Added a os_upper_case function

source/kernel/features/cli.asm

@@ -22,30 +22,41 @@ os_read_cli:
 	call os_print_newline
 
 .check_matches:			; Check if the user input matches any internal commands
-	mov si, user_input
-	mov di, help_string
+	; Help
+	mov di, user_input
+	mov si, help_string
 	call os_compare_strings
 	cmp cl, 1
 	je help
 
-	mov si, user_input
-	mov di, clear_string
+	; Clear screen
+	mov di, user_input
+	mov si, clear_string
 	call os_compare_strings
 	cmp cl, 1
 	je clear
+
+	; Reboot
+	mov di, user_input
+	mov si, reboot_string
+	call os_compare_strings
+	cmp cl, 1
+	je os_reboot
+
+    ; Reboot
+	mov di, user_input
+	mov si, cat_string
+	call os_compare_strings
+	cmp cl, 1
+	je cat
 	
-	mov si, user_input
-	mov di, pong_string
+	; Pong
+	mov di, user_input
+	mov si, pong_string
 	call os_compare_strings
 	cmp cl, 1
 	je pong
 
-	mov si, user_input
-	mov di, snake_string
-	call os_compare_strings
-	cmp cl, 1
-	je snake
-
 	jmp .unkown
 
 .unkown:
@@ -68,14 +79,14 @@ help:
 	call os_print_string_nl
 	call os_read_cli.finish
 
+cat:
+   call util_cat
+   call os_read_cli.finish
+
 pong:
 	call game_pong
 	call os_read_cli.finish
 
-snake:
-   call game_snake
-   call os_read_cli.finish
-
 section .data
     welcome_text db 'Welcome to CrawOS, the Cool, Real and AWsome Operating System', 0
 	user_input times 20 db 0
@@ -83,8 +94,9 @@ section .data
 	prompt db 'CrawOS sh> ', 0
 	help_string db 'HELP', 0
 	clear_string db 'CLEAR', 0
+	reboot_string db 'REBOOT', 0
+	cat_string db 'CAT', 0
 	pong_string db 'PONG', 0
-	snake_string db 'SNAKE', 0
-	help_text db 'This is for Cowards: "HELP" for this help text, "CLEAR" to clear the screen, esc to reboot', 0
+	help_text db 'This is for Cowards: "HELP" for this help text, "CLEAR" to clear the screen, esc or "REBOOT" to reboot', 0
 	command_result_text db 'You typed: ', 0
 	unknown_command db 'Error: Unkown Command.. ', 0

source/kernel/features/strings.asm

@@ -12,7 +12,7 @@ os_compare_strings:
 .compare:
 	lodsb
 	scasb			; Compare di to si
-	jne .unequal		; If they are no equal, jump to .unequal
+	jne .unequal		; If they are not equal, jump to .unequal
 	cmp al, 0		; Check if string is finished
 	je .equal		; If it has, return true
 	jmp .compare		; Finally, repeat
@@ -24,3 +24,26 @@ os_compare_strings:
 .equal:
 	mov cl, 1
 	ret
+
+
+; Convert a string to all upper case
+os_upper_case:
+    pusha
+    mov di, si
+.loop:
+    lodsb
+    inc di
+    cmp al, 0
+    je .finish
+    cmp al, 7Ah
+    jns .loop
+    cmp al, 61h
+    js .loop
+    sub al, 20h
+    dec di
+    stosb
+    jmp .loop
+.finish:
+    popa
+    ret
+

source/kernel/features/utils.asm

@@ -0,0 +1,18 @@
+; Outputs the contents of a file
+util_cat:
+   pusha
+
+   call os_print_newline
+
+   mov si, cat_prompt
+   call os_print_string
+
+   mov ax, 11 ; length of input
+   mov di, user_input
+
+   popa
+   ret
+
+
+section .data:
+   cat_prompt db 'Enter file name: ', 0