 	dw load_file